Unanswered Question
Jan 20th, 2008
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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

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royalblues Sun, 01/20/2008 - 23:33
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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



Pavel Bykov Mon, 01/21/2008 - 02:34
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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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