{"id":11009,"date":"2022-10-12T14:30:59","date_gmt":"2022-10-12T21:30:59","guid":{"rendered":"https:\/\/www.xh86.me\/?p=11009"},"modified":"2022-10-12T14:30:59","modified_gmt":"2022-10-12T21:30:59","slug":"linux-%e4%bd%bf%e7%94%a8-debian-linux-%e6%9e%84%e6%9e%b6-mpls-l3-%e7%bd%91%e7%bb%9c","status":"publish","type":"post","link":"https:\/\/www.xh86.me\/?p=11009","title":{"rendered":"[ Linux ] \u4f7f\u7528 Debian Linux \u6784\u67b6 MPLS L3 \u7f51\u7edc"},"content":{"rendered":"

\u6211\u4eec\u4eca\u5929\u6765\u8bb2\u4e00\u8bb2\u4e00\u79cd\u4e92\u901a\u6280\u672f\uff1a MPLS L3 VPN.<\/p>\n

MPLS \u662f\u4e00\u79cd 2.5 \u5c42\u7684\u6807\u7b7e\u6280\u672f\uff0c \u56e0\u4e3a\u5f53\u65f6IP\u8f6c\u53d1\u5927\u591a\u9760\u8f6f\u4ef6\u8fdb\u884c\uff0c\u5728\u8f6c\u53d1\u7684\u6bcf\u4e00\u8df3\u90fd\u8981\u8fdb\u884c\u81f3\u5c11\u4e00\u6b21\u6700\u957f\u5339\u914d\u67e5\u627e\uff0c\u64cd\u4f5c\u590d\u6742\u5bfc\u81f4\u8f6c\u53d1\u901f\u5ea6\u6bd4\u8f83\u6162\u3002\u4e8e\u662f MPLS \u5c31\u8bde\u751f\u4e86\u3002 \u5176\u4f18\u52bf\u4e5f\u662f\u663e\u800c\u6613\u89c1\u7684\uff0c \u8def\u7531\u5668\u8f6c\u53d1\u542b\u6709 MPLS label \u7684\u6570\u636e\u5305\u65f6\uff0c\u65e0\u9700\u518d\u82b1\u8d39\u5927\u91cf\u65f6\u95f4\u8fdb\u884c\u8def\u7531\u8868\u67e5\u627e\u7684\u52a8\u4f5c\uff0c\u53ea\u9700\u8981\u67e5\u627e\u7b80\u5355\u7684\u6807\u7b7e\u8868\uff0c\u5c31\u53ef\u4ee5\u67e5\u8be2\u5230\u8f6c\u53d1\u8def\u5f84\uff0c\u6781\u5927\u7684\u63d0\u5347\u4e86\u6570\u636e\u8f6c\u53d1\u901f\u5ea6\u3002 \u4f46\u540e\u6765 IP \u8f6c\u53d1\u9886\u57df\u6709\u5f88\u591a\u65b0\u6280\u672f\u4ea7\u751f\uff0c\u5982\u786c\u4ef6\u8f6c\u53d1\u4e0e\u7f51\u7edc\u5904\u7406\u5668\u7684\u51fa\u73b0\uff0c\u5bfc\u81f4\u73b0\u5728 MPLS \u7684\u901f\u5ea6\u4f18\u52bf\u4f53\u73b0\u4e0d\u51fa\u6765\uff0c\u7eaf MPLS \u8f6c\u53d1\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u51e0\u4e4e\u6ca1\u6709\u7528\u6b66\u4e4b\u5730 \u3002<\/p>\n

\u4f46 MPLS \u662f\u4e00\u4e2a\u5f88\u6709\u201c\u6f5c\u529b\u201d\u7684\u6280\u672f\uff0c\u53ef\u7075\u6d3b\u6269\u5c55\u3002\u5f88\u591a\u65b0\u7684\u5e94\u7528\u4f9d\u9760\u7eaf IP \u8f6c\u53d1\u5b9e\u73b0\u8d77\u6765\u6709\u5f88\u5927\u7684\u96be\u5ea6\uff0c\u4f46\u7528 MPLS \u518d\u7ed3\u5408\u5176\u5b83\u6280\u672f\u5c31\u53ef\u4ee5\u5b9e\u73b0\uff0c\u5982\uff1aBGP\/MPLS VPN\u3001\u6d41\u91cf\u5de5\u7a0b\u7b49\u6280\u672f\u7684\u4ea7\u751f\u5c31\u662f\u5bf9 MPLS \u7075\u6d3b\u6269\u5c55\u7684\u7ed3\u679c\u3002 \u6211\u4eec\u4eca\u5929\u5c31\u6765\u8bb2\u5176\u4e2d\u4e00\u79cd\u5178\u578b\u7684\u5e94\u7528\uff1aMPLS L3 VPN.<\/p>\n

\u4ec0\u4e48\u662f MPLS L3 VPN?<\/p>\n

MPLS VPN\u7684\u51fa\u73b0\u4e3b\u8981\u662f\u4e3a\u4e86\u8981\u89e3\u51b3\u4f20\u7edfVPN\u6280\u672f\u7684\u4e00\u4e9b\u56fa\u6709\u7f3a\u9677\uff0c\u8fd9\u6709\u5f88\u591a\u6280\u672f\u95ee\u9898\u9700\u8981\u89e3\u51b3\u7684\uff0c\u5176\u4e2d\u6700\u91cd\u8981\u7684\u662f\u5730\u5740\u91cd\u53e0\u7684\u95ee\u9898\u3002\u5fc5\u987b\u6709\u4e00\u79cd\u6280\u672f\u53ef\u4ee5\u4fdd\u8bc1\u4e0d\u540c\u7684\u7528\u6237VPN\u53ef\u4ee5\u4f7f\u7528\u76f8\u540c\u7684\u79c1\u6709\u5730\u5740\u7a7a\u95f4\uff0c\u800c\u4e14\u53ef\u4ee5\u5728\u516c\u5171\u7684\u9aa8\u5e72\u7f51\u7edc\u4e0a\u4e92\u76f8\u4e0d\u5f71\u54cd\u5730\u4ea4\u6362\u6570\u636e\u3002<\/p>\n

ref: \u65b0\u534e\u4e09\u5b98\u7f51 \u2013 L3 VPN \u57fa\u7840\u00a0http:\/\/www.h3c.com\/cn\/d_201212\/922115_30005_0.htm<\/a><\/cite><\/p><\/blockquote>\n

\u90a3\u4e48\uff0c\u6211\u4eec\u90fd\u77e5\u9053 Cisco \u7684 IOSXE \u4e0e Juniper \u7684 vMX \u90fd\u6709\u6210\u719f\u7684 MPLS L3 VPN \u89e3\u51b3\u65b9\u6848\u4ee5\u53ca\u5957\u4ef6\uff0c\u4f46\u662f\u8fd9\u4e9b\u5546\u4e1a\u516c\u53f8\u7684\u8def\u7531\u5668\u6388\u6743\u90fd\u975e\u5e38\u7684\u6602\u8d35\uff0c\u4e00\u53f0\u8bbe\u5907\u6388\u6743\u52a8\u8f84\u51e0\u4e07\u751a\u81f3\u5341\u51e0\u4e07\uff0c\u5bf9\u4e8e\u4e2a\u4eba\u7528\u6237\u5b66\u4e60\u6765\u8bf4\u6210\u672c\u5b9e\u5728\u662f\u592a\u5927\u4e86\uff0c\u6709\u6ca1\u6709\u4e0d\u9700\u8981\u82b1\u94b1\u5c31\u80fd\u5b66\u4e60 MPLS L3 VPN \u7684\u65b9\u6cd5\u5462\uff1f<\/p>\n

