CCIE复习指导：配置BGP案例十一

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Case 11
设置社团属性的实例:
路由器B配置如下:
!
router bgp 200
# [2 S* M# ~5 D$ d8 unetwork 160.10.0.0
* E% w* e) k, b1 u2 ineighbor 3.3.3.1 remote-as 300
8 x1 J* G4 I* |! q/ Wneighbor 3.3.3.1 send-community
neighbor 3.3.3.1 route-map Aiko out
$ t" }7 n3 W6 F" V!
" E) a  ]7 [5 _route-map Aiko permit 10
8 i3 V) L) N. m1 E/ O- x4 Nmatch ip address 1
) f% |/ s  ~* Q+ \" R- C7 u8 yset community no-advertise
!
route-map Aiko permit 20
match ip address 2
3 f, ~/ e& A- S; ^0 Zset community 100
# @7 J- G2 y0 @" F' L5 x* ^!
route-map Aiko permit 20
!
access-list 1 permit 160.10.0.0 255.255.0.0
access-list 2 permit 0.0.0.0 255.255.255.255
!
路由器C配置如下:
!
router bgp 300
- W/ W$ c# C" E' i# Pneighbor 3.3.3.3 remote-as 200
* X0 C' }% r( Xneighbor 3.3.3.3 route-map Aiko in
  N0 G* s, c$ x7 |- P; Z, i
!

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</p>route-map Aiko permit 10
- I- i. a) Y7 b4 U/ U, ~% ^* n. [match community 1 exact-match
set metric 100
5 A; h4 `: q5 P- G!
* d2 s  N: _" c" x# w! }route-map Aiko permit 20
6 [/ |% n  G% t# C$ @. y, ~match community 2
. u3 h4 {/ [4 A0 M  {' I!
ip community-list 1 permit 100
ip community-list 2 permit internet
  _1 n, ~2 P1 p6 q!
/ X0 d# o% b# h5 |3 N( lConditional Advertising
一些有选择性的宣告BGP路由的方法:
" ^- u. O4 w  i6 I9 Z) M: d1.当主路由(primary map)状态出故障之后,才宣告辅助路由(secondary map):
Aiko(config-router)#neighbor {ip-address} advertise-map {secondary-map} non-exist-map{primary-map}
2.选择性的宣告之前通过汇总命令抑制的路由:
) z, Z* C  g1 J# M8 y, ?3 tAiko(config-router)#neighbor {ip-address} unsuppress-map {map-name}
9 e+ F5 c; E0 wMonitoring and Maintaining BGP Filtering
一些辅助性的调试命令:
1.显示BGP表信息:
" C% Q" U# d; s  o% `% \' iAiko#show ip bgp
- L4 I+ m, N4 f1 o2.显示BGP邻居信息:
Aiko#show ip bgp neighbors [ip-address]
% H1 H  l1 U: j3.显示被惩罚的BGP路由信息:
Aiko#show ip bgp dampened-paths
& T  g2 c' {- k* S! ]4 g, i) E4.显示所有的BGP连接信息:
Aiko#show ip bgp summary
5.清除BGP的路由惩罚:
Aiko#clear ip bgp dampening [ip-address mask]
6.显示属于特定BGP社团的路由:
Aiko#show ip bgp community {number} [exact]