from OSPF' Router ID list. Only applicable for OSPF sourced
routes and if OSPF is included as a route source. This octet
string contains the router IDs of one or more OSPF routers.
If a router ID is included in this list, this filter applies
to OSPF advertisements authored by that router.
If non-null, The octet string contains one or more 4-octet
IP addresses. If null, this filter applies to OSPF updates
from any router.