06-03-2015 10:40 AM
Dear Engineers
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 4.4.4.4
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
*>i1.1.1.1/32 2.2.2.2 0 100 0 2 i
r>i2.2.2.2/32 2.2.2.2 0 100 0 i
*> 4.4.4.4/32 0.0.0.0 0 32768 i
*> 5.5.5.5/32 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 2.2.2.2
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
*> 1.1.1.1/32 10.1.2.1 0 0 2 i
*> 2.2.2.2/32 0.0.0.0 0 32768 i
r>i4.4.4.4/32 4.4.4.4 0 100 0 i
*>i5.5.5.5/32 4.4.4.4 0 100 0 1 i
So router R4 can't choose a path to R2 and vice versa .
Thanks .
06-03-2015 06:54 PM
you are getting the RIB-failure error because the 2.2.2.2 and 4.4.4.4 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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