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New Member

Migration from Private AS to Public AS

Dears

i will need your guide.

we have an MPLS VPN backbone working with Private AS number , all PEs are working with BGP configuration with that Private AS.

also PE-CE EBGP for our customers is running with the same AS.

we are now in the phase to migrate to Public AS for inter AS connectivities.

but the migration seems to be difficult, as changing the BGP on a router will affect all others.

any help ?

1 ACCEPTED SOLUTION

Accepted Solutions

Re: Migration from Private AS to Public AS

Hello Mohamed,

there is a feature within BGP that allows you to support two AS numbers simultaneously. This feature is actually designed to help with situations like the one you are facing. Have a look at the following document:

BGP Support for Dual AS Configuration for Network AS Migrations

http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cg/hirp_c/ch05/hbgpdas.htm

Regards,

GNT

4 REPLIES

Re: Migration from Private AS to Public AS

Hello Mohamed,

there is a feature within BGP that allows you to support two AS numbers simultaneously. This feature is actually designed to help with situations like the one you are facing. Have a look at the following document:

BGP Support for Dual AS Configuration for Network AS Migrations

http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cg/hirp_c/ch05/hbgpdas.htm

Regards,

GNT

New Member

Re: Migration from Private AS to Public AS

Wow , thanks for the fast response and for the very informative link.

but why doesn't the link have any info about the supported platform or hardware.

New Member

Re: Migration from Private AS to Public AS

ops

sorry , i found it :)

Re: Migration from Private AS to Public AS

Hello Mohamed,

if you have the proper CCO access level, you can check the Cisco Feature Navigator at the link below to see if your IOS and platform supports the fearure. If you do not have access, post your platforms and IOS versions, and I will check for you.

Cisco Feature Navigator

http://tools.cisco.com/ITDIT/CFN/jsp/index.jsp

Regards,

GNT

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