From: Joseph Rothstein (ziutek@mac.com)
Date: Wed Sep 15 2004 - 00:19:03 GMT-3
Greetings to all.
Has anyone else had reachability issues with the BGP part of Lab 2 int eh new Cisco Press book? I ahve a strange situation on R4 which prevents pinging the loopback 2.2.2.2 on R2:
R4#sipb
BGP table version is 5, local router ID is 10.4.4.4
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
*> 2.2.2.0/29 10.6.6.6 0 61555 62555 i
* 10.1.1.1 0 61555 62555 i
*> 4.4.4.0/24 0.0.0.0 0 32768 i
*> 5.5.5.0/27 10.6.6.6 0 61555 64555 i
* 10.1.1.1 0 61555 64555 i
*> 8.8.8.0/28 10.6.6.6 0 61555 63555 i
* 10.1.1.1 0 61555 63555 i
This basically causes packets to bounce back and forth between R6 and R4 since R6's BGP table uses 10.90.90.1 as it's next hop for 2.2.2.2, which goes through R4. So once the packet gets to R4 on its way to 10.90.90.1, it just goes right back to R6.
This seems like a pretty big problem, although the text does not state that IP addresses under BGP have to be reachable.
Did anyone else run into this little problem?
Joe
There is more to life than increasing its speed. - Mahatma Ghandi
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