\u7b54\u6848\u662f\uff1a\u6709\u7684\u3002\u4eca\u5929\u6211\u4eec\u5c31\u7528 Debian Linux \u6765\u642d\u5efa VPNv4 \u7f51\u7edc\u3002<\/p>\n

\u62d3\u6251\u6574\u56fe\u5982\u4e0b\uff1a<\/p>\n

\"\"<\/div><\/figure>\n

 <\/p>\n

 <\/p>\n

\u8bdd\u4e0d\u591a\u8bf4\uff0c\u6211\u4eec\u73b0\u5728\u5f00\u59cb\u914d\u7f6e\u62d3\u6251\u3002<\/p>\n

\u9996\u5148\u4f60\u9700\u8981\u7f16\u8bd1\u5b89\u88c5\u8def\u7531\u5957\u4ef6\uff08\u8fd9\u91cc\u9009\u62e9 frr routing\uff09\uff0c\u5e76\u5728 sysctl \u4e2d\u6253\u5f00 MPLS mod \uff08 debian \u81ea\u5e26\u7684\u5185\u6838\u5df2\u7ecf\u5305\u542b\u4e86\u8be5 mod \uff09\uff0c\u5177\u4f53\u64cd\u4f5c\u53ef\u4ee5\u67e5\u770b Jamesit \u540c\u5b66\u5199\u7684 \uff1a\u300a\u4f7f\u7528Linux\u4f5c\u4e3aMPLS\u8def\u7531\u5668<\/a>\u300b<\/p>\n

\u5b89\u88c5\u5e76\u5347\u7ea7\u597d\u5fc5\u8981\u7ec4\u4ef6\u540e\uff0c\u6211\u4eec\u5728 Kernel level \u5c06 IP \u5730\u5740\u5982\u56fe\u4e2d\u6240\u793a\u914d\u7f6e\u597d\uff0c\u7136\u540e\u518d\u5f00\u59cb\u914d\u7f6e IGP \u534f\u8bae\u3002\u8fd9\u91cc\u6211\u4eec\u9009\u62e9\u4f7f\u7528 IS-IS \u4f5c\u4e3a IGP \u5e95\u5c42\uff08 IS-IS \u548c OSPF \u76f8\u6bd4\uff0c\u66f4\u9002\u5408\u4e8e\u5927\u578b\u8fd0\u8425\u5546 \uff09\u3002<\/p>\n

\u7531\u4e8e Linux \u7684 persistent net device naming \u673a\u5236\uff0c\u6240\u4ee5 eve \u4e0a e0 \u63a5\u53e3\u4f1a\u663e\u793a ens3\uff0ce1 \u663e\u793a ens4\uff0c\u4ee5\u6b64\u7c7b\u63a8\u8fdb\u884c\u914d\u7f6e\u3002<\/p>\n

\u4f7f\u7528\u00a0vtysh<\/code>\u00a0\u547d\u4ee4\u8fdb\u8def\u7531\u534f\u8bae\u547d\u4ee4\u884c\u8fdb\u884c\u914d\u7f6e\u3002<\/p>\n

\n
\n
\n
#P<\/span><\/div>\n<\/div>\n
\n
interface dummy0<\/span><\/div>\n<\/div>\n
\n
ip router isis <\/span>1<\/span><\/div>\n<\/div>\n
\n
!<\/span><\/div>\n<\/div>\n
\n
interface ens3<\/span><\/div>\n<\/div>\n
\n
ip router isis <\/span>1<\/span><\/div>\n<\/div>\n
\n
isis circuit-type level-<\/span>2<\/span>-only<\/span><\/div>\n<\/div>\n
\n
!<\/span><\/div>\n<\/div>\n
\n
interface ens4<\/span><\/div>\n<\/div>\n
\n
ip router isis <\/span>1<\/span><\/div>\n<\/div>\n
\n
isis circuit-type level-<\/span>2<\/span>-only<\/span><\/div>\n<\/div>\n
\n
!<\/span><\/div>\n<\/div>\n
\n
interface ens5<\/span><\/div>\n<\/div>\n
\n
ip router isis <\/span>1<\/span><\/div>\n<\/div>\n
\n
isis circuit-type level-<\/span>2<\/span>-only<\/span><\/div>\n<\/div>\n
\n
!<\/span><\/div>\n<\/div>\n
\n
router isis <\/span>1<\/span><\/div>\n<\/div>\n
\n
is-type level-<\/span>2<\/span>-only<\/span><\/div>\n<\/div>\n
\n
net <\/span>47.0000<\/span>.<\/span>0000<\/span>.<\/span>0000<\/span>.<\/span>0001<\/span>.<\/span>00<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n
\n
\n
#PE1<\/span><\/div>\n<\/div>\n
\n
interface dummy0<\/span><\/div>\n<\/div>\n
\n
ip router isis <\/span>1<\/span><\/div>\n<\/div>\n
\n
isis circuit-type level-<\/span>2<\/span>-only<\/span><\/div>\n<\/div>\n
\n
!<\/span><\/div>\n<\/div>\n
\n
interface ens3<\/span><\/div>\n<\/div>\n
\n
ip router isis <\/span>1<\/span><\/div>\n<\/div>\n
\n
isis circuit-type level-<\/span>2<\/span>-only<\/span><\/div>\n<\/div>\n
\n
!<\/span><\/div>\n<\/div>\n
\n
router isis <\/span>1<\/span><\/div>\n<\/div>\n
\n
is-type level-<\/span>2<\/span>-only<\/span><\/div>\n<\/div>\n
\n
net <\/span>47.0000<\/span>.<\/span>0000<\/span>.<\/span>0000<\/span>.<\/span>0002<\/span>.<\/span>00<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n
\n
\n
#PE2<\/span><\/div>\n<\/div>\n
\n
interface dummy0<\/span><\/div>\n<\/div>\n
\n
ip router isis <\/span>1<\/span><\/div>\n<\/div>\n
\n
isis circuit-type level-<\/span>2<\/span>-only<\/span><\/div>\n<\/div>\n
\n
!<\/span><\/div>\n<\/div>\n
\n
interface ens3<\/span><\/div>\n<\/div>\n
\n
ip router isis <\/span>1<\/span><\/div>\n<\/div>\n
\n
isis circuit-type level-<\/span>2<\/span>-only<\/span><\/div>\n<\/div>\n
\n
!<\/span><\/div>\n<\/div>\n
\n
router isis <\/span>1<\/span><\/div>\n<\/div>\n
\n
is-type level-<\/span>2<\/span>-only<\/span><\/div>\n<\/div>\n
\n
net <\/span>47.0000<\/span>.<\/span>0000<\/span>.<\/span>0000<\/span>.<\/span>0003<\/span>.<\/span>00<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n
\n
\n
#RR<\/span><\/div>\n<\/div>\n
\n
interface dummy0<\/span><\/div>\n<\/div>\n
\n
ip router isis <\/span>1<\/span><\/div>\n<\/div>\n
\n
isis circuit-type level-<\/span>2<\/span>-only<\/span><\/div>\n<\/div>\n
\n
!<\/span><\/div>\n<\/div>\n
\n
interface ens3<\/span><\/div>\n<\/div>\n
\n
ip router isis <\/span>1<\/span><\/div>\n<\/div>\n
\n
isis circuit-type level-<\/span>2<\/span>-only<\/span><\/div>\n<\/div>\n
\n
!<\/span><\/div>\n<\/div>\n
\n
router isis <\/span>1<\/span><\/div>\n<\/div>\n
\n
is-type level-<\/span>2<\/span>-only<\/span><\/div>\n<\/div>\n
\n
net <\/span>47.0000<\/span>.<\/span>0000<\/span>.<\/span>0000<\/span>.<\/span>0004<\/span>.<\/span>00<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n

