Re: VRF-lite in a pure OSPF network

Good morning
Thanks a lot for the replies, it seems that I did confuse the Down Bit, the
examples I saw were always something with Down(ward?) and I only saw the
UPWARD flag mentioned by Paul. Its clearer now :)

Paul, you were perfectly right, that R3 got all routes, only R2 was
tricking me and that it only put the Down bit on Summary LSAs, but not
External LSAs. Forgot to remove the totally stubby from the example above
,-)

And thanks for the hint with the MPLS Fundamentals Book Rob, gonna check it.

best regards

Michel

On 12 January 2012 18:17, Rob Laidlaw <laidlaw_at_consecro.com> wrote:

> MPLS Fundamentals, Cisco Press, P.243 - Section "OSPF VRF-Lite command"
>
> It explains the checks the router does to avoid loops.
>
> HTH,
>
> Rob
>
> On Thu, Jan 12, 2012 at 10:24 AM, Michel Grossenbacher <pashtuk_at_gmail.com
> > wrote:
>
>> Hi all
>> I got some issues at the moment with VRF-lite and the capability vrf-lite
>> command in a pure OSPF network. There is plenty of documentation around
>> for
>> VRF-Lite in combantion with OSPF and BGP, but I cant find something for
>> OSPF only.
>>
>> Just a simple layout:
>>
>> R1 -- R2 -- R3
>>
>> - R14s loopback is playing the area 0, Loopback 1 is redistributed into
>>
>> OSPF (just to have an External LSA)
>> - R1, R2 and R3 are all in Area 123 -> totaly stubby area
>> - R2 is configured for VRF lite on both interfaces (R1/R3)
>>
>>
>> So as it is now, R2 is not able to see (as to put in his routing table)
>> any
>> Inter-Area Routes (R1s lo0 interface, Summary LSAs), even though its in
>> the
>> OSPF Database and it is advertising all routes to R3. I know the command
>> capability vrf-lite does fix this, but I4d like to know why the router
>>
>> behaves like this and cant find any answer so far. Kinda driving me nuts
>> :-D
>>
>> Any help would be greatly appreciated
>>
>> best regards
>>
>> Michel
>>
>>
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Received on Fri Jan 13 2012 - 10:09:20 ART