From: Dillon Yang (gzdillon@hotmail.com)
Date: Thu Mar 10 2005 - 02:08:39 GMT-3
Hi, folks:
There is a router-id mistake in BGP_NON_SYNC.
The topology works well under BGP_NON_SYNC.
Now, it does not work under BGP_SYNC.
Why?
TIA
dillon
========================BGP synchronization====================
***************************************************
Changing Router to 3.3.1.1
3.3.1.1#s ip bgp
BGP table version is 10, local router ID is 3.3.1.1
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
r>i197.68.1.0 3.3.2.2 100 0 4 254 i
r>i197.68.4.0 3.3.2.2 100 0 4 254 i
r>i197.68.5.0 3.3.2.2 100 0 4 254 i
*> 200.200.200.0 0.0.0.0 0 32768 i
r>i200.200.201.0 3.3.5.5 0 100 0 6 i
3.3.1.1#s ip bgp 197.68.1.0
BGP routing table entry for 197.68.1.0/24, version 8
Paths: (1 available, best #1, table Default-IP-Routing-Table, RIB-failure(17))
Advertised to non peer-group peers:
3.3.5.5
4 254, (Received from a RR-client)
3.3.2.2 (metric 801) from 3.3.2.2 (3.3.2.2)
Origin IGP, localpref 100, valid, internal, synchronized, best
3.3.1.1#s ip route 197.68.1.0
Routing entry for 197.68.1.0/24
Known via "ospf 73", distance 110, metric 2000
Tag 4, type extern 2, forward metric 800
Last update from 3.3.125.2 on Serial0, 00:30:20 ago
Routing Descriptor Blocks:
* 3.3.125.2, from 3.3.2.2, 00:30:20 ago, via Serial0
Route metric is 2000, traffic share count is 1
3.3.1.1#s ip bgp 200.200.201.0
BGP routing table entry for 200.200.201.0/24, version 4
Paths: (1 available, best #1, table Default-IP-Routing-Table, RIB-failure(17))
Advertised to non peer-group peers:
3.3.2.2
6, (Received from a RR-client)
3.3.5.5 (metric 801) from 3.3.5.5 (3.3.5.5)
Origin IGP, metric 0, localpref 100, valid, internal, synchronized, best
3.3.1.1#s ip route 200.200.201.0
Routing entry for 200.200.201.0/24
Known via "ospf 73", distance 110, metric 2000
Tag 6, type extern 2, forward metric 800
Last update from 3.3.125.5 on Serial0, 00:30:25 ago
Routing Descriptor Blocks:
* 3.3.125.5, from 3.3.5.5, 00:30:25 ago, via Serial0
Route metric is 2000, traffic share count is 1
***************************************************
Changing Router to 3.3.2.2
3.3.2.2#s ip bgp
BGP table version is 5, local router ID is 3.3.2.2
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
*> 197.68.1.0 3.3.4.4 0 4 254 i
*> 197.68.4.0 3.3.4.4 0 4 254 i
*> 197.68.5.0 3.3.4.4 0 4 254 i
*>i200.200.200.0 3.3.1.1 0 100 0 i
* i200.200.201.0 3.3.5.5 0 100 0 6 i
3.3.2.2#s ip bgp 197.68.1.0
BGP routing table entry for 197.68.1.0/24, version 2
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Advertised to non peer-group peers:
3.3.1.1
4 254
3.3.4.4 (metric 1) from 3.3.4.4 (3.3.4.4)
Origin IGP, localpref 100, valid, external, best
3.3.2.2#s ip route 197.68.1.0
Routing entry for 197.68.1.0/24
Known via "bgp 3", distance 20, metric 0
Tag 4, type external
Redistributing via ospf 73
Advertised by ospf 73 metric 2000 subnets
Last update from 3.3.4.4 00:30:22 ago
Routing Descriptor Blocks:
* 3.3.4.4, from 3.3.4.4, 00:30:22 ago
