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The_guroo_2
Explorer

BGP

Guys we have three methods to filter routes in BGP(correct me if i m wrong) first one is distibute list second is route maps and third is prefix-list.....what is the diference between them

3 REPLIES 3
s.arunkumar
Participant

U can use filter-list(eg: for as-path access-list) also along with the above three..

U will get more details over here..

http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hirp_r/

All of them more or less achieves the same thing except for route-maps which gives you more felxibility and can reference a prefix-list, access-list etc and also set attributes

HTH

Narayan

Pavel Bykov
Contributor

Every method filters using it's own technique. What is important is their sequence, which is reversed for outbound and inbound updates.

On Inbound:

1. Prefix List

2. Filter List

3. Route Map

4. Distribute List

On Outbound:

1. Distribute list

2. Route Map

3. Filter list

4. Prefix List

From the other routing process inside the router:

1. Filter List

2. Distribute List

3. Default Weight

4. Filter-list weight

5. Route maps

Hope this helps.

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