
Configuring Bridging Services
2-14 114060 Rev. A
How the Source Routing Bridge Handles Specifically Routed Frames
This section describes how the Bay Networks source routing bridge handles
specifically routed frames (SRFs) sent from ES2 to ES1. Depending on the
bridge’s position in the network, the bridge handles the SRFs differently
(Figure
2-9).
Figure 2-9. Tracking a Specifically Routed Frame from ES2 to ES1
If there is only a single bridge ID in the RIF, then the Bay Networks bridge
transmits the frame to the outgoing circuit without modification. This is true only
when the frame traverses a single Bay Networks bridge (or any combination of
third-party bridges) between the source and destination endstation.
If there are multiple bridge IDs in the RIF, then:
• Example A describes the actions of a Bay Networks bridge if it is the first
bridge to handle the SRF.
• Example B describes the actions of a Bay Networks bridge if there are
multiple bridge IDs in the RIF, and the bridge is between the first and last Bay
Networks bridge to handle the SRF.
• Example C describes the actions of a Bay Networks bridge if there are
multiple bridge IDs in the RIF, and the bridge is the last Bay Networks bridge
to handle the SRF.
Group ID = FFF
LAN ID = 100
Bridge ID = ABridge ID = A
Group ID = FFF
LAN ID = 101
Group ID = FFF
LAN ID = 102
ES 2
ES 1
Bridge A
Bridge B
Bridge C
Example A Example B
Example C
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21
Internal
Internal
Internal
Internal
Internal
Internal
Bridge ID = A
BRG0018A
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