enabl BGP between PE-CE when PE and CE are in same AS

[tharakasj]

We have BGP enable PE-CE setup in MPLS network. Customer A has branches with unique AS numbers.

We connected our PE routers via BGP with customer CE. Issue is Customer's Head Office AS number is equal to our AS number .

We are telecom provider having same AS for iBGP in our MPLS network.

Can you say how connect customer AS (Headoffice) with our PE router when PE and CE are in same AS

[Giuseppe Larosa]

Hello Tharaka,

you could try to use the neighbor ...local-as command on the CE side to have it to act as it was in a different AS.

Hope to help

Giuseppe

[c.lemaire]

Hi,

You coul use "neighbor x.x.x.x local-as xyz no-prepend replace-as" on both CE and PE. This would hide the real ASN on both side.

Regards,

Christophe

[shehzadtesleem]

Hi, even you can use this command only at one side.

[c.lemaire]

No, you cannot use it only at one side otherwise one side will try to do an iBGP peering while the other will try to do an eBGP peering. And anyway, IOS is smart enough to refuse the local-as command if the remote-as matches its local AS.