distribution OSPF

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Jan 8th, 2008
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what kind of route it will be if i will use redistribute command under ospf and what kind of route it will be if i will use distribute list with route map? will it be external or internal?


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royalblues Tue, 01/08/2008 - 13:01
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When you redistribute into OSPF, the routes are tagged as "External" either type 1 or type 2 default being type 2


Distribute list in OSPF is used for controlling prefixes from being entered into the routing table and not for redistribution


HTH

Narayan

guruprasadr Tue, 01/08/2008 - 20:30
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HI, [Do Rate all HELPFUL POSTS]


Refer link below for distribute list with route-map:


http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120s/120s24/routmap.htm


Using Distribute List with Route-Map statements, will be useful to define a Route-Map to prevent OSPF Routes from being added to the Routing Table.


Refer link below for Eg: OSPF Router redistributing the other Protocols:


http://www.cisco.com/warp/public/105/redist.html#ospf


Do RATE ALL HELPUL POSTS


Best Regards,


Guru Prasad R

Jon Marshall Tue, 01/08/2008 - 13:03
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Hi


Routes redistributed into your OSPF process will always be external routes, either type 1 or type 2.


Type 1 = Cost of external route as advertised into the OSPF AS + the internal cost within the OSPF AS.


Type 2 = Just the cost of the external route as advertised into the OSPF AS.


By default the type is 2 but you can change this when you redistribute using the "metric" option.


They would still be external whether you use a distribute list/route-map or not.


Jon

marikakis Tue, 01/08/2008 - 13:15
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Hello,


"Redistributing routes into OSPF from other routing protocols or from static will cause these routes to become OSPF external routes."

http://www.cisco.com/en/US/tech/tk365/technologies_white_paper09186a0080094e9e.shtml#t32


Distribute-list out: works on originating ASBR, does not let the externals of this ASBR to be flooded in the network towards other OSPF routers

Distribute-list in: does not let incoming LSA's make it to the routing table

http://www.cisco.com/en/US/tech/tk365/technologies_q_and_a_item09186a0080094704.shtml#q12


Kind Regards,

M.

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