From: Varghese Thomas (vnthomas3@hotmail.com)
Date: Tue Dec 02 2003 - 14:13:19 GMT-3
Hello,
I forgot to add the folowing
1. Tried ospf distance ext 115
2. tried distance 90 192.168.1.2 0.0.0.0
----- Original Message -----
From: Varghese Thomas
To: ccielab@groupstudy.com
Sent: Tuesday, December 02, 2003 10:58 AM
Subject: Dual OSPF Issue
Hello,
Need help on a dual OSPF issue.
Setup is as follows:
BB1 - 192.168.1.0/24 R1 - 10.2.2.0/24 R2 - 172.16.1.0/24 BB2
Requirement:
1. R1 & R2 should only pass default-route learned from BB1 & BB2
respectively
2. If BB1 stops sending default-route, R1 should have default-route from
BB2
via R2; vice vesa.
3. When all are working, both BB1 is sending external default-route, type
1.
BB1 & R1 is running OS process 64, R1 & R2 is running OSPF process 1; R2 &
BB2
is ruuning OSPF process 64.
R1's Config:
router ospf 1
log-adjacency-changes
network 10.2.2.0 0.0.0.255 area 0
default-information originate
!
router ospf 64
log-adjacency-changes
network 192.168.1.0 0.0.0.255 area 0
R2's config:
router ospf 1
log-adjacency-changes
network 10.2.2.0 0.0.0.255 area 0
default-information originate
!
router ospf 64
log-adjacency-changes
network 172.16.1.0 0.0.0.255 area 0
R1's RT
R1#sip | in 0.0.0.0
Gateway of last resort is 10.2.2.2 to network 0.0.0.0
10.0.0.0/24 is subnetted, 1 subnets
O*E1 0.0.0.0/0 [110/11] via 192.168.1.2, 00:00:12, FastEthernet0/1
R2's RT:
R2#sh ip route | in 0.0.0.0
Gateway of last resort is 172.16.1.2 to network 0.0.0.0
10.0.0.0/24 is subnetted, 1 subnets
O*E1 0.0.0.0/0 [110/11] via 172.16.1.2, 00:10:49, FastEthernet0/0
However, if I bring down, r1-bb1 link or r2-bb2 link, and brings back,
things
are different.
R1' RT:
Gateway of last resort is 10.2.2.2 to network 0.0.0.0
10.0.0.0/24 is subnetted, 2 subnets
O*E2 0.0.0.0/0 [110/1] via 10.2.2.2, 00:00:26, FastEthernet0/0
R1 prefers E2 route than a E1 route:
If I make route-metric type to E1, it still prefers higher metric route:
R1#sip | in 0.0.0.0
Gateway of last resort is 10.2.2.2 to network 0.0.0.0
10.0.0.0/24 is subnetted, 2 subnets
O*E1 0.0.0.0/0 [110/20001] via 10.2.2.2, 00:14:54, FastEthernet0/0
R1' OSPF DB:
R1#sh ip os da ex 0.0.0.0
OSPF Router with ID (192.168.1.1) (Process ID 64)
Type-5 AS External Link States
LS age: 2703
Options: (No TOS-capability, DC)
LS Type: AS External Link
Link State ID: 0.0.0.0 (External Network Number )
Advertising Router: 12.12.12.51
LS Seq Number: 80000002
Checksum: 0x6179
Length: 36
Network Mask: /0
Metric Type: 1 (Comparable directly to link state metric)
TOS: 0
Metric: 1
Forward Address: 0.0.0.0
External Route Tag: 1
Routing Bit Set on this LSA
LS age: 1216
Options: (No TOS-capability, DC)
LS Type: AS External Link
Link State ID: 0.0.0.0 (External Network Number )
Advertising Router: 192.168.1.2
LS Seq Number: 80000001
Checksum: 0x982E
Length: 36
Network Mask: /0
Metric Type: 1 (Comparable directly to link state metric)
TOS: 0
Metric: 1
Forward Address: 0.0.0.0
External Route Tag: 1
OSPF Router with ID (10.1.1.1) (Process ID 1)
Type-5 AS External Link States
Routing Bit Set on this LSA
LS age: 978
Options: (No TOS-capability, DC)
LS Type: AS External Link
Link State ID: 0.0.0.0 (External Network Number )
Advertising Router: 172.16.1.1
LS Seq Number: 80000001
Checksum: 0x185C
Length: 36
Network Mask: /0
Metric Type: 1 (Comparable directly to link state metric)
TOS: 0
Metric: 1
Forward Address: 0.0.0.0
External Route Tag: 1
Thanks in advance.
Tx n RD
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