User`s guide

3-46

Conﬁguring

and NetBIOS frames. All other protocols will NOT have their

RIF cached. Support for other protocols will be in future releases.

Example #1:

Port 1 is conﬁgured for transparent

Port 2 is conﬁgured for source route transparent

SRTB is enabled

LCM Commands:

bridge 1 transparent

bridge 2 SRT

SRTB all on ARE

Station A sends out a broadcast for station B. The ATX will see that

station A resides on P1 and enter station A into the Bridge Address

Table with no RIF associated. The ATX will then send an ARE (Null

RIF) out P2. Station B receives the ARE and replies to station A.

The ATX receives the reply on P2 and enters station B into the

Bridge Address Table with the RIF of Ring 2, Bridge F and Ring 1.

The next time station A speaks to station B the frame will enter P1

on the ATX transparently and be sent out P2 with the RIF of Ring 1,

Bridge F and Ring 2.

In previous releases, without the SRTB option enabled, the packet

from Ethernet A to Token Ring B would have been forwarded out

P2 as a transparent packet and never crossing the SR only bridge.

ATX

LAN

SWITCH

RING 1

BRIDGE F

ONLY

BRIDGE

RING 2