Configuring IBGP and EBGP Sessions, Local Preference and MED

简介:

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ISP#show run 
Building configuration... 

Current configuration : 1476 bytes 

version 12.4 
service timestamps debug datetime msec 
service timestamps log datetime msec 
no service password-encryption 

hostname ISP 

boot-start-marker 
boot-end-marker 


no aaa new-model 


ip cef 
no ip domain lookup 

interface Loopback0 
ip address 192.168.100.1 255.255.255.0 

interface FastEthernet0/0 
no ip address 
shutdown 
duplex half 

interface Serial1/0 
ip address 192.168.1.5 255.255.255.252 
serial restart-delay 0 

interface Serial1/1 
ip address 192.168.1.1 255.255.255.252 
serial restart-delay 0 


router bgp 200 
no synchronization 
bgp log-neighbor-changes 
network 192.168.1.0 mask 255.255.255.252 
network 192.168.1.4 mask 255.255.255.252 
network 192.168.100.0 
neighbor 192.168.1.2 remote-as 64512 
neighbor 192.168.1.6 remote-as 64512 
no auto-summary 


no ip http server 
no ip http secure-server 

control-plane 

gatekeeper 
shutdown  


line con 0 
exec-timeout 0 0 
logging synchronous 
stopbits 1 
line aux 0 
stopbits 1 
line vty 0 4 


end 

Sanjose1# show run 
Building configuration... 

Current configuration : 1788 bytes 

version 12.4 
service timestamps debug datetime msec 
service timestamps log datetime msec 
no service password-encryption 

hostname Sanjose1 

boot-start-marker 
boot-end-marker 


no aaa new-model 


ip cef 
no ip domain lookup 

interface Loopback0 
ip address 172.16.64.1 255.255.255.0 

interface FastEthernet0/0 
no ip address 
shutdown 
duplex half 

interface Serial1/0 
ip address 192.168.1.6 255.255.255.252 
serial restart-delay 0 

interface Serial1/1 
ip address 172.16.1.1 255.255.255.0 
serial restart-delay 0 


router eigrp 64512 
network 172.16.0.0 
no auto-summary 

router bgp 64512 
no synchronization 
bgp log-neighbor-changes 
network 172.16.0.0 
neighbor 172.16.32.1 remote-as 64512 
neighbor 172.16.32.1 update-source Loopback0 
neighbor 172.16.32.1 next-hop-self 
neighbor 192.168.1.5 remote-as 200 
neighbor 192.168.1.5 route-map zhang in 
neighbor 192.168.1.5 route-map zhang-out out 
no auto-summary 

ip default-network 192.168.100.0               默认路由 
ip route 172.16.0.0 255.255.0.0 Null0          路由汇总到null0 

no ip http server 
no ip http secure-server 

route-map zhang-out permit 10 
set metric 50 

route-map zhang permit 10 
set local-preference 150 

control-plane 

gatekeeper 
shutdown 


line con 0 
exec-timeout 0 0 
logging synchronous 
stopbits 1 
line aux 0 
stopbits 1 
line vty 0 4 


end 


Sanjose2# show run 
Building configuration... 

Current configuration : 1749 bytes 

version 12.4 
service timestamps debug datetime msec 
service timestamps log datetime msec 
no service password-encryption 

hostname Sanjose2     路由器名 Sanjose2 

boot-start-marker 
boot-end-marker 


no aaa new-model 


ip cef 
no ip domain lookup 

interface Loopback0 
ip address 172.16.32.1 255.255.255.0 

interface FastEthernet0/0 
no ip address 
shutdown 
duplex half 

interface Serial1/0 
ip address 172.16.1.2 255.255.255.252 
serial restart-delay 0 

interface Serial1/1 
ip address 192.168.1.2 255.255.255.252 
serial restart-delay 0 


router eigrp 64512             配置eigrp 64512 
network 172.16.0.0 
no auto-summary 

router bgp 64512               启动bgp 64512 
no synchronization 
bgp log-neighbor-changes 
network 172.16.0.0 
neighbor 172.16.64.1 remote-as 64512               
neighbor 172.16.64.1 update-source Loopback0   更新源 lo0 
neighbor 172.16.64.1 next-hop-self 
neighbor 192.168.1.1 remote-as 200          
neighbor 192.168.1.1 route-map yun in         应用路由策略 
neighbor 192.168.1.1 route-map yun-out out    应用路由策略 
no auto-summary 

ip route 172.16.0.0 255.255.0.0 Null0         路由汇总到 null0 

no ip http server 
no ip http secure-server 

route-map yun-out permit 10                   路由策略 permit 10 
set metric 75                                设置metric值 75 

route-map yun permit 10 
set local-preference 125 

control-plane 


gatekeeper 
shutdown 


line con 0 
exec-timeout 0 0 
logging synchronous 
stopbits 1 
line aux 0 
stopbits 1 
line vty 0 4 
!          