\u6211\u4eec\u5728 P \u8def\u7531\u5668\u4e0a\u67e5\u770b\u90bb\u5c45\uff1a<\/p>\n

\n
\n
\n
localhos<\/span>t# show ip route isis<\/span><\/div>\n<\/div>\n
\n
Codes: K – kernel route, C – connected, S – static, R – RIP,<\/span><\/div>\n<\/div>\n
\n
O – OSPF, I – IS-IS, B – BGP, E – EIGRP, N – NHRP,<\/span><\/div>\n<\/div>\n
\n
T – Table, v – VNC, V – VNC-Direct, A – Babel, D – SHARP,<\/span><\/div>\n<\/div>\n
\n
F – PBR, f – OpenFabric,<\/span><\/div>\n<\/div>\n
\n
><\/span> – selected route, <\/span>*<\/span> – FIB route, q – queued route, r – rejected route<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
I<\/span>><\/span>* <\/span>10.0<\/span>.<\/span>0.1<\/span>\/<\/span>32<\/span> [<\/span>115<\/span>\/<\/span>20<\/span>]<\/span> via <\/span>192.168<\/span>.<\/span>2<\/span>.<\/span>1<\/span>, ens4, <\/span>00<\/span>:<\/span>05<\/span>:<\/span>18<\/span><\/div>\n<\/div>\n
\n
I<\/span>><\/span>* <\/span>10.0<\/span>.<\/span>0.3<\/span>\/<\/span>32<\/span> [<\/span>115<\/span>\/<\/span>20<\/span>]<\/span> via <\/span>192.168<\/span>.<\/span>3<\/span>.<\/span>2<\/span>, ens5, <\/span>00<\/span>:<\/span>03<\/span>:<\/span>04<\/span><\/div>\n<\/div>\n
\n
I<\/span>><\/span>* <\/span>10.0<\/span>.<\/span>0.4<\/span>\/<\/span>32<\/span> [<\/span>115<\/span>\/<\/span>20<\/span>]<\/span> via <\/span>192.168<\/span>.<\/span>1<\/span>.<\/span>1<\/span>, ens3, <\/span>00<\/span>:<\/span>17<\/span>:<\/span>05<\/span><\/div>\n<\/div>\n
\n
I <\/span>192.168<\/span>.<\/span>1<\/span>.<\/span>0<\/span>\/<\/span>24<\/span> [<\/span>115<\/span>\/<\/span>20<\/span>]<\/span> via <\/span>192.168<\/span>.<\/span>1<\/span>.<\/span>1<\/span>, ens3 inactive, <\/span>00<\/span>:<\/span>17<\/span>:<\/span>05<\/span><\/div>\n<\/div>\n
\n
I <\/span>192.168<\/span>.<\/span>2<\/span>.<\/span>0<\/span>\/<\/span>24<\/span> [<\/span>115<\/span>\/<\/span>20<\/span>]<\/span> via <\/span>192.168<\/span>.<\/span>2<\/span>.<\/span>1<\/span>, ens4 inactive, <\/span>00<\/span>:<\/span>05<\/span>:<\/span>18<\/span><\/div>\n<\/div>\n
\n
I <\/span>192.168<\/span>.<\/span>3<\/span>.<\/span>0<\/span>\/<\/span>24<\/span> [<\/span>115<\/span>\/<\/span>20<\/span>]<\/span> via <\/span>192.168<\/span>.<\/span>3<\/span>.<\/span>2<\/span>, ens5 inactive, <\/span>00<\/span>:<\/span>03<\/span>:<\/span>04<\/span><\/div>\n<\/div>\n
\n
localhos<\/span>t# show isis neighbor<\/span><\/div>\n<\/div>\n
\n
Area <\/span>1<\/span>:<\/span><\/div>\n<\/div>\n
\n
System Id Interface L State Holdtime SNPA<\/span><\/div>\n<\/div>\n
\n
localhost ens3 <\/span>2<\/span> Up <\/span>29<\/span> 0050.0100<\/span>.<\/span>0800<\/span><\/div>\n<\/div>\n
\n
localhost ens4 <\/span>2<\/span> Up <\/span>29<\/span> 0050.0100<\/span>.<\/span>0300<\/span><\/div>\n<\/div>\n
\n
localhost ens5 <\/span>2<\/span> Up <\/span>29<\/span> 0050.0100<\/span>.<\/span>0600<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n

\u53ef\u89c1\u8def\u7531\u90bb\u63a5\u5173\u7cfb\u5df2\u7ecf\u5efa\u7acb\u6210\u529f\uff0c\u8def\u7531\u5df2\u4ea4\u6362\u5b8c\u6210\u3002<\/p>\n

\u63a5\u4e0b\u6765\u9700\u8981\u5728\u63a5\u53e3\u4e0b\u542f\u52a8 MPLS address-family\uff1a<\/p>\n

