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Is there any way of having a filter that uses as-path origin and prefix-list together. For example I want to accept updates from origin of AS 5745 and prefix-list is say 189.150.20.X/24. Any other prefix from origin AS 5745 will be denied.

Thanks.

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  • Are you directly connected to AS 5745?
    – Ron Maupin
    Jul 20 '19 at 22:53
  • No, it is few hops away. Jul 20 '19 at 22:54
  • I forgot to mention AS 5745 here originator Jul 20 '19 at 22:57
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For Cisco IOS, You can have more than one match criteria, and they will be processed as a logical AND.

For example

Route-map mymap permit 10
 Match as-path access-list abc
 Match ip prefix-list def

The route map will only match prefixes that match abc AND def.

For IOS-XR, there is a more flexible method than route- maps called RPL.

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  • Thanks for the answer, I tested it and got it working. Do you know if it possible to apply more than one route maps to the same neighbor? Jul 20 '19 at 23:50
  • or is it possible to process matching criterias as a logical or? Jul 20 '19 at 23:58
  • Yes you can add another stanza: route-map mymap permit 20
    – Ron Trunk
    Jul 21 '19 at 0:04
  • But how do I apply them to the same peer? It looks like last route map is overriding the earlier ones when multiple route map is applied. Or is there anything like match route-map filter to combine multiple route-maps under the single one, so I can apply this to peer? Jul 21 '19 at 0:19
  • If the prefix doesn’t match mymap 10, it will try it against mymap 20. You can add as many stanzas as you like.
    – Ron Trunk
    Jul 21 '19 at 0:33

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