From: Spicer, Troy (SpicerT@xxxxxxxxxxxx)
Date: Wed Jul 12 2000 - 21:05:30 GMT-3
Title: BGP Sync Problem
The last 5 routes in the BGP table below are being learned via IBGP
from a router on the other side of the AS. However, these routes are
not synced, despite what appears to be the appropriate routes in the
routing table. (FYI The 32 bit addresses are loopbacks and the
103.0.0.0 was redistributed into bgp and ospf from RIP) There is
full ping connectivity between all addresses.
If I put in a static route to the next hop or null0 the route becomes
synchronized and are advertised to an EBGP neighbor (ip route
103.0.0.0 255.0.0.0 or ip route 154.1.1.1 255.255.255.255 ).
(Below 154.1.1.1 is currently synced because I have added a static
route. (151,152,153 are essentially identical to 154 other than
that.)
I'm assuming that IA and E2 areas are not good enough to sync. I
just added a 155.1.1.1 in the same area as this router and it syncs up
without a problem. Can anyone confirm?
Given a BGP table of
BGP table version is 7, local router ID is 40.1.1.1
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
*> 20.1.1.0/24 0.0.0.0 0 32768 ?
*>i103.0.0.0 30.1.1.4 1 100 0 6000 e
<-no sync
*>i151.1.1.1/32 30.1.1.4 0 100 0 i <-no
sync
*>i152.1.1.1/32 30.1.1.4 0 100 0 i <-no
sync
*>i153.1.1.1/32 30.1.1.4 0 100 0 i <-no
sync
*>i154.1.1.1/32 30.1.1.4 0 100 0 i
<-synced static route added
*>i155.1.1.1/32 20.1.1.2 0 100 0 i
<-synced same ospf area
Given a routing table of
Gateway of last resort is not set
O E2 103.0.0.0/8 [110/20] via 20.1.1.5, 00:04:39, Serial0
151.1.0.0/32 is subnetted, 1 subnets
O IA 151.1.1.1 [110/139] via 20.1.1.2, 00:04:39, Serial0
153.1.0.0/32 is subnetted, 1 subnets
O IA 153.1.1.1 [110/139] via 20.1.1.2, 00:04:40, Serial0
152.1.0.0/32 is subnetted, 1 subnets
O IA 152.1.1.1 [110/139] via 20.1.1.2, 00:04:40, Serial0
154.1.0.0/32 is subnetted, 1 subnets
S 154.1.1.1 [1/0] via 20.1.1.2
155.1.0.0/32 is subnetted, 1 subnets
O 155.1.1.1 [110/65] via 20.1.1.2, 00:05:15, Serial0
10.0.0.0/24 is subnetted, 1 subnets
O IA 10.1.1.0 [110/74] via 20.1.1.2, 00:04:39, Serial0
20.0.0.0/24 is subnetted, 1 subnets
C 20.1.1.0 is directly connected, Serial0
30.0.0.0/24 is subnetted, 1 subnets
O IA 30.1.1.0 [110/138] via 20.1.1.2, 00:04:39, Serial0
40.0.0.0/24 is subnetted, 1 subnets
C 40.1.1.0 is directly connected, Ethernet0
50.0.0.0/32 is subnetted, 1 subnets
O IA 50.1.1.1 [110/65] via 20.1.1.2, 00:04:39, Serial0
O IA 200.1.1.0/24 [110/139] via 20.1.1.2, 00:04:40, Serial0
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