\n
\n
\n
#P<\/span><\/div>\n<\/div>\n
\n
sysctl net.<\/span>mpls<\/span>.<\/span>conf<\/span>.<\/span>ens3<\/span>.<\/span>input<\/span>=<\/span>1<\/span><\/div>\n<\/div>\n
\n
sysctl net.<\/span>mpls<\/span>.<\/span>conf<\/span>.<\/span>ens4<\/span>.<\/span>input<\/span>=<\/span>1<\/span><\/div>\n<\/div>\n
\n
sysctl net.<\/span>mpls<\/span>.<\/span>conf<\/span>.<\/span>ens5<\/span>.<\/span>input<\/span>=<\/span>1<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
#vtysh.cli<\/span><\/div>\n<\/div>\n
\n
mpls ldp<\/span><\/div>\n<\/div>\n
\n
router-id <\/span>10.0<\/span>.<\/span>0.2<\/span><\/div>\n<\/div>\n
\n
address-family ipv4<\/span><\/div>\n<\/div>\n
\n
discovery transport-address <\/span>10.0<\/span>.<\/span>0.2<\/span><\/div>\n<\/div>\n
\n
interface ens3<\/span><\/div>\n<\/div>\n
\n
interface ens4<\/span><\/div>\n<\/div>\n
\n
interface ens5<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n
\n
\n
#PE1<\/span><\/div>\n<\/div>\n
\n
sysctl net.<\/span>mpls<\/span>.<\/span>conf<\/span>.<\/span>ens3<\/span>.<\/span>input<\/span>=<\/span>1<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
#vtysh.cli<\/span><\/div>\n<\/div>\n
\n
mpls ldp<\/span><\/div>\n<\/div>\n
\n
router-id <\/span>10.0<\/span>.<\/span>0.1<\/span><\/div>\n<\/div>\n
\n
address-family ipv4<\/span><\/div>\n<\/div>\n
\n
discovery transport-address <\/span>10.0<\/span>.<\/span>0.1<\/span><\/div>\n<\/div>\n
\n
interface ens3<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n
\n
\n
#PE2<\/span><\/div>\n<\/div>\n
\n
sysctl net.<\/span>mpls<\/span>.<\/span>conf<\/span>.<\/span>ens3<\/span>.<\/span>input<\/span>=<\/span>1<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
#vtysh.cli<\/span><\/div>\n<\/div>\n
\n
mpls ldp<\/span><\/div>\n<\/div>\n
\n
router-id <\/span>10.0<\/span>.<\/span>0.3<\/span><\/div>\n<\/div>\n
\n
address-family ipv4<\/span><\/div>\n<\/div>\n
\n
discovery transport-address <\/span>10.0<\/span>.<\/span>0.3<\/span><\/div>\n<\/div>\n
\n
interface ens3<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n
\n
\n
#PE3<\/span><\/div>\n<\/div>\n
\n
sysctl net.<\/span>mpls<\/span>.<\/span>conf<\/span>.<\/span>ens3<\/span>.<\/span>input<\/span>=<\/span>1<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
#vtysh.cli<\/span><\/div>\n<\/div>\n
\n
mpls ldp<\/span><\/div>\n<\/div>\n
\n
router-id <\/span>10.0<\/span>.<\/span>0.4<\/span><\/div>\n<\/div>\n
\n
address-family ipv4<\/span><\/div>\n<\/div>\n
\n
discovery transport-address <\/span>10.0<\/span>.<\/span>0.4<\/span><\/div>\n<\/div>\n
\n
interface ens3<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n

\u914d\u7f6e\u5b8c\u6bd5\uff0c\u6211\u4eec\u5728\u6838\u5fc3\u8def\u7531\u5668 P \u4e0a\u68c0\u67e5\u90bb\u5c45\u5173\u7cfb\uff1a<\/p>\n

\n
\n
\n
localhos<\/span>t# show mpls ldp nei<\/span><\/div>\n<\/div>\n
\n
AF ID State Remote Address Uptime<\/span><\/div>\n<\/div>\n
\n
ipv4 <\/span>10.0<\/span>.<\/span>0.1<\/span> OPERATIONAL <\/span>10.0<\/span>.<\/span>0.1<\/span> 00<\/span>:<\/span>01<\/span>:<\/span>53<\/span><\/div>\n<\/div>\n
\n
ipv4 <\/span>10.0<\/span>.<\/span>0.3<\/span> OPERATIONAL <\/span>10.0<\/span>.<\/span>0.3<\/span> 00<\/span>:<\/span>00<\/span>:<\/span>05<\/span><\/div>\n<\/div>\n
\n
ipv4 <\/span>10.0<\/span>.<\/span>0.4<\/span> OPERATIONAL <\/span>10.0<\/span>.<\/span>0.4<\/span> 00<\/span>:<\/span>00<\/span>:<\/span>46<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n

\u6240\u6709\u90bb\u5c45\u72b6\u6001\u4ee5\u53ca remote-address \u6b63\u786e\uff0cLDP \u914d\u7f6e\u5b8c\u6210\u3002<\/p>\n

IGP \u914d\u7f6e\u5b8c\u6210\u540e\uff0c\u6211\u4eec\u6765\u914d\u7f6e\u5185\u90e8\u7684 BGP \u534f\u8bae\u3002\u7531\u4e8e\u5728\u540c\u4e00\u4e2a domain \u5185\uff0c\u6240\u4ee5\u6211\u4eec\u91c7\u7528 iBGP + RR \u7684\u65b9\u5f0f\u6765\u7ec4\u5efa iBGP \u7f51\u7edc\u3002<\/p>\n

\n
\n
\n
#RR<\/span><\/div>\n<\/div>\n
\n
#vtysh.cli<\/span><\/div>\n<\/div>\n
\n
router bgp <\/span>65000<\/span><\/div>\n<\/div>\n
\n
no bgp default ipv4-unicast<\/span><\/div>\n<\/div>\n
\n
neighbor <\/span>10.0<\/span>.<\/span>0.1<\/span> remote-as <\/span>65000<\/span><\/div>\n<\/div>\n
\n
neighbor <\/span>10.0<\/span>.<\/span>0.1<\/span> update-source dummy0<\/span><\/div>\n<\/div>\n
\n
neighbor <\/span>10.0<\/span>.<\/span>0.3<\/span> remote-as <\/span>65000<\/span><\/div>\n<\/div>\n
\n
neighbor <\/span>10.0<\/span>.<\/span>0.3<\/span> update-source dummy0<\/span><\/div>\n<\/div>\n
\n
address-family ipv4 vpn<\/span><\/div>\n<\/div>\n
\n
neighbor <\/span>10.0<\/span>.<\/span>0.1<\/span> activate<\/span><\/div>\n<\/div>\n
\n
neighbor <\/span>10.0<\/span>.<\/span>0.1<\/span> route-reflector-client<\/span><\/div>\n<\/div>\n
\n
neighbor <\/span>10.0<\/span>.<\/span>0.3<\/span> activate<\/span><\/div>\n<\/div>\n
\n
neighbor <\/span>10.0<\/span>.<\/span>0.3<\/span> route-reflector-client<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n
\n
\n
#PE1 & PE2<\/span><\/div>\n<\/div>\n
\n
#vtysh.cli<\/span><\/div>\n<\/div>\n
\n
router bgp <\/span>65000<\/span><\/div>\n<\/div>\n
\n
no bgp default ipv4-unicast<\/span><\/div>\n<\/div>\n
\n
neighbor <\/span>10.0<\/span>.<\/span>0.4<\/span> remote-as <\/span>65000<\/span><\/div>\n<\/div>\n
\n
neighbor <\/span>10.0<\/span>.<\/span>0.4<\/span> update-source dummy0<\/span><\/div>\n<\/div>\n
\n
address-family ipv4 vpn<\/span><\/div>\n<\/div>\n
\n
neighbor <\/span>10.0<\/span>.<\/span>0.4<\/span> activate<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n

P \u8def\u7531\u5668\u65e0\u9700\u8fd0\u884c BGP \u534f\u8bae\uff0c\u4f7f\u7528\u7eaf MPLS \u7f51\u7edc\u8f6c\u53d1\u3002<\/p>\n

