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BGP - How to influence partial network on outgoing update

guibarati
Level 4
Level 4

‎08-05-2013 10:37 AM - edited ‎03-04-2019 08:39 PM

Hi,

Does anyone know if it's possible to influence only a portion of the networks updates been sent over eBGP connection?

If I am advertising the network 100.1.1.0/24, and I have this network directly connected on one interface, the router is connected to two ISPs (with different AS's). Can I influence the updates to say the host 100.1.1.20 has better path through ISP A and everything else ISP B?

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16 Replies 16

guibarati
Level 4
Level 4
In response to Joseph Nelson

‎08-06-2013 08:20 AM

If I announce a more specific and prepend the AS a few times on the AS-PATH wouldn't it make the Internet see this ISP as "less preferred"?

Sent from Cisco Technical Support iPhone App

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Joseph Nelson
Level 1
Level 1
In response to guibarati

‎08-06-2013 08:25 AM

Yes. Advertising a more specfic with prepends should do the trick.

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