I have a problem setting up a GNS lab for the BGP tunnel over MPLS . I attached the topology and the config files so you can understand the issue .
The used IGP is IS-IS on R2,3 & 4 .
MPLS is applied on R2,3 & 4 .
BGP is applied on CE's and PE's (R1,2,4,5)
I am using 7200 Software (C7200-ADVENTERPRISEK9-M), Version 12.4(24)T for all routers CE , P , PE's . Also I tried 3k an 3K router with the same output .
Below is the bgp output of PE2 (R4) :
PE2# sh ip bgp BGP table version is 6, local router ID is 184.108.40.206 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 *>i220.127.116.11/32 18.104.22.168 0 100 0 2 i r>i22.214.171.124/32 126.96.36.199 0 100 0 i *> 188.8.131.52/32 0.0.0.0 0 32768 i *> 184.108.40.206/32 10.4.5.2 0 0 1 i
Same for the PE1 (R2) :
PE1#sh ip bgp BGP table version is 6, local router ID is 220.127.116.11 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 *> 18.104.22.168/32 10.1.2.1 0 0 2 i *> 22.214.171.124/32 0.0.0.0 0 32768 i r>i126.96.36.199/32 188.8.131.52 0 100 0 i *>i184.108.40.206/32 220.127.116.11 0 100 0 1 i
So router R4 can't choose a path to R2 and vice versa .
you are getting the RIB-failure error because the 18.104.22.168 and 22.214.171.124 routes are also being carried by ISIS and it has a better administrative distance than ibgp so the ISIS route gets installed in the routing table.
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