\u7531\u4e8e\u6211\u4eec\u8fd9\u79cd\u62d3\u6251\u4e0d\u9700\u8981\u6fc0\u6d3b BGP IPv4 address-family\uff0c\u6240\u4ee5\u6211\u4eec\u5c31\u4e0d\u914d\u7f6e address-family unicast \u4e86\u3002\u4f46\u662f\u5728\u751f\u4ea7\u73af\u5883\u4e2d\u4e00\u5b9a\u8981\u8bb0\u5f97\u914d\u7f6e\uff0c\u4e3a\u4e86\u89c4\u8303\uff0c\u5207\u8bb0\u3002<\/p>\n

\u914d\u7f6e\u5b8c\u6210\u540e\uff0c\u6211\u4eec\u6765\u68c0\u67e5 RR \u7684 BGP VPNv4 sesison:<\/p>\n

\n
\n
\n
#RR<\/span><\/div>\n<\/div>\n
\n
#vtysh.cli<\/span><\/div>\n<\/div>\n
\n
localhos<\/span>t# show bgp summary<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
IPv4 VPN Summary:<\/span><\/div>\n<\/div>\n
\n
BGP router identifier <\/span>192.168<\/span>.<\/span>1<\/span>.<\/span>1<\/span>, local AS number <\/span>65000<\/span> vrf-id <\/span>0<\/span><\/div>\n<\/div>\n
\n
BGP table version <\/span>0<\/span><\/div>\n<\/div>\n
\n
RIB entries <\/span>0<\/span>, using <\/span>0<\/span> bytes <\/span>of<\/span> memory<\/span><\/div>\n<\/div>\n
\n
Peers <\/span>2<\/span>, using <\/span>41<\/span> KiB <\/span>of<\/span> memory<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up\/Down State\/PfxRcd<\/span><\/div>\n<\/div>\n
\n
10.0<\/span>.<\/span>0.1<\/span> 4<\/span> 65000<\/span> 4<\/span> 4<\/span> 0<\/span> 0<\/span> 0<\/span> 00<\/span>:<\/span>01<\/span>:<\/span>08<\/span> 0<\/span><\/div>\n<\/div>\n
\n
10.0<\/span>.<\/span>0.3<\/span> 4<\/span> 65000<\/span> 3<\/span> 3<\/span> 0<\/span> 0<\/span> 0<\/span> 00<\/span>:<\/span>00<\/span>:<\/span>37<\/span> 0<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
Total number <\/span>of<\/span> neighbors <\/span>2<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n

\u73b0\u5728\u5185\u7f51\u7684 VPNv4 BGP \u5df2\u7ecf\u5b8c\u6210\u4e86\uff0c\u6211\u4eec\u5f00\u59cb\u914d\u63a5\u4e0b\u6765\u7684\u6b65\u9aa4\uff1a\u5148\u914d\u7f6e VRF \uff0c\u518d\u914d\u7f6e\u4e0e\u5ba2\u6237\u7684 BGP Session.<\/p>\n

\n
\n
\n
#PE1<\/span><\/div>\n<\/div>\n
\n
# linux shell<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
# VRF BLUE<\/span><\/div>\n<\/div>\n
\n
ip link add blue type vrf table <\/span>100<\/span><\/div>\n<\/div>\n
\n
ip link set blue up<\/span><\/div>\n<\/div>\n
\n
ip route add vrf blue unreachable default metric <\/span>4278198272<\/span><\/div>\n<\/div>\n
\n
ip link set ens4 vrf blue <\/span><\/div>\n<\/div>\n
\n
ip link set ens4 up<\/span><\/div>\n<\/div>\n
\n
ip addr add <\/span>10.10<\/span>.<\/span>1<\/span>.<\/span>1<\/span>\/<\/span>24<\/span> dev ens4<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
# VRF RED<\/span><\/div>\n<\/div>\n
\n
ip link add red type vrf table <\/span>200<\/span><\/div>\n<\/div>\n
\n
ip link set red up<\/span><\/div>\n<\/div>\n
\n
ip route add vrf red unreachable default metric <\/span>4278198272<\/span><\/div>\n<\/div>\n
\n
ip link set ens5 vrf red <\/span><\/div>\n<\/div>\n
\n
ip link set ens5 up<\/span><\/div>\n<\/div>\n
\n
ip addr add <\/span>10.10<\/span>.<\/span>1<\/span>.<\/span>1<\/span>\/<\/span>24<\/span> dev ens5<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n
\n
\n
#PE2<\/span><\/div>\n<\/div>\n
\n
#Linux shell<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
#VRF RED<\/span><\/div>\n<\/div>\n
\n
ip link add red type vrf table <\/span>200<\/span><\/div>\n<\/div>\n
\n
ip link set red up<\/span><\/div>\n<\/div>\n
\n
ip route add vrf red unreachable default metric <\/span>4278198272<\/span><\/div>\n<\/div>\n
\n
ip link set ens4 vrf red<\/span><\/div>\n<\/div>\n
\n
ip link set ens4 up<\/span><\/div>\n<\/div>\n
\n
ip addr add <\/span>10.10<\/span>.<\/span>2<\/span>.<\/span>1<\/span>\/<\/span>24<\/span> dev ens4<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
#VRF BLUE<\/span><\/div>\n<\/div>\n
\n
ip link add blue type vrf table <\/span>100<\/span><\/div>\n<\/div>\n
\n
ip link set blue up<\/span><\/div>\n<\/div>\n
\n
ip route add vrf blue unreachable default metric <\/span>4278198272<\/span><\/div>\n<\/div>\n
\n
ip link set ens5 vrf blue<\/span><\/div>\n<\/div>\n
\n
ip link set ens5 up<\/span><\/div>\n<\/div>\n
\n
ip addr add <\/span>10.10<\/span>.<\/span>2<\/span>.<\/span>1<\/span>\/<\/span>24<\/span> dev ens5<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n

\u5230\u6b64\uff0cLinux VRF \u914d\u7f6e\u5b8c\u6210\u3002<\/p>\n

\u5ba2\u6237\u4fa7\u5df2\u7ecf\u9884\u914d\u7f6e\u597d\u4e0e PE \u7684 BGP \u94fe\u63a5\uff0c\u4e14\u5ba3\u544a\u4e86\u5ba2\u6237\u8def\u7531\uff0c\u4e8e\u662f\u6211\u4eec\u73b0\u5728\u6765\u914d\u7f6e PE1 & PE2 \u7684 VRF leak:<\/p>\n

