Not applicable for first phase of Integrated IS_IS
from EGP' Peer AS list. Only applicable for EGP sourced
routes and if EGP is included as a route source. This octet
string contains Autonomous System Numbers. If an AS number
is included in this list, this filter applies to EGP
advertisements received from EBP peers in that AS.
If non-null, The octet string contains one or more 2-octet
AS numbers. If null, this filter applies to EGP advertisements
from peers in any AS.