Route metric is 0, traffic share count is 1
AS Hops 2
3.3.2.2#s ip bgp 200.200.201.0
BGP routing table entry for 200.200.201.0/24, version 0
Paths: (1 available, no best path)
Not advertised to any peer
6
3.3.5.5 (metric 801) from 3.3.1.1 (3.3.1.1)
Origin IGP, metric 0, localpref 100, valid, internal, not synchronized
Originator: 3.3.5.5, Cluster list: 3.3.1.1
3.3.2.2#s ip route 200.200.201.0
Routing entry for 200.200.201.0/24
Known via "ospf 73", distance 110, metric 2000
Tag 6, type extern 2, forward metric 800
Redistributing via rip
Advertised by rip metric 9
Last update from 3.3.125.5 on Serial0, 00:30:27 ago
Routing Descriptor Blocks:
* 3.3.125.5, from 3.3.5.5, 00:30:27 ago, via Serial0
Route metric is 2000, traffic share count is 1
***************************************************
Changing Router to 3.3.5.5
3.3.5.5#s ip bgp
BGP table version is 4, local router ID is 3.3.5.5
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
* i197.68.1.0 3.3.2.2 100 0 4 254 i
* i197.68.4.0 3.3.2.2 100 0 4 254 i
* i197.68.5.0 3.3.2.2 100 0 4 254 i
r>i200.200.200.0 3.3.1.1 0 100 0 i
*> 200.200.201.0 3.3.6.6 0 0 6 i
3.3.5.5#s ip bgp 197.68.1.0
BGP routing table entry for 197.68.1.0/24, version 0
Paths: (1 available, no best path)
Not advertised to any peer
4 254
3.3.2.2 (metric 801) from 3.3.1.1 (3.3.1.1)
Origin IGP, localpref 100, valid, internal, not synchronized
Originator: 3.3.2.2, Cluster list: 3.3.1.1
3.3.5.5#s ip route 197.68.1.0
Routing entry for 197.68.1.0/24
Known via "ospf 73", distance 110, metric 2000
Tag 4, type extern 2, forward metric 800
Redistributing via eigrp 100
Advertised by eigrp 100 metric 100 100 255 1 1500
Last update from 3.3.125.2 on Serial0, 00:30:25 ago
Routing Descriptor Blocks:
* 3.3.125.2, from 3.3.2.2, 00:30:25 ago, via Serial0
Route metric is 2000, traffic share count is 1
3.3.5.5#s ip bgp 200.200.201.0
BGP routing table entry for 200.200.201.0/24, version 3
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Advertised to non peer-group peers:
3.3.1.1
6
3.3.6.6 (metric 409600) from 3.3.6.6 (3.3.6.6)
Origin IGP, metric 0, localpref 100, valid, external, best
3.3.5.5#s ip route 200.200.201.0
Routing entry for 200.200.201.0/24
Known via "bgp 3", distance 20, metric 0
Tag 6, type external
Redistributing via ospf 73
Advertised by ospf 73 metric 2000 subnets
Last update from 3.3.6.6 00:30:30 ago
Routing Descriptor Blocks:
* 3.3.6.6, from 3.3.6.6, 00:30:30 ago
Route metric is 0, traffic share count is 1
AS Hops 1
========================BGP synchronization====================
----- Original Message -----
From: "Dillon Yang" <gzdillon@hotmail.com>
To: "Group Study" <ccielab@groupstudy.com>
Sent: Wednesday, March 09, 2005 9:15 PM
Subject: BGP reflector Non-directed client
> Hi, folks:
>
> In a case, the topology is :
>
> R1(reflector)
> |
> FR
> |
> R5(Hub)----------R6(AS6)
> |
> FR
> |
> R2---------------R4(AS4)
>
> R1, R2, R5 are in AS 3, The R2 and R5 can not receive external routes from R1. Why?
