From: gladston@br.ibm.com
Date: Mon May 16 2005 - 09:46:30 GMT-3
R1 and R5 injects de same route, 55.55.55.0, on area 0
Metric used on redistribution is the same, 20.
Metric to ASBR R1 and R5, from CAT2, is the same, 65.
CAT2 always choose R5. Are you aware of the reason?
Rack2CAT2#sir 55.55.55.0
Routing entry for 55.55.55.0/24
Known via "ospf 1", distance 110, metric 20, type extern 2, forward metric 65
Last update from 142.20.28.2 on Vlan20, 00:00:27 ago
Routing Descriptor Blocks:
* 142.20.28.2, from 142.20.5.1, 00:00:27 ago, via Vlan20
Route metric is 20, traffic share count is 1
Rack2CAT2#
Rack2CAT2#sh ip os da ex
Rack2CAT2#sh ip os da external 55.55.55.0
OSPF Router with ID (142.20.8.1) (Process ID 1)
Type-5 AS External Link States
Routing Bit Set on this LSA
LS age: 838
Options: (No TOS-capability, DC)
LS Type: AS External Link
Link State ID: 55.55.55.0 (External Network Number )
Advertising Router: 142.20.1.1
LS Seq Number: 80000001
Checksum: 0x73E2
Length: 36
Network Mask: /24
Metric Type: 2 (Larger than any link state path)
TOS: 0
Metric: 20
Forward Address: 0.0.0.0
External Route Tag: 0
Routing Bit Set on this LSA
LS age: 43
Options: (No TOS-capability, DC)
LS Type: AS External Link
Link State ID: 55.55.55.0 (External Network Number )
Advertising Router: 142.20.5.1
LS Seq Number: 80000001
Checksum: 0x57FA
Length: 36
Network Mask: /24
Metric Type: 2 (Larger than any link state path)
TOS: 0
Metric: 20
Forward Address: 0.0.0.0
External Route Tag: 0
Rack2CAT2#
Rack2CAT2#
Rack2CAT2#sir 55.55.55.0
Routing entry for 55.55.55.0/24
Known via "ospf 1", distance 110, metric 20, type extern 2, forward metric 65
Last update from 142.20.28.2 on Vlan20, 00:02:17 ago
Routing Descriptor Blocks:
* 142.20.28.2, from 142.20.5.1, 00:02:17 ago, via Vlan20
Route metric is 20, traffic share count is 1
Rack2CAT2#
Rack2CAT2#sh ip os da external 55.55.55.0
OSPF Router with ID (142.20.8.1) (Process ID 1)
Type-5 AS External Link States
Routing Bit Set on this LSA
LS age: 940
Options: (No TOS-capability, DC)
LS Type: AS External Link
Link State ID: 55.55.55.0 (External Network Number )
Advertising Router: 142.20.1.1
LS Seq Number: 80000001
Checksum: 0x73E2
Length: 36
Network Mask: /24
Metric Type: 2 (Larger than any link state path)
TOS: 0
Metric: 20
Forward Address: 0.0.0.0
External Route Tag: 0
Routing Bit Set on this LSA
LS age: 144
Options: (No TOS-capability, DC)
LS Type: AS External Link
Link State ID: 55.55.55.0 (External Network Number )
Advertising Router: 142.20.5.1
LS Seq Number: 80000001
Checksum: 0x57FA
Length: 36
Network Mask: /24
Metric Type: 2 (Larger than any link state path)
TOS: 0
Metric: 20
Forward Address: 0.0.0.0
External Route Tag: 0
Rack2CAT2#
Rack2CAT2#sh ip os border-routers
OSPF Process 1 internal Routing Table
Codes: i - Intra-area route, I - Inter-area route
i 142.20.2.1 [1] via 142.20.28.2, Vlan20, ABR/ASBR, Area 16, SPF 2
I 142.20.4.1 [1065] via 142.20.28.2, Vlan20, ASBR, Area 16, SPF 2
I 142.20.5.1 [65] via 142.20.28.2, Vlan20, ASBR, Area 16, SPF 2
I 142.20.1.1 [65] via 142.20.28.2, Vlan20, ASBR, Area 16, SPF 2
Rack2CAT2#
Rack2CAT2#sir 142.20.1.1
Routing entry for 142.20.1.1/32
Known via "ospf 1", distance 110, metric 66, type inter area
Last update from 142.20.28.2 on Vlan20, 00:22:19 ago
Routing Descriptor Blocks:
* 142.20.28.2, from 142.20.2.1, 00:22:19 ago, via Vlan20
Route metric is 66, traffic share count is 1
Rack2CAT2#sir 142.20.5.1
Routing entry for 142.20.5.1/32
Known via "ospf 1", distance 110, metric 66, type inter area
Last update from 142.20.28.2 on Vlan20, 00:22:23 ago
Routing Descriptor Blocks:
* 142.20.28.2, from 142.20.2.1, 00:22:23 ago, via Vlan20
Route metric is 66, traffic share count is 1
Rack2CAT2#
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