HP 200 Series Services And Applications page 83

Between the first and last bridge receiving the SRF:
received by bridge B from ring 3 has traversed at least one other bridge.
However, this is not the last bridge that the frame must traverse. This
bridge does the following to the RIF before transmitting the frame to-
ward ring 2. (See figure 21.)
Locates the bridge ID that is located at the end of the HP group
address.
Changes the bridge ID at the end of the HP group address to the
bridge ID of the next bridge in the RIF. (In this example, all bridge
IDs are the same, so the frame is not modified.)
Last of several bridges receiving the SRF:
several bridges traversed by the frame. This bridge does the following to
the RIF of the frame it receives, before transmitting the frame toward
ring 1. (See figure 21.)
Replaces the HP group address with the destination station address
that was saved to the data field.
Replaces the group LAN ID with its own internal LAN ID.
Bridging Service
Source-Routing Bridging
The frame
Bridge A is the last of
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