CCIE路由实验(4)
1.过滤BGP路由的方法2.用AS-path filter控制路由
3.用Community Filter控制路由
enable
conf t
no ip do lo
enable pass cisco
line con 0
logg sync
exec-t 0 0
exit
line vty 0 4
pass cisco
logg sync
exit
host
1.过滤BGP路由的方法
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多种过滤BGP路由的方法：
直接调用前缀列表过滤路由，neighbor x.x.x.x prefix-list xx
用Distribute-list 加前缀或访问控制列表过滤
针对某个邻居：nenighbor x.x.x.x distribute-list + 前缀/访问列表
针对所有邻居：distribute-list + 前缀/访问列表
用route-map过滤，neighbor x.x.x.x route-map
每种过滤的方法都可以用于in和out两个方向。
http://www.iyunv.com/thlzhf/p/data:image/png;base64,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
R1:
int f0/0
ip add 12.1.1.1 255.255.255.0
no shut
exit
int f1/0
ip add 14.1.1.1 255.255.255.0
no shut
exit
int f2/0
ip add 13.1.1.1 255.255.255.0
no shut
exit
router bgp 100
bgp router-id 11.1.1.1
neighbor 12.1.1.2 remote-as 200
neighbor 13.1.1.3 remote-as 300
neighbor 14.1.1.4 remote-as 400
exit
R2:
int f0/0
ip add 12.1.1.2 255.255.255.0
no shut
exit
router bgp 200
bgp router-id 22.1.1.1
neighbor 12.1.1.1 remote-as 100
exit
R3:
int f0/0
ip add 13.1.1.3 255.255.255.0
no shut
exit
router bgp 300
bgp router-id 33.1.1.1
neighbor 13.1.1.1 remote-as 100
exit
R4:
int f0/0
ip add 14.1.1.4 255.255.255.0
no shut
exit
router bgp 400
bgp router-id 44.1.1.1
neighbor 14.1.1.1 remote-as 100
exit
R2:
int l0
ip add 100.1.0.1 255.255.255.0
exit
int l1
ip add 100.1.1.1 255.255.255.0
exit
int l2
ip add 100.1.2.1 255.255.255.0
exit
int l3
ip add 100.1.3.1 255.255.255.0
exit
router bgp 200
network 100.1.0.0 mask 255.255.255.0
network 100.1.1.0 mask 255.255.255.0
network 100.1.2.0 mask 255.255.255.0
network 100.1.3.0 mask 255.255.255.0
exit
R3:
int l0
ip add 100.1.0.1 255.255.255.128
exit
int l1
ip add 100.1.1.1 255.255.255.128
exit
int l2
ip add 100.1.2.1 255.255.255.128
exit
int l3
ip add 100.1.3.1 255.255.255.128
exit
router bgp 300
network 100.1.0.0 mask 255.255.255.128
network 100.1.1.0 mask 255.255.255.128
network 100.1.2.0 mask 255.255.255.128
network 100.1.3.0 mask 255.255.255.128
exit
R4:
int l0
ip add 100.1.0.1 255.255.255.192
exit
int l1
ip add 100.1.1.1 255.255.255.192
exit
int l2
ip add 100.1.2.1 255.255.255.192
exit
int l3
ip add 100.1.3.1 255.255.255.192
exit
router bgp 300
network 100.1.0.0 mask 255.255.255.192
network 100.1.1.0 mask 255.255.255.192
network 100.1.2.0 mask 255.255.255.192
network 100.1.3.0 mask 255.255.255.192
exit
R1:
show ip bgp
-------------------------------------------------------------------
R1:
ip prefix-list yeslab deny 100.1.0.0/22 ge 24 le 24
/22表示要匹配前缀100.1.0.0的前22位，而第23位和24位可以任意值。
当没有配置ge和le，表示掩码长度等于/length
当配置了ge，没有配置le，表示掩码长度大于等于ge-length，小于等于32
当没有配置ge，但配置了le，表示掩码长度大于等于network-length，小于等于le-length
当同时配置了ge和le，表示前缀长度大于等于ge-length，小于等于le-length
router bgp 100
neighbor 12.1.1.2 prefix-list yeslab in
exit
clear ip bgp * soft in
show ip bgp
------------------------------------------------------------------
R1:
router bgp 100
no neighbor 12.1.1.2 prefix-list yeslab in
distribute-list prefix yeslab in
exit
clear ip bgp * soft in
show ip bgp
------------------------------------------------------------------
R1:
access-list 100 deny ip 100.1.0.0 0.0.3.0 host 255.255.255.0
access-list permit ip any any
以上host前面部分匹配前缀，后面部分匹配掩码长度
router bgp 100
no distribute-list prefix yeslab in
distribute-list 100 in
exit
clear ip bgp * soft in
show ip bgp
---------------------------------------------------------------------
R1:
router bgp 100
no distribute-list 100 in
neighbor 12.1.1.2 distribute-list 100 in
exit
clear ip bgp * soft in
show ip bgp
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