From: eric (namaste@pacbell.net)
Date: Sun Mar 16 2003 - 01:57:09 GMT-3
Sage,
I am not sure what is going, 8 hours of staring at a screen but your first
example 150.10.8.0 is not equal cost
efore area-range:
a) 155.10.8.0/25 [170/84] via 155.10.11.1, 00:06:27, 84
After area-range:
1) 155.10.8.0/24 [170/74] via 155.10.11.1, 00:06:27, 74
2) 155.10.8.0/25 [170/84] via 155.10.11.1, 00:06:27, 84
So it appears that 155.10.11.01 is learning the /25 from someone else or
originating it and since it is more specific it gets installed even though
the cost is higer.
Your summarization is forcing the /24 in.
Maybe your learning it from 2 differnt interfaces since there is nothing in
your paste, only who is adv. it.
the /25 is farther away hence the higher cost.
look a little closer you'll find it.
Regards,
~e
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Sage Vadi
Sent: Saturday, March 15, 2003 6:15 PM
To: ccielab@groupstudy.com
Subject: OSPF: weird summarization issue
Dear all,
Have an _extremely_ weird OSPF summarization issue.
When I summarize the below network to a /24 I still
get the non-summarized network as well!!! This seems
to occur because this particular network is an equal
cost route learned from TWO adjacent OSPF neighbors.
Before area-range:
a) 155.10.8.0/25 [170/84] via 155.10.11.1, 00:06:27,
After area-range:
1) 155.10.8.0/24 [170/74] via 155.10.11.1, 00:06:27,
2) 155.10.8.0/25 [170/84] via 155.10.11.1, 00:06:27,
When I summarize a single network as below:
Before area-range:
a) 155.10.61.0/29 [170/74] via 155.10.11.3, 00:04:18,
After area-range:
b) 155.10.61.0/24 [170/74] via 155.10.11.3, 00:00:16,
Summarization seems to work fine.
So what I'm asking is if we summarize from two equal
learnt networks, is this behaviour established by the
above testing normal?
rgds,
Sage
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