Dear admin,

One day before configuring BGP to delete AS number I asked for precautionary help to Huawei support website got valuable answer which ultimately saves my operation down time.

Thanks to Huawei team.

Solution:

On the NE80E, the command for removing the AS number is peer { ip-address | group-name }

public-as-only. Generally, BGP update packets carry the AS numbers, which may be public

and/or private AS numbers.

After this command is configured, if the AS_Path attribute carried in BGP routing

 information

contains only private AS numbers, BGP deletes these private AS numbers before advertising

such routing information.

This command is applicable to only EBGP peers.

In the following cases, after the preceding command is configured, BGP does not delete

private AS numbers:

1. The AS_Path of the route contains the AS number of the peer. In this case, deleting private

AS numbers may cause route loops.

2. The AS_Path list contains both public and private AS numbers. This indicates that the route has passed the public network. Deleting private AS numbers may cause forwarding errors.

In other words, this command is applicable only to the routes consisting of only private ASs.  

Good success story  .......

very good success...