From: Alex Paulino (Alex@xxxxxxxxx)
Date: Tue Apr 23 2002 - 13:20:20 GMT-3
Hi folks, sorry about this simple doubt, but, i just wanna some tips about ibgp
over synchronization environment.
R8 peer with R2 and receives: 200.2.2.0/24 from AS 2.
R7 peering R8 using synchronzation (AS87). R7 receives this route and place it
as valid route because in the R8 i have redistributed BGP command under ospf pr
ocess.
As ospf has Administrative distance equal 110, and iBGP equal 200, this route n
ever comes up from BGP in R7, if i put this route with administrative route > 2
00 in OSPF process, bgp cannot to put this route in your routing table.
I have tried to configure R7 to set distance to this route to 220 under osp pro
cess. After to do this, the R7 has the follow entry in osp table:
R7#sh ip route 200.2.2.0
Routing entry for 200.2.2.0/24
Known via "ospf 10", distance 220, metric 49
...
!
Note that the route now has the distance 220 and this routestill is over ospf a
nd it is not valid from BGP table:
R7#sh ip bgp
BGP table version is 42, local router ID is 200.87.87.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
* i200.2.2.0 138.1.8.8 0 100 0 2 i
*> 200.87.87.0 0.0.0.0 0 32768 i
Does exist some solution for to R7 places this route into bgp table or this ne
ver will happen?
thanks in advance.
alex
Follow my configuration...
R8)
router ospf 10
redistribute bgp 87 subnets
network 138.1.0.0 0.0.255.255 area 0
!
router bgp 87
neighbor 138.1.2.2 remote-as 2
neighbor 138.1.2.2 ebgp-multihop 15
neighbor 138.1.2.2 update-source Loopback0
neighbor 138.1.2.2 soft-reconfiguration inbound
neighbor 138.1.7.7 remote-as 87
neighbor 138.1.7.7 update-source Loopback0
neighbor 138.1.7.7 next-hop-self
neighbor 138.1.7.7 soft-reconfiguration inbound
!
R7)
router ospf 10
redistribute bgp 87 subnets
network 138.1.0.0 0.0.255.255 area 0
!
router bgp 87
neighbor 138.1.8.8 remote-as 87
neighbor 138.1.8.8 update-source Loopback0
neighbor 138.1.8.8 next-hop-self
neighbor 138.1.8.8 soft-reconfiguration inbound
!
Follow the shows without change the Administrative distance to 220 in R7 to 200
.2.2.0 route:
R7#sh ip bgp
BGP table version is 67, local router ID is 200.87.87.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*>i200.2.2.0 138.1.8.8 0 100 0 2 i
*> 200.87.87.0 0.0.0.0 0 32768 i
!
R7#sh ip route 200.2.2.0
Routing entry for 200.2.2.0/24
Known via "ospf 10", distance 110, metric 1
Tag 2, type extern 2, forward metric 48
Redistributing via ospf 10
Last update from 138.1.123.8 on Serial0/0.1, 00:16:12 ago
Routing Descriptor Blocks:
* 138.1.123.8, from 138.1.8.8, 00:16:12 ago, via Serial0/0.1
Route metric is 1, traffic share count is 1
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:58:17 GMT-3