Keshava,
I do not see a reason why this needs to be standardized, as this
represents a local behavior of the PE and does not pose any
interoperability issues.
thanks,
Peter
On 17.11.2010 7:46, Keshava.Ayanur wrote:
Peter,
Instead of leaving this to implementation, it is better to define the exact
behavior/rules how to be handled.
Else there may be many possibilities like
a)aggregation based on backbone area range,
b)on area-id map, corresponding area range ..
Keshava
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of
Rajesh Shetty
Sent: Wednesday, November 17, 2010 10:38 AM
To: 'Peter Psenak'
Cc: [email protected]
Subject: Re: [OSPF] OSPF::aggregating huge number 'summary LSA" originated
AT PE ..
Peter,
When PE report the route as Type3 LSA to CE (redistributed, might be huge in
number), In this scenario is there a good mechanism to aggregate Type3 LSAs
at PE before sending to CE.
For such kind of Type3 Aggregation should we use backbone area range since
PE router is considered as integral part of OSPF backbone?
Thanks
Rajesh
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-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of
Peter Psenak
Sent: Tuesday, November 16, 2010 4:46 PM
To: Keshava.Ayanur
Cc: [email protected]
Subject: Re: [OSPF] OSPF::aggregating huge number 'summary LSA" originated
AT PE ..
Keshava,
it's up to the implementation how it handles the aggregation of the BGP
redistributed prefixes on PE. The most obvious choice is to treat it the
same way as regular redistribution in which case an external LSA is
generated for the summary itself.
RFC4577 only specifies the behavior when no aggregation is done on PE:
In the following, we specify what is reported, in OSPF LSAs, by the
PE to the CE, assuming that the PE is not configured to do any
further summarization or filtering of the routing information before
reporting it to the CE."
thanks,
Peter
On 16.11.2010 11:33, Keshava.Ayanur wrote:
Hi,
Any thoughts about aggregating the "Summary LSA's' originated in PE
which was redistributed from BGP .
Regards,
Keshava.A.K.
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