[Netkit.users] bgp in/valid nexthop
robertopari a fastwebnet.it
Dom 14 Nov 2004 11:35:56 CET
Again about lab #6, I found out the following by telnetting bgpd on as20r1:
bgpd> show ip bgp scan
BGP scan is running
BGP scan interval is 60
Current BGP nexthop cache:
220.127.116.11 valid [IGP metric 0]
BGP connected route:
after adding a K or S route for 18.104.22.168/30, that nexthop becomes valid.
Same goes for as20r2. (Remember that by K and S route I refer to zebra
"show ip route").
So: as20r1 is able to ping lan B, but as20r2 is not, even if it has an
ibgp peering session with as20r1 and its "show ip route" shows "B>*
22.214.171.124/30 [200/0] via 126.96.36.199, eth1, 00:00:01". Nexthop is valid,
(188.8.131.52 valid [IGP metric 0]). So why do I need to make 184.108.40.206/30 a
K or S route in order to let as20r2 ping lan B?
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