\n
\n
\n
#PE1<\/span><\/div>\n<\/div>\n
\n
#vtysh.cli<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
router bgp <\/span>65000<\/span> vrf blue<\/span><\/div>\n<\/div>\n
\n
neighbor <\/span>10.10<\/span>.<\/span>1<\/span>.<\/span>2<\/span> remote-as <\/span>65535<\/span><\/div>\n<\/div>\n
\n
bgp router-id <\/span>10.10<\/span>.<\/span>1<\/span>.<\/span>1<\/span><\/div>\n<\/div>\n
\n
!<\/span><\/div>\n<\/div>\n
\n
address-family ipv4 unicast<\/span><\/div>\n<\/div>\n
\n
label vpn export auto<\/span><\/div>\n<\/div>\n
\n
rd vpn export <\/span>65000<\/span>:<\/span>100<\/span><\/div>\n<\/div>\n
\n
rt vpn both <\/span>65000<\/span>:<\/span>100<\/span><\/div>\n<\/div>\n
\n
export vpn<\/span><\/div>\n<\/div>\n
\n
import vpn<\/span><\/div>\n<\/div>\n
\n
exit-address-family<\/span><\/div>\n<\/div>\n
\n
!<\/span><\/div>\n<\/div>\n
\n
router bgp <\/span>65000<\/span> vrf red<\/span><\/div>\n<\/div>\n
\n
neighbor <\/span>10.10<\/span>.<\/span>1<\/span>.<\/span>2<\/span> remote-as <\/span>65530<\/span><\/div>\n<\/div>\n
\n
bgp router-id <\/span>10.10<\/span>.<\/span>1<\/span>.<\/span>1<\/span><\/div>\n<\/div>\n
\n
!<\/span><\/div>\n<\/div>\n
\n
address-family ipv4 unicast<\/span><\/div>\n<\/div>\n
\n
label vpn export auto<\/span><\/div>\n<\/div>\n
\n
rd vpn export <\/span>65000<\/span>:<\/span>200<\/span><\/div>\n<\/div>\n
\n
rt vpn both <\/span>65000<\/span>:<\/span>200<\/span><\/div>\n<\/div>\n
\n
export vpn<\/span><\/div>\n<\/div>\n
\n
import vpn<\/span><\/div>\n<\/div>\n
\n
exit-address-family<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n
\n
\n
#PE2<\/span><\/div>\n<\/div>\n
\n
#vtysh.cli<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
router bgp <\/span>65000<\/span> vrf blue<\/span><\/div>\n<\/div>\n
\n
bgp router-id <\/span>10.10<\/span>.<\/span>2<\/span>.<\/span>1<\/span><\/div>\n<\/div>\n
\n
neighbor <\/span>10.10<\/span>.<\/span>2<\/span>.<\/span>2<\/span> remote-as <\/span>65535<\/span><\/div>\n<\/div>\n
\n
!<\/span><\/div>\n<\/div>\n
\n
address-family ipv4 unicast<\/span><\/div>\n<\/div>\n
\n
label vpn export auto<\/span><\/div>\n<\/div>\n
\n
rd vpn export <\/span>65000<\/span>:<\/span>100<\/span><\/div>\n<\/div>\n
\n
rt vpn both <\/span>65000<\/span>:<\/span>100<\/span><\/div>\n<\/div>\n
\n
export vpn<\/span><\/div>\n<\/div>\n
\n
import vpn<\/span><\/div>\n<\/div>\n
\n
exit-address-family<\/span><\/div>\n<\/div>\n
\n
!<\/span><\/div>\n<\/div>\n
\n
router bgp <\/span>65000<\/span> vrf red<\/span><\/div>\n<\/div>\n
\n
bgp router-id <\/span>10.10<\/span>.<\/span>2<\/span>.<\/span>1<\/span><\/div>\n<\/div>\n
\n
neighbor <\/span>10.10<\/span>.<\/span>2<\/span>.<\/span>2<\/span> remote-as <\/span>65530<\/span><\/div>\n<\/div>\n
\n
!<\/span><\/div>\n<\/div>\n
\n
address-family ipv4 unicast<\/span><\/div>\n<\/div>\n
\n
label vpn export auto<\/span><\/div>\n<\/div>\n
\n
rd vpn export <\/span>65000<\/span>:<\/span>200<\/span><\/div>\n<\/div>\n
\n
rt vpn both <\/span>65000<\/span>:<\/span>200<\/span><\/div>\n<\/div>\n
\n
export vpn<\/span><\/div>\n<\/div>\n
\n
import vpn<\/span><\/div>\n<\/div>\n
\n
exit-address-family<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n

\u5728 PE \u4e0a\u914d\u7f6e\u7684\u65f6\u5019\u6709\u53ef\u80fd\u9047\u5230 Zebra.d \u62a5\u9519\u7684\u95ee\u9898\uff0c\u4e0d\u7528\u614c\uff0c\u5148\u00a0show run<\/code>\u00a0\u770b\u770b\u914d\u7f6e\u6709\u6ca1\u6709\u6b63\u786e\u8f93\u5165\u8fdb\u53bb\uff0c\u914d\u7f6e\u8f93\u5165\u6b63\u786e\u7684\u8bdd\u5c31\u53ef\u4ee5\u65e0\u89c6\u3002<\/p>\n

