I think what you need to see is an output of
sh ip ospf borger-routers
to help.
Even though the FA address is there, what routing decisions are actually done
on the traceroute is pulled from the full routing table, which takes into
consideration other discovered routes.
I did find this on cisco.com...
When the metric of the redistributed route from multiple ASBRs are
equal as illustrated in the document, the forwarding address changes
the
behavior of the type 5 LSA path selection. When a router receives two
type 5
LSAs to the same destination with the forwarding addresses set on both
LSAs,
the router makes a comparison based on the metric to the forwarding
addresses.
The LSA with a forwarding address that offers the smaller metric is
placed into
the routing table.
If the metric of the redistributed routes are different, the routers
prefer the route with the lowest metric and not the lowest metric to
the
forwarding address.
HTH
cyborgz
> R4#sh ip ospf data external 5.5.5.5
>
> OSPF Router with ID (4.4.4.4) (Process ID 1)
>
> Type-5 AS External Link States
>
> Routing Bit Set on this LSA
> LS age: 767
> Options: (No TOS-capability, DC)
> LS Type: AS External Link
> Link State ID: 5.5.5.5 (External Network Number )
> Advertising Router: 1.1.1.1
> LS Seq Number: 80000002
> Checksum: 0xE0A6
> Length: 36
> Network Mask: /32
> 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: 340
> Options: (No TOS-capability, DC)
> LS Type: AS External Link
> Link State ID: 5.5.5.5 (External Network Number )
> Advertising Router: 6.6.6.6
> LS Seq Number: 80000002
> Checksum: 0x2601
> Length: 36
> Network Mask: /32
> Metric Type: 2 (Larger than any link state path)
> TOS: 0
> Metric: 20
> Forward Address: 3.3.65.5
> External Route Tag: 0
> traceroute 5.5.5.5 nu
> 1 3.3.24.2 88 msec
> 3.3.34.3 68 msec
> 3.3.24.2 28 msec
> 2 3.3.36.6 68 msec
> 3.3.12.1 92 msec
> 3.3.36.6 64 msec
> The result is that OSPF is not using the FA address in this case even it is
> set
>
> this is what i meant :)
>
>
> R1 and R6 are ASBR
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