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samsam_wang
Beginner

BGP RIP Failure, it is normal or not?

R1 e0-----e0 R2

R1

loop0 192.168.10.1/24

e0 192.168.1.1/24

R2

e0 192.168.1.2/24

Run RIP between R1 and R2, R2 can get the route 192.168.10.0/24 via RIP, the default AD is 120.

run iBGP between R1 and R2, R1 advitise loop0 into BGP, and R2 got BGP route 192.168.10.0 like

r>i 192.168.10.0/24

there is a 'r' because the AD of RIP(120) is less then the AD of IBGP(200), it is normal or not?

after I changed AD of RIP on R2 to 205, everything is ok, it is necessary?

R1 and R2 are 2500, IOS is c2500-is-l.122-15.T12.bin,

Thanks

3 REPLIES 3
Harold Ritter
Cisco Employee

This is indeed normal. This just means that BGP couldn't installed the route in the RIB cause another route is already installed with a better admin distance. This wouldn't prevent the route to be advertised to eBGP peers.

Hope this helps,

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México

Thanks a lot.

I want to ask one more question.

topology like

ospf area 0--R1---area 1---R2---area 2---R3

.......................R1--non-ospf--R2

Between R1 and R2, there are two links. one run OSPF, another run RIP or EIGRP or ISIS, R1 and R2 build virtual-link, if the link of area 1 broken, how R3 reach area 0 without static route?

Thanks

The virtual link will not stay up R1 and R2 don't see each other via area 1.

Hope this helps.

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México