Bay Networks 58000, Installation And Reference Manual

Page: 58 / 158

Planning a Switched Network
2-20 893-878-B
If one of the ports connecting to a common Ethernet segment is not configured
to operate in feeder mode, the switch does not use the LattisSpan forced feeder
detection process to determine which feeder port will be active. In this case, the
port that is not operating in feeder mode (port is configured for auto mode) is
designated the active feeder port, regardless of the prioritized attributes of the
port (see
Figure 2-6 ).
Figure 2-6. Sample configuration: auto port overrides forced feeder ports
If the configuration shown in Figure 2-6 had all ports configured for feeder
mode, port 1would be designated the active feeder port. Port 1 would be
designated the active feeder port because it has the lowest port number—the
port ID attribute is used to determine the highest priority port. Ports 2 and 3 are
designated standby feeder ports. However, port 3 is operating in auto mode, so
it is designated the active feeder port, and ports 1 and 2 are designated standby
feeder ports.
(10 Mb/s half-duplex)
Active feeder link
(10 Mb/s half-duplex)
Standby feeder link
key
Model 58000 switch
Workstations
Ethernet segment
Server
Port 1 Port 2 Port 3
6574
893-878-B Book Page 20 Monday, May 12, 1997 2:06 PM