From: Ilya Mazhara (willy@xxxxxxxxxxxxxxxx)
Date: Wed Feb 14 2001 - 06:27:08 GMT-3
Hi all!
I'm plaing with Fatkid 501 Lab (expert redistribution) but my point of
misundestanding at
OSPF backbone network summarization process.
Well see the pic:
Lo0(area3)/170.10.5---R4--area2/170.10.128/26---R5---FR-ptm/area
0/170.10.7/28--..FR spokes
R4 is ABR/ASBR with RIP/IGRP/OSPF mutual redistribution.
R5 is backbone ABR, which should make summarization of 170.10.7/24.
On the router R5:
!
interface Ethernet0/0
ip address 170.10.128.1 255.255.255.192
half-duplex
!
interface Serial0/0
bandwidth 125
ip address 170.10.7.1 255.255.255.240
ip directed-broadcast
encapsulation frame-relay
ip ospf network point-to-multipoint
no ip mroute-cache
no fair-queue
!
router ospf 1
router-id 170.10.9.1
log-adjacency-changes
area 0 range 170.10.7.0 255.255.255.0 cost 5 (!!!)
area 2 range 170.10.128.0 255.255.255.0
area 2 virtual-link 170.10.5.1
network 170.10.7.0 0.0.0.255 area 0
network 170.10.9.0 0.0.0.255 area 2
network 170.10.128.0 0.0.0.63 area 2
There're net 170.10.7/24 summaries at OSPF database:
Router5#sh ip osp da sum 170.10.7.0
OSPF Router with ID (170.10.9.1) (Process ID 1)
Summary Net Link States (Area 2)
LS age: 1485
Options: (No TOS-capability, DC, Upward)
LS Type: Summary Links(Network)
Link State ID: 170.10.7.0 (summary Network Number)
Advertising Router: 170.10.9.1 (! itself loopback)
LS Seq Number: 80000023
Checksum: 0x712A
Length: 28
Network Mask: /24
TOS: 0 Metric: 5
But its cannot be injected in routing table:
On R5 : C 170.10.7.0/28 is directly connected, Serial0/0
And on other routers, for example, R4 only more specific routes:
O 170.10.7.1/32 [110/10] via 170.10.128.1, 00:08:47, Ethernet0/0
O 170.10.7.0/28 [110/2372] via 170.10.128.1, 00:08:47, Ethernet0/0
O 170.10.9.0/24 [110/11] via 170.10.128.1, 00:08:47, Ethernet0/0
Advice?
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