4.3- RIB Failure??


Here is the configs according to SG.

Rack1R1#sh run | beg bgp
router bgp 300
 no synchronization
 bgp log-neighbor-changes
 neighbor remote-as 200
 neighbor remote-as 200
 neighbor remote-as 300
 neighbor default-originate
 neighbor prefix-list DEFAULT out
 no auto-summary
ip prefix-list DEFAULT seq 5 permit

Here is the output in SW2.

Rack1SW2#sh ip bgp
BGP table version is 12, local router ID is
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
r>i0.0.0.0               0    100      0 i


any help will be great.







  • It has been a while since I worked this lab...Is SW2 learning a default route from another routing protocol (possibly with a lower AD)? 

    Issue the sh ip bgp rib-failure command and see if it aids you any in determining the cause.


  • Hello,


    the rib failure is happening because SW2 has another default route coming from R3 (Ref Task 3.10). Task 3.10 states that R3 should send a default route into the OSPF domain. Sw2 will have two default routes;

    1. From OSPF with an AD of 110

    2. From BGP with an AD of 200 since it's from an iBGP peer

    One think we can do to use the BGP default instead of the OSPF one, is to change the AD od iBGP routes to let's say 109.


    I think the workbook missed that point. 

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