>
> TIA
> dillon
>
>
> ***************************************************
> Changing Router to 3.3.1.1
> r1#s ip bgp
> BGP table version is 10, local router ID is 3.3.1.1
> 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
> r>i197.68.1.0 3.3.2.2 100 0 4 254 i
> r>i197.68.4.0 3.3.2.2 100 0 4 254 i
> r>i197.68.5.0 3.3.2.2 100 0 4 254 i
> *> 200.200.200.0 0.0.0.0 0 32768 i
> r>i200.200.201.0 3.3.5.5 0 100 0 6 i
>
> s ip bgp 197.68.1.0
> BGP routing table entry for 197.68.1.0/24, version 7
> Paths: (1 available, best #1, table Default-IP-Routing-Table, RIB-failure(17))
> Not advertised to any peer
> 4 254, (Received from a RR-client)
> 3.3.2.2 (metric 801) from 3.3.2.2 (3.3.2.2)
> Origin IGP, localpref 100, valid, internal, best
>
>
> s ip bgp 200.200.201.0
> BGP routing table entry for 200.200.201.0/24, version 3
> Paths: (1 available, best #1, table Default-IP-Routing-Table, RIB-failure(17))
> Not advertised to any peer
> 6, (Received from a RR-client)
> 3.3.5.5 (metric 801) from 3.3.5.5 (3.3.2.2)
> Origin IGP, metric 0, localpref 100, valid, internal, best
>
> r1#s ip os nei
>
> Neighbor ID Pri State Dead Time Address Interface
> 3.3.5.5 1 FULL/DR 00:01:53 3.3.125.5 Serial0
>
> s ip route | be Gateway
> Gateway of last resort is not set
>
> C 200.200.200.0/24 is directly connected, Loopback200
> O E2 200.200.201.0/24 [110/2000] via 3.3.125.5, 00:17:44, Serial0
> 3.0.0.0/24 is subnetted, 8 subnets
> C 3.3.1.0 is directly connected, Loopback0
> O 3.3.2.0 [110/801] via 3.3.125.2, 00:34:03, Serial0
> O E2 3.3.4.0 [110/5000] via 3.3.125.2, 00:34:03, Serial0
> O 3.3.5.0 [110/801] via 3.3.125.5, 00:34:03, Serial0
> O E2 3.3.6.0 [110/2000] via 3.3.125.5, 00:34:03, Serial0
> O E2 3.3.24.0 [110/4000] via 3.3.125.2, 00:34:03, Serial0
> O E2 3.3.56.0 [110/2000] via 3.3.125.5, 00:34:03, Serial0
> C 3.3.125.0 is directly connected, Serial0
> 4.0.0.0/24 is subnetted, 1 subnets
> O E2 4.4.4.0 [110/2000] via 3.3.125.5, 00:34:03, Serial0
> O E2 197.68.1.0/24 [110/2000] via 3.3.125.2, 00:17:26, Serial0
> O E2 197.68.5.0/24 [110/2000] via 3.3.125.2, 00:17:26, Serial0
> O E2 197.68.4.0/24 [110/2000] via 3.3.125.2, 00:17:26, Serial0
> O E2 192.3.2.0/24 [110/2000] via 3.3.125.5, 00:34:03, Serial0
> 150.100.0.0/24 is subnetted, 1 subnets
> O E2 150.100.2.0 [110/5000] via 3.3.125.2, 00:34:03, Serial0
>
>
> s run | be router bgp
> router bgp 3
> no synchronization
> bgp router-id 3.3.1.1
> bgp log-neighbor-changes
> network 200.200.200.0
> neighbor 3.3.2.2 remote-as 3
> neighbor 3.3.2.2 update-source Loopback0
> neighbor 3.3.2.2 route-reflector-client
> neighbor 3.3.5.5 remote-as 3
> neighbor 3.3.5.5 update-source Loopback0
> neighbor 3.3.5.5 route-reflector-client
> no auto-summary
>
> ***************************************************
> Changing Router to 3.3.2.2
> s ip bgp 197.68.1.0
> BGP routing table entry for 197.68.1.0/24, version 2
> Paths: (1 available, best #1, table Default-IP-Routing-Table)
> Advertised to non peer-group peers:
> 3.3.1.1
> 4 254
> 3.3.4.4 (metric 1) from 3.3.4.4 (3.3.4.4)
> Origin IGP, localpref 100, valid, external, best
>
>
> s ip bgp 200.200.201.0
>
> % Network not in table
> r2#s ip os nei
>
> Neighbor ID Pri State Dead Time Address Interface
> 3.3.5.5 1 FULL/DR 00:01:43 3.3.125.5 Serial0
> r2#
>
> s ip route | be Gateway
> Gateway of last resort is not set
>
> O E2 200.200.200.0/24 [110/2000] via 3.3.125.1, 00:30:36, Serial0
> O E2 200.200.201.0/24 [110/2000] via 3.3.125.5, 00:17:55, Serial0
> 3.0.0.0/24 is subnetted, 8 subnets
> O 3.3.1.0 [110/801] via 3.3.125.1, 00:30:36, Serial0
> C 3.3.2.0 is directly connected, Loopback0
> R 3.3.4.0 [120/1] via 3.3.24.4, 00:00:26, Serial1
> O 3.3.5.0 [110/801] via 3.3.125.5, 00:30:36, Serial0
> O E2 3.3.6.0 [110/2000] via 3.3.125.5, 00:30:36, Serial0
> C 3.3.24.0 is directly connected, Serial1
> O E2 3.3.56.0 [110/2000] via 3.3.125.5, 00:30:36, Serial0
> C 3.3.125.0 is directly connected, Serial0
> 4.0.0.0/24 is subnetted, 1 subnets
> O E2 4.4.4.0 [110/2000] via 3.3.125.5, 00:30:36, Serial0
> B 197.68.1.0/24 [20/0] via 3.3.4.4, 00:17:37
> B 197.68.5.0/24 [20/0] via 3.3.4.4, 00:17:37
> B 197.68.4.0/24 [20/0] via 3.3.4.4, 00:17:37
> O E2 192.3.2.0/24 [110/2000] via 3.3.125.5, 00:30:36, Serial0
> 150.100.0.0/24 is subnetted, 1 subnets
> R 150.100.2.0 [120/1] via 3.3.24.4, 00:00:26, Serial1
>
>
> s run | be router bgp
> router bgp 3
> no synchronization
> bgp router-id 3.3.2.2
> bgp log-neighbor-changes
> neighbor 3.3.1.1 remote-as 3
> neighbor 3.3.1.1 update-source Loopback0
> neighbor 3.3.1.1 next-hop-self
> neighbor 3.3.4.4 remote-as 4
> neighbor 3.3.4.4 ebgp-multihop 255
> neighbor 3.3.4.4 update-source Loopback0
> no auto-summary
> !
