Description: An alternative 'local AS' number that can be used to create a session to this peer. This is used when merging two ASs into a single AS.

A value of zero means 'not configured'. If a non-zero value is configured, then the AS number included in the OPEN messages sent when trying to create the peer session will alternate between the 'normal' local AS number (defined by bgpRmEntLocalAs) and the 'alternative' local AS number defined here.

If this is an iBGP peer, then bgpPeerRemoteAs must have the same value as bgpRmEntLocalAs. In this case, an OPEN message received from the remote peer will be accepted if it contains an AS number that matches either bgpPeerConfAltLocalAs or bgpPeerRemoteAs.

If this is an eBGP peer, then bgpPeerRemoteAs must contain the remote peer's AS number. An OPEN message received from the remote peer will be accepted only if it contains an AS number that matches bgpPeerRemoteAs.

This field can be changed at any time. However, if the field is changed while the row is admin_status UP, the change will only take effect after the row has been deactivated and reactivated, thus forcing the peer session to be restarted.

If this router is a member of a confederation, then this field is meaningless and is ignored.