\u67e5\u770b\u90bb\u5c45\u5217\u8868\uff1a<\/p>\n

\n
\n
\n
#PE1<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
localhos<\/span>t# show ip bgp vrf all summary<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
Instance default:<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
IPv4 VPN Summary:<\/span><\/div>\n<\/div>\n
\n
BGP router identifier <\/span>192.168<\/span>.<\/span>2<\/span>.<\/span>1<\/span>, local AS number <\/span>65000<\/span> vrf-id <\/span>0<\/span><\/div>\n<\/div>\n
\n
BGP table version <\/span>0<\/span><\/div>\n<\/div>\n
\n
RIB entries <\/span>5<\/span>, using <\/span>920<\/span> bytes <\/span>of<\/span> memory<\/span><\/div>\n<\/div>\n
\n
Peers <\/span>1<\/span>, using <\/span>20<\/span> KiB <\/span>of<\/span> memory<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up\/Down State\/PfxRcd<\/span><\/div>\n<\/div>\n
\n
10.0<\/span>.<\/span>0.4<\/span> 4<\/span> 65000<\/span> 82<\/span> 80<\/span> 0<\/span> 0<\/span> 0<\/span> 01<\/span>:<\/span>13<\/span>:<\/span>17<\/span> 2<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
Total number <\/span>of<\/span> neighbors <\/span>1<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
Instance blue:<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
IPv4 Unicast Summary:<\/span><\/div>\n<\/div>\n
\n
BGP router identifier <\/span>10.10<\/span>.<\/span>1<\/span>.<\/span>1<\/span>, local AS number <\/span>65000<\/span> vrf-id <\/span>9<\/span><\/div>\n<\/div>\n
\n
BGP table version <\/span>2<\/span><\/div>\n<\/div>\n
\n
RIB entries <\/span>3<\/span>, using <\/span>552<\/span> bytes <\/span>of<\/span> memory<\/span><\/div>\n<\/div>\n
\n
Peers <\/span>1<\/span>, using <\/span>20<\/span> KiB <\/span>of<\/span> memory<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up\/Down State\/PfxRcd<\/span><\/div>\n<\/div>\n
\n
10.10<\/span>.<\/span>1<\/span>.<\/span>2<\/span> 4<\/span> 65535<\/span> 31<\/span> 26<\/span> 0<\/span> 0<\/span> 0<\/span> 00<\/span>:<\/span>20<\/span>:<\/span>18<\/span> 1<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
Total number <\/span>of<\/span> neighbors <\/span>1<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
Instance red:<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
IPv4 Unicast Summary:<\/span><\/div>\n<\/div>\n
\n
BGP router identifier <\/span>10.10<\/span>.<\/span>1<\/span>.<\/span>1<\/span>, local AS number <\/span>65000<\/span> vrf-id <\/span>10<\/span><\/div>\n<\/div>\n
\n
BGP table version <\/span>4<\/span><\/div>\n<\/div>\n
\n
RIB entries <\/span>3<\/span>, using <\/span>552<\/span> bytes <\/span>of<\/span> memory<\/span><\/div>\n<\/div>\n
\n
Peers <\/span>1<\/span>, using <\/span>20<\/span> KiB <\/span>of<\/span> memory<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up\/Down State\/PfxRcd<\/span><\/div>\n<\/div>\n
\n
10.10<\/span>.<\/span>1<\/span>.<\/span>2<\/span> 4<\/span> 65530<\/span> 37<\/span> 30<\/span> 0<\/span> 0<\/span> 0<\/span> 00<\/span>:<\/span>18<\/span>:<\/span>32<\/span> 1<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
Total number <\/span>of<\/span> neighbors <\/span>1<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n
\n
\n
#PE2<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
localhos<\/span>t# show ip bgp vrf all su<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
Instance default:<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
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IPv4 VPN Summary:<\/span><\/div>\n<\/div>\n
\n
BGP router identifier <\/span>192.168<\/span>.<\/span>3<\/span>.<\/span>2<\/span>, local AS number <\/span>65000<\/span> vrf-id <\/span>0<\/span><\/div>\n<\/div>\n
\n
BGP table version <\/span>0<\/span><\/div>\n<\/div>\n
\n
RIB entries <\/span>5<\/span>, using <\/span>920<\/span> bytes <\/span>of<\/span> memory<\/span><\/div>\n<\/div>\n
\n
Peers <\/span>1<\/span>, using <\/span>20<\/span> KiB <\/span>of<\/span> memory<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up\/Down State\/PfxRcd<\/span><\/div>\n<\/div>\n
\n
10.0<\/span>.<\/span>0.4<\/span> 4<\/span> 65000<\/span> 80<\/span> 76<\/span> 0<\/span> 0<\/span> 0<\/span> 01<\/span>:<\/span>11<\/span>:<\/span>57<\/span> 2<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
Total number <\/span>of<\/span> neighbors <\/span>1<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
Instance blue:<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
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IPv4 Unicast Summary:<\/span><\/div>\n<\/div>\n
\n
BGP router identifier <\/span>10.10<\/span>.<\/span>2<\/span>.<\/span>1<\/span>, local AS number <\/span>65000<\/span> vrf-id <\/span>10<\/span><\/div>\n<\/div>\n
\n
BGP table version <\/span>1<\/span><\/div>\n<\/div>\n
\n
RIB entries <\/span>1<\/span>, using <\/span>184<\/span> bytes <\/span>of<\/span> memory<\/span><\/div>\n<\/div>\n
\n
Peers <\/span>1<\/span>, using <\/span>20<\/span> KiB <\/span>of<\/span> memory<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up\/Down State\/PfxRcd<\/span><\/div>\n<\/div>\n
\n
10.10<\/span>.<\/span>2<\/span>.<\/span>2<\/span> 4<\/span> 65535<\/span> 11<\/span> 8<\/span> 0<\/span> 0<\/span> 0<\/span> 00<\/span>:<\/span>05<\/span>:<\/span>43<\/span> 1<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
Total number <\/span>of<\/span> neighbors <\/span>1<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
Instance red:<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
IPv4 Unicast Summary:<\/span><\/div>\n<\/div>\n
\n
BGP router identifier <\/span>10.10<\/span>.<\/span>2<\/span>.<\/span>1<\/span>, local AS number <\/span>65000<\/span> vrf-id <\/span>9<\/span><\/div>\n<\/div>\n
\n
BGP table version <\/span>2<\/span><\/div>\n<\/div>\n
\n
RIB entries <\/span>3<\/span>, using <\/span>552<\/span> bytes <\/span>of<\/span> memory<\/span><\/div>\n<\/div>\n
\n
Peers <\/span>1<\/span>, using <\/span>20<\/span> KiB <\/span>of<\/span> memory<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up\/Down State\/PfxRcd<\/span><\/div>\n<\/div>\n
\n
10.10<\/span>.<\/span>2<\/span>.<\/span>2<\/span> 4<\/span> 65530<\/span> 11<\/span> 9<\/span> 0<\/span> 0<\/span> 0<\/span> 00<\/span>:<\/span>05<\/span>:<\/span>43<\/span> 1<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
Total number <\/span>of<\/span> neighbors <\/span>1<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n

\u53ef\u4ee5\u770b\u5230\u4e24\u8fb9 PE \u90fd\u6536\u5230\u4e86\u76f8\u8fde\u90bb\u5c45\u7684\u8def\u7531\uff0c\u4e14\u4ece RR \u6536\u5230\u4e86\u522b\u7684 pop \u53d1\u8fc7\u6765\u7684\u8def\u7531\u6761\u76ee\uff0c\u90a3\u4e48\u6211\u4eec\u5c31\u62bd\u67e5\u4e00\u4e0b\u6df1\u5733\u8fb9\u754c\u8def\u7531\u5668\uff0c\u770b\u770b\u6709\u6ca1\u6709\u6b63\u5e38\u5de5\u4f5c\u5427\uff01<\/p>\n

\n
\n
\n
#ShenZhen-Edge<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
Route<\/span>r#show ip bgp<\/span><\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\n
Network Next Hop Metric LocPrf Weight Path<\/span><\/div>\n<\/div>\n
\n
*<\/span>><\/span> 172.19<\/span>.<\/span>1<\/span>.<\/span>0<\/span>\/<\/span>24<\/span> 0<\/span>.<\/span>0<\/span>.<\/span>0<\/span>.<\/span>0<\/span> 0<\/span> 32768<\/span> i<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n

\u54a6\uff1f\u4e3a\u4ec0\u4e48\u53ea\u6709\u672c\u5730\u53d1\u51fa\u53bb\u7684\u8def\u7531\u5728 BGP \u6570\u636e\u5e93\u5185\uff0c\u5bf9\u7aef\u7684\u00a0172.19.2.0\/24<\/code>\u00a0\u8def\u7531\u5462\uff1f\u60f3\u8981\u77e5\u9053\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u4eec\u9700\u8981\u4e86\u89e3\u4e00\u4e0b BGP \u7684\u9632\u73af\u673a\u5236\u3002<\/p>\n

\u9996\u5148\uff0c\u6211\u4eec\u6765\u89c2\u5bdf\u00a0172.19.2.0\/24<\/code>\u00a0\u8def\u7531\u7684 ASPATH \u8d70\u5411\uff1a<\/p>\n

AS65535 <- AS65000 <- AS65535 i<\/code><\/p>\n

\u90a3\u4e48\uff0c\u5bf9\u4e8e\u6536\u5230\u7684\u8def\u5f84\u91cc\u9762\u5df2\u7ecf\u542b\u6709\u81ea\u5df1 ASPATH \u7684\u8def\u7531\uff0cBGP \u4f1a\u5c06\u5176\u4e22\u5f03\uff0c\u4ee5\u9632\u6b62\u73af\u8def\uff0c\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u8fb9\u754c\u8def\u7531\u5668\u6536\u4e0d\u5230\u8def\u7531\u7684\u539f\u56e0\u3002\u8981\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u4eec\u6709\u4e24\u79cd\u65b9\u6848\uff1a<\/p>\n

