09-01-2014 06:12 AM - edited 03-04-2019 11:39 PM
As the title says, I am looking for the best way to not advertise EIGRP networks into the networks BGP AS. What would be the best way to accomplish this?
Sorry if this is a basic question, but I am getting thrown into the fire here lol.
Thanks
09-01-2014 06:28 AM
09-01-2014 06:35 AM
in order to advertise EIGRP networks into BGP, you need to redistirbute EIGRP networks under BGP process.
In case you are already advertising there are two ways,
1.use distribute list under EIGRP process in order to permit or block some networks.
2.Use route-map while doinfg reditribution under BGP process.
Hope this helps.
Regards,
Kamlesh Yadav
09-01-2014 06:57 AM
09-01-2014 07:06 AM
You are absolutely correct.we need to remove network statement corresponding to EIGRP routes from BGP in order to stop advertisement.
In addition of that if we are using redistribution then we can filter what routes needs to redistributed from EIGRP to BGP.
09-02-2014 05:51 AM
The distribute list and route map will work in your situation, but removing the network command will stop eigrp on interfaces that related to those networks unless static neighbor commands are assigned.
09-02-2014 02:05 PM
BGP is not like OSPF,RIP, or EIGRP, in that, it does not advertise a subnet just because it is enabled on the corresponding interface. In order for BGP to advertise a route it needs to be installed into the BGP process by the Network x.x.x.x mask x.x.x.x command or by redistribution. If you want to selectively redistribute from a routing process to BGP then I would encourage you to create a distribution list to limit the subnets getting redistributed.
Note: If there is not an exact match (network and prefix length) to your Network x.x.x.x Mask x.x.x.x command it will not go into the BGP table.
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