This Integer32 object (0 to 65535) identifies an access list entry, drawn from the csOrionGenAclTable, that this virtual router's packet filter applies. The desc states that all packets transmitted or received on any of this virtual router's virtual interfaces which satisfy that access list entry are acted upon by this filter, tying a previously defined General ACL rule to actual packet forwarding on a specific virtual router. For example, setting this to the ID of a General ACL entry that matches traffic from 192.168.50.0 would cause this virtual router to filter packets on all its interfaces according to that rule.