From: Jarod Ahlgren (ahlgrenjm@gmail.com)
Date: Wed Mar 22 2006 - 14:42:20 GMT-3
Could it be the RID of the originator of the route....?????
On 3/21/06, Victor Cappuccio <cvictor@protokolgroup.com> wrote:
>
> Hello List, playing for a while the behavior of ip ospf network p2mp
>
> I found this on one off the routers
>
> Rack1R6#
> *Mar 30 19:15:22.377: RT: del 4.4.4.4/32 via 136.1.245.5, ospf metric
> [110/129]
> *Mar 30 19:15:22.377: RT: SET_LAST_RDB for 4.4.4.4/32
> OLD rdb: via 11.13.11.13
>
> *Mar 30 19:15:22.377: RT: SET_LAST_RDB for 4.4.4.4/32
> NEW rdb: via 136.1.245.4
>
> *Mar 30 19:15:22.377: RT: add 4.4.4.4/32 via 136.1.245.4, ospf metric
> [110/65]
> *Mar 30 19:15:22.377: RT: NET-RED 4.4.4.4/32
> *Mar 30 19:15:22.381: RT: del 136.1.245.4/32 via 136.1.245.5, ospf
> metric [110/128]
> *Mar 30 19:15:22.381: RT: SET_LAST_RDB for 136.1.245.4/32
> OLD rdb: via 11.13.11.13
>
> *Mar 30 19:15:22.381: RT: SET_LAST_RDB for 136.1.245.4/32
> NEW rdb: via 136.1.245.4
>
> *Mar 30 19:15:22.381: RT:
> Rack1R6#add 136.1.245.4/32 via 136.1.245.4, ospf metric [110/64]
> *Mar 30 19:15:22.381: RT: NET-RED 136.1.245.4/32
> Rack1R6#
>
> Rack1R6#show ip route
> Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> E1 - OSPF external type 1, E2 - OSPF external type 2
> i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS
> level-2
> ia - IS-IS inter area, * - candidate default, U - per-user static
> route
> o - ODR, P - periodic downloaded static route
>
> Gateway of last resort is not set
>
> 136.1.0.0/16 is variably subnetted, 5 subnets, 2 masks
> C 136.1.136.0/24 is directly connected, BVI1
> O 136.1.245.4/32 [110/64] via 136.1.245.4, 00:04:08, Serial0/0.245
> O 136.1.245.5/32 [110/64] via 136.1.245.5, 00:04:08, Serial0/0.245
> C 136.1.245.0/24 is directly connected, Serial0/0.245
> O 136.1.245.2/32 [110/128] via 136.1.245.5, 00:04:08, Serial0/0.245
> C 204.12.1.0/24 is directly connected, FastEthernet0/0.63
> 4.0.0.0/32 is subnetted, 1 subnets
> O 4.4.4.4 [110/65] via 136.1.245.4, 00:04:09, Serial0/0.245
> 6.0.0.0/32 is subnetted, 1 subnets
> C 6.6.6.6 is directly connected, Loopback0
> C 192.10.1.0/24 is directly connected, Serial0/0.1
>
> This is strange, if you look at the routing table for instance, looking
> for the network 4.4.4.4
> You can say ok, It does a reverse lookup to 136.1.245.4
>
> But now take a look at this output
>
> *Mar 30 19:15:22.381: RT: del 136.1.245.4/32 via 136.1.245.5, ospf
> metric [110/128]
> *Mar 30 19:15:22.381: RT: SET_LAST_RDB for 136.1.245.4/32
> OLD rdb: via 11.13.11.13
>
> Now, ok Where in the hell is that network??
> 11.13.11.13 ??
> Rack1R6#show ip route 11.13.11.13
> % Network not in table
> Rack1R6#
>
> ??
> Rack1R6#show ip ospf neighbor
>
> Neighbor ID Pri State Dead Time Address
> Interface
> 4.4.4.4 0 FULL/ - 00:01:41 136.1.245.4
> Serial0/0.245
> 5.5.5.5 0 FULL/ - 00:01:53 136.1.245.5
> Serial0/0.245
>
> C1700 Software (C1700-K9O3SY7-M), Version 12.4(2)T3
>
> Thanks for any information
> Victor.
>
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