From: gladston@br.ibm.com
Date: Thu Oct 07 2004 - 10:33:49 GMT-3
Not BGP specialist, but let me try.
============
quoted
network x.x.x.x is
not advertised to BGP peers by this command, even if x.x.x.x has an exact
match in our routing table. Correct ?
============
R2 receives the route from R5 via ISIS and from R4 via eBGP
R2 is configured with "network 172.16.55.0 mas 255.255.255.0 back"
R2 sends the route to R1 via iBGP
R2 sends the route to R1 if changed to eBGP
r2#sh isis database det | i IP 172.16.55.0 255.255.255.0
Metric: 10 IP 172.16.55.0 255.255.255.0
r2#sir | i 172.16.55.0
B 172.16.55.0/24 [20/20] via 172.16.24.4, 1d00h
r2#sh run | b router bgp
router bgp 24
no synchronization
network 172.16.55.0 backdoor
neighbor 172.16.12.1 remote-as 24
neighbor 172.16.24.4 remote-as 4
no auto-summary
The route is advertised to iBGP neigh:
r1#sb
Network Next Hop Metric LocPrf Weight Path
*>i172.16.55.0/24 172.16.24.4 20 100 0 4 i
The route is advertised to eBGP neigh:
r1#sb
Network Next Hop Metric LocPrf Weight Path
*> 172.16.55.0/24 172.16.12.2 0 24 4 i
Version tested is 12.2(1d).
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But what will happen in the following situation:
router eigrp 1
network x.x.x.x
router bgp 65000
network x.x.x.x backdoor
redistribute eigrp 1
neighbor y.y.y.y remote-as 65100
Will network x.x.x.x be advertised to AS65100 by the redistribute command ??
Or will the backdoor command prevent this ?? Will the backdoor command only
work on received routes from AS65100 ???
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This archive was generated by hypermail 2.1.4 : Sat Nov 06 2004 - 17:11:44 GMT-3