>
> ***************************************************
> Changing Router to 3.3.5.5
> s ip bgp 197.68.1.0
>
> % Network not in table
>
>
> s ip bgp 200.200.201.0
> BGP routing table entry for 200.200.201.0/24, version 2
> Paths: (1 available, best #1, table Default-IP-Routing-Table)
> Advertised to non peer-group peers:
> 3.3.1.1
> 6
> 3.3.6.6 (metric 409600) from 3.3.6.6 (3.3.6.6)
> Origin IGP, metric 0, localpref 100, valid, external, best
> r5#s ip os nei
>
> Neighbor ID Pri State Dead Time Address Interface
> 3.3.1.1 0 FULL/DROTHER 00:01:45 3.3.125.1 Serial0
> 3.3.2.2 0 FULL/DROTHER 00:01:45 3.3.125.2 Serial0
> r5#
>
>
> s ip route | be Gateway
> Gateway of last resort is not set
>
> O E2 200.200.200.0/24 [110/2000] via 3.3.125.1, 00:34:25, Serial0
> B 200.200.201.0/24 [20/0] via 3.3.6.6, 00:18:05
> 3.0.0.0/24 is subnetted, 8 subnets
> O 3.3.1.0 [110/801] via 3.3.125.1, 00:34:25, Serial0
> O 3.3.2.0 [110/801] via 3.3.125.2, 00:34:25, Serial0
> O E2 3.3.4.0 [110/5000] via 3.3.125.2, 00:34:25, Serial0
> C 3.3.5.0 is directly connected, Loopback0
> D 3.3.6.0 [90/409600] via 3.3.56.6, 00:36:21, Ethernet0
> O E2 3.3.24.0 [110/4000] via 3.3.125.2, 00:34:25, Serial0
> C 3.3.56.0 is directly connected, Ethernet0
> C 3.3.125.0 is directly connected, Serial0
> 4.0.0.0/24 is subnetted, 1 subnets
> D EX 4.4.4.0 [170/26163200] via 3.3.56.6, 00:36:21, Ethernet0
> O E2 197.68.1.0/24 [110/2000] via 3.3.125.2, 00:17:48, Serial0
> O E2 197.68.5.0/24 [110/2000] via 3.3.125.2, 00:17:48, Serial0
> O E2 197.68.4.0/24 [110/2000] via 3.3.125.2, 00:17:48, Serial0
> D 192.3.2.0/24 [90/2195456] via 3.3.56.6, 00:36:21, Ethernet0
> 150.100.0.0/24 is subnetted, 1 subnets
> O E2 150.100.2.0 [110/5000] via 3.3.125.2, 00:34:25, Serial0
>
>
> s run | be router bgp
> router bgp 3
> no synchronization
> bgp router-id 3.3.2.2
> bgp log-neighbor-changes
> neighbor 3.3.1.1 remote-as 3
> neighbor 3.3.1.1 update-source Loopback0
> neighbor 3.3.1.1 next-hop-self
> neighbor 3.3.6.6 remote-as 6
> neighbor 3.3.6.6 ebgp-multihop 255
> neighbor 3.3.6.6 update-source Loopback0
> no auto-summary
> end
> =====================End==================
>
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This archive was generated by hypermail 2.1.4 : Sun Apr 03 2005 - 17:56:44 GMT-3