思科CCIE考试：配置BGP案例十一

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Case 11
+ T+ c$ N. d! R" X5 w0 r" q3 @设置社团属性的实例:
路由器B配置如下:
: u$ I" n6 {% i# I. V0 w!
' x  H: Z5 ^5 Y  J3 C0 o' n( q; Zrouter bgp 200
# V, E4 ?( g  jnetwork 160.10.0.0
  Z* w; |# Q/ n# Z; [8 @' K' jneighbor 3.3.3.1 remote-as 300
% J. W) T  F0 T4 x2 Mneighbor 3.3.3.1 send-community
neighbor 3.3.3.1 route-map Aiko out
/ o+ S" m& t. e3 T& `  l0 y!
route-map Aiko permit 10
match ip address 1
set community no-advertise
!
route-map Aiko permit 20
match ip address 2
set community 100
!

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route-map Aiko permit 20
!
access-list 1 permit 160.10.0.0 255.255.0.0
9 T% E5 `7 [3 e# d% t) j  D2 T  faccess-list 2 permit 0.0.0.0 255.255.255.255
!
路由器C配置如下:
3 X- t; D; }( q3 h" w* @!
9 R: l: s# ^6 C' g# frouter bgp 300
: D. I/ Z- d$ Q/ f/ yneighbor 3.3.3.3 remote-as 200
neighbor 3.3.3.3 route-map Aiko in
8 `$ t) a* f* f# [3 E9 i!
8 x5 {: ^3 f" |5 rroute-map Aiko permit 10
* f0 E" X& Z8 Mmatch community 1 exact-match
set metric 100
!
route-map Aiko permit 20
match community 2
! f( Y. G8 j5 I!
9 N. c# q/ c/ p- n1 Vip community-list 1 permit 100
& g3 w4 j7 x: {' V7 `- J5 N' pip community-list 2 permit internet
!
Conditional Advertising
一些有选择性的宣告BGP路由的方法:
1.当主路由(primary map)状态出故障之后,才宣告辅助路由(secondary map):
' [* |6 N1 F. C5 Y8 tAiko(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:
6 S+ _( B% a. k; v9 L/ EAiko(config-router)#neighbor {ip-address} unsuppress-map {map-name}
8 c! x, O& q7 T5 t: [; l4 vMonitoring and Maintaining BGP Filtering

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一些辅助性的调试命令:
1 k8 S$ {/ T- u8 ?* }( ]3 ]3 \! x. k0 ^1.显示BGP表信息:
Aiko#show ip bgp
3 Q& a  {) }& m( V- Y2.显示BGP邻居信息:
( X  ?! a0 k. S3 BAiko#show ip bgp neighbors [ip-address]
3.显示被惩罚的BGP路由信息:
Aiko#show ip bgp dampened-paths
4.显示所有的BGP连接信息:
) `, z# a: b, G9 k2 vAiko#show ip bgp summary
5.清除BGP的路由惩罚:
* G8 |. m1 n) ?$ W; ^/ CAiko#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]