Ref: 13680001
Title: Filters for 3+ Services on Internetwork Bridges
date: 8/30/89

Copyright 3Com Corporation, 1991.  All rights reserved.

If a 3+ service is installed on both segments of a pair of
internetwork bridges (IBs), a filter is required.

Note:  The network numbers on both networks must match.  If both
segments must keep their own network number, a router such as the
GS/3 should be used instead of IBs.

Network Segmentation Filters (Multiple Name, Start, Locator)

                                    socket #    broadcast     XNS
                                      |             |          |
Block broadcast for Name service : %1E:%0464,  %0:%FFFF,  %C:%0600
Block broadcast for Start service: %1E:%0401,  %0:%FFFF,  %C:%0600
Block broadcast for Locator:       %1E:%046D,  %0:%FFFF,  %C:%0600
Block Ethershare logout broadcast: %1E:%0468,  %0:%FFFF,  %C:%0600


Block Netmap broadcasts (XNS):     %C:%9001
Block IB Loopback test packets:    %C:%9003


Following are optional security filters for the Name service.

Filter CreatObject: %1E:%0464, %41:%02
Filter DelObject  : %1E:%0464, %41:%03
Filter CreateAlias: %1e:%0464, %41:%0A
Filter DelAlias   : %1E:%0464, %41:%0B
Filter AddMember  : %1E:%0464, %41:%13
Filter DelMember  : %1E:%0464, %41:%15
