BGP路由与核心路由表关系

1, Requirement description

　　This Testing need check MAIPU and CISCO BGP default-information orginate compatible with each other or not.

2, Testing topology

3, Testing configuration

　　MP3840:

　　interface loopback0

　　ip address 6.6.6.6 255.255.255.255

　　exit

　　interface fastethernet0

　　ip address 2.1.1.2 255.255.255.0

　　exit

　　router bgp 100

　　no auto-summary

　　no synchronization

　　redistribute static

　　neighbor 2.1.1.1 remote-as 100

　　default-information originate

　　exit

　　ip route 0.0.0.0 0.0.0.0 loopback0

　　CISCO7200:

　　interface FastEthernet1/0

　　ip address 2.1.1.1 255.255.255.0

　　duplex full

　　speed auto

　　router bgp 100

　　no synchronization

　　bgp log-neighbor-changes

　　neighbor 2.1.1.2 remote-as 100

　　no auto-summary

　　4, Test result:

　　On MAIPU 3840, due to this static routing already redistribute into BGP routing table, so :

　　MP3840#show ip bgp

　　BGP table version is 3, local router ID is 6.6.6.6

　　Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,

　　S Stale

　　Origin codes: i - IGP, e - EGP, ? - incomplete

　　Network Next Hop Metric LocPrf Weight Path

　　[S]*> 0.0.0.0/0 0.0.0.0 0 32768 ?

　　On CISCO router, MAIPU bgp neighbor use “default-information originate” , the default routing was announced to peer CISCO 7200.

　　CISCO7200#show ip bgp

　　BGP table version is 5, local router ID is 2.1.1.1

　　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

　　* I 0.0.0.0 2.1.1.2 0 100 0 ?

　　CISCO7200#

在这里，有一点我都忘记了，今天做这个测试报告正好复习一下，核心路由表和bgp路由表的关系，为什么show ip bgp 有路由条目，但是show ip route没有?

在路由器MP3840上面，bgp 100进程下面配置了default-information originate,那就必须把静态默认路由充分发进来。