From: Huan Pham (Huan.Pham@peopletelecom.com.au)
Date: Tue Oct 14 2008 - 19:54:02 ART
Hi Naman,
You are correct.
By default, when you redistribute from OSPF to RIP, then RIP will get
the following:
- All OSPF routes in the routing table (not necessarily all routes in
OSPF database!)
- All connected routes that OSPF is running on
For the corrected routes, let immagine that router automatically put on
a default route-map that match all interface that run OSPF.
When you have manually specify a new route-map to selectively chose what
interface to redistribute into RIP, then only those interfaces get
redistributed. Normal router behavior applies here, as you cannot apply
more than 1 route-map (from Connected to RIP), can you? So in your case,
if you want to redistribute a connected Fa0/2 into RIP, in addition to
your S0/0/1, and Fa0/1, in your connected to Rip route-map you have to
specify ALL 3 interfaces.
You'd better lab it up, and try different scenarios and see for yourself
so that these rules stick better in your head.
IE CoD on redistribution by Brian Dennis explains very well these rules.
Regards,
Huan
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
naman sharma
Sent: Wednesday, 15 October 2008 8:02 AM
To: Cisco certification
Subject: Redistribution Rule
Hi Group,
I am just too confused with redistribution default rule, can anyone help
me on this.
As per the rule when we redistribute between 2 protocols then the
connected interfaces on which the protocol is already running will get
redistributed into another protocol immediately.
Now in case one protocol has redistribute connected with route-map
configured this rule breaks, here is the example.
Mutual Redistributing between RIP and OSPF.
RIP running on serial0/0/0 and fa0/0 of router OSPF running on s0/0/1
and Fa0/1 of router.
Now in case there is a redistribute connected command configured under
OSPF with route-map then when RIP is getting redistributed into OSPF
then s0/0/0 and Fa0/0 connected interfaces will not be automatically
redistributed as per the break in the rule and we have to manually add
these interfaces under OSPF redistribute connected route-map.
Please correct me if i am wrong.
Thanks
Blogs and organic groups at http://www.ccie.net
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