    \n
  1. CE \u4e0a\u914d\u7f6e allowas-in<\/li>\n
  2. PE \u4e0a\u914d\u7f6e as-override<\/li>\n<\/ol>\n

     <\/p>\n

    \u6211\u4eec\u6765\u4e86\u89e3\u4e00\u4e0b\u5b83\u4eec\u7684\u539f\u7406\uff1a<\/p>\n

    allowas-in \u5c31\u662f\u5173\u95ed\u4e86 BGP \u7684\u6c34\u5e73\u5206\u5272\uff0c\u8fd9\u6837\u505a\u4f1a\u6709\u8def\u7531\u73af\u8def\u7684\u5371\u9669\u3002<\/p>\n

    as-override \u7531\u8fd0\u8425\u5546\u66ff\u6362\u6700\u672b\u5c3e\u7684 ASPATH \u4e3a\u8fd0\u8425\u5546\u7684 ASPATH\uff0c\u4ece\u800c\u907f\u514d\u89e6\u53d1\u6c34\u5e73\u5206\u5272\u5bfc\u81f4\u65e0\u6cd5\u63a5\u6536\u8def\u7531\uff0c\u73af\u8def\u7684\u5371\u9669\u5f88\u5c0f\u3002<\/p>\n

    \u4e8e\u662f\u6211\u4eec\u5728PE\u4e0a\u914d\u7f6e as-override.<\/p>\n

    \n
    \n
    \n
    #PE1<\/span><\/div>\n<\/div>\n
    \n
    #vtysh.cli<\/span><\/div>\n<\/div>\n
    \n
    <\/div>\n<\/div>\n
    \n
    router bgp <\/span>65000<\/span> vrf blue<\/span><\/div>\n<\/div>\n
    \n
    !<\/span><\/div>\n<\/div>\n
    \n
    address-family ipv4 unicast<\/span><\/div>\n<\/div>\n
    \n
    neighbor <\/span>10.10<\/span>.<\/span>1<\/span>.<\/span>2<\/span> as-override<\/span><\/div>\n<\/div>\n
    \n
    exit-address-family<\/span><\/div>\n<\/div>\n
    \n
    !<\/span><\/div>\n<\/div>\n
    \n
    router bgp <\/span>65000<\/span> vrf red<\/span><\/div>\n<\/div>\n
    \n
    !<\/span><\/div>\n<\/div>\n
    \n
    address-family ipv4 unicast<\/span><\/div>\n<\/div>\n
    \n
    neighbor <\/span>10.10<\/span>.<\/span>1<\/span>.<\/span>2<\/span> as-override<\/span><\/div>\n<\/div>\n
    \n
    exit-address-family<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n
    \n
    \n
    \n
    #PE2<\/span><\/div>\n<\/div>\n
    \n
    #vtysh.cli<\/span><\/div>\n<\/div>\n
    \n
    <\/div>\n<\/div>\n
    \n
    router bgp <\/span>65000<\/span> vrf blue<\/span><\/div>\n<\/div>\n
    \n
    !<\/span><\/div>\n<\/div>\n
    \n
    address-family ipv4 unicast<\/span><\/div>\n<\/div>\n
    \n
    neighbor <\/span>10.10<\/span>.<\/span>2<\/span>.<\/span>2<\/span> as-override<\/span><\/div>\n<\/div>\n
    \n
    exit-address-family<\/span><\/div>\n<\/div>\n
    \n
    !<\/span><\/div>\n<\/div>\n
    \n
    router bgp <\/span>65000<\/span> vrf red<\/span><\/div>\n<\/div>\n
    \n
    !<\/span><\/div>\n<\/div>\n
    \n
    address-family ipv4 unicast<\/span><\/div>\n<\/div>\n
    \n
    neighbor <\/span>10.10<\/span>.<\/span>2<\/span>.<\/span>2<\/span> as-override<\/span><\/div>\n<\/div>\n
    \n
    exit-address-family<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n

    \u914d\u7f6e\u5b8c\u6210\uff0c\u518d\u6765\u67e5\u770b\u6df1\u5733\u7684\u8fb9\u754c\u8def\u7531\uff1a<\/p>\n

    \n
    \n
    \n
    #Shenzhen-edge<\/span><\/div>\n<\/div>\n
    \n
    <\/div>\n<\/div>\n
    \n
    Route<\/span>r#show ip bgp<\/span><\/div>\n<\/div>\n
    \n
    BGP table version is <\/span>5<\/span>, local router ID is <\/span>172.19<\/span>.<\/span>1<\/span>.<\/span>1<\/span><\/div>\n<\/div>\n
    \n
    <\/div>\n<\/div>\n
    \n
    Network Next Hop Metric LocPrf Weight Path<\/span><\/div>\n<\/div>\n
    \n
    *<\/span>><\/span> 172.19<\/span>.<\/span>1<\/span>.<\/span>0<\/span>\/<\/span>24<\/span> 0<\/span>.<\/span>0<\/span>.<\/span>0<\/span>.<\/span>0<\/span> 0<\/span> 32768<\/span> i<\/span><\/div>\n<\/div>\n
    \n
    *<\/span>><\/span> 172.19<\/span>.<\/span>2<\/span>.<\/span>0<\/span>\/<\/span>24<\/span> 10.10<\/span>.<\/span>1<\/span>.<\/span>1<\/span> 0<\/span> 0<\/span> 65000<\/span> 65000<\/span> i<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n

    \u53ef\u89c1\u6df1\u5733\u7684\u8fb9\u754c\u8def\u7531\u5df2\u7ecf\u6b63\u5e38\u63a5\u6536\u8def\u7531\u6761\u76ee\u4e86\u3002\u4e8e\u662f\u6211\u4eec\u6765\u6d4b\u8bd5\u6570\u636e\u4f20\u8f93\u60c5\u51b5\uff1a<\/p>\n

    \"\"<\/div><\/figure>\n

    \u6570\u636e\u5df2\u7ecf\u6b63\u786e\u7684\u4f20\u8f93\u5230\u5bf9\u5e94\u7684 VRF \u4e86\uff0c\u57fa\u4e8e Debian Linux \u7684 MPLS L3 VPN \u642d\u5efa\u5b8c\u6210\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u6211\u4eec\u4eca\u5929\u6765\u8bb2\u4e00\u8bb2\u4e00\u79cd\u4e92\u901a\u6280\u672f\uff1a MPLS L3 VPN. MPLS \u662f\u4e00\u79cd 2.5 \u5c42\u7684\u6807\u7b7e\u6280\u672f\uff0c \u56e0\u4e3a\u5f53\u65f6I […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12,3],"tags":[],"class_list":["post-11009","post","type-post","status-publish","format-standard","hentry","category-linux","category-system"],"_links":{"self":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts\/11009","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=11009"}],"version-history":[{"count":1,"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts\/11009\/revisions"}],"predecessor-version":[{"id":11010,"href":"https:\/\/www.xh86.me\/index.php?rest_route=\/wp\/v2\/posts\/11009\/revisions\/11010"}],"wp:attachment":[{"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=11009"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=11009"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xh86.me\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=11009"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}