end 


Sanjose2#show ip bgp 
BGP table version is 14, local router ID is 172.16.32.1 
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, 
             r RIB-failure, S Stale 
Origin codes: i - IGP, e - EGP, ? - incomplete 

  Network          Next Hop            Metric LocPrf Weight Path 
*> 172.16.0.0       0.0.0.0                  0         32768 i 
* i                 172.16.64.1              0    100      0 i 
r>i192.168.1.0/30   172.16.64.1              0    150      0 200 i 
r                   192.168.1.1              0    125      0 200 i 
*>i192.168.1.4/30   172.16.64.1              0    150      0 200 i 
*                   192.168.1.1              0    125      0 200 i 
*>i192.168.100.0    172.16.64.1              0    150      0 200 i 
*                   192.168.1.1              0    125      0 200  


ISP#show ip bgp  
BGP table version is 7, local router ID is 192.168.100.1 
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, 
             r RIB-failure, S Stale 
Origin codes: i - IGP, e - EGP, ? - incomplete 

  Network          Next Hop            Metric LocPrf Weight Path 
*  172.16.0.0       192.168.1.2             75             0 64512 i 
*>                  192.168.1.6             50             0 64512 i 
*> 192.168.1.0/30   0.0.0.0                  0         32768 i 
*> 192.168.1.4/30   0.0.0.0                  0         32768 i 
*> 192.168.100.0    0.0.0.0                  0         32768 i 





ISP#tclsh 
ISP(tcl)#foreach address { 
+>192.168.100.1 
+>172.16.64.1 
+>172.16.32.1 
+>192.168.1.1 
+>192.168.1.2 
+>192.168.1.5 
+>192.168.1.6 
+>172.16.1.1 
+>172.16.1.2 
+>} { 
+>ping $address } 

Type escape sequence to abort. 
Sending 5, 100-byte ICMP Echos to 192.168.100.1, timeout is 2 seconds: 
!!!!! 
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms 
Type escape sequence to abort. 
Sending 5, 100-byte ICMP Echos to 172.16.64.1, timeout is 2 seconds: 
!!!!! 
Success rate is 100 percent (5/5), round-trip min/avg/max = 12/62/164 ms 
Type escape sequence to abort. 
Sending 5, 100-byte ICMP Echos to 172.16.32.1, timeout is 2 seconds: 
!!!!! 
Success rate is 100 percent (5/5), round-trip min/avg/max = 12/44/108 ms 
Type escape sequence to abort. 
Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds: 
!!!!! 
Success rate is 100 percent (5/5), round-trip min/avg/max = 12/32/72 ms 
Type escape sequence to abort. 
Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds: 
!!!!! 
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/32/68 ms 
Type escape sequence to abort. 
Sending 5, 100-byte ICMP Echos to 192.168.1.5, timeout is 2 seconds: 
!!!!! 
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/36/68 ms 
Type escape sequence to abort. 
Sending 5, 100-byte ICMP Echos to 192.168.1.6, timeout is 2 seconds: 
!!!!! 
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/31/64 ms 
Type escape sequence to abort. 
Sending 5, 100-byte ICMP Echos to 172.16.1.1, timeout is 2 seconds: 
!!!!! 
Success rate is 100 percent (5/5), round-trip min/avg/max = 32/60/108 ms 
Type escape sequence to abort. 
Sending 5, 100-byte ICMP Echos to 172.16.1.2, timeout is 2 seconds: 
!!!!! 
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/72/176 ms 
ISP(tcl)#tclquit 
















本文转自zhang25yun51CTO博客,原文链接:http://blog.51cto.com/1585654/1402031 ,如需转载请自行联系原作者




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