Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 555)

Multi-Service IronWare Switching Configuration Guide 525
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Forced switch
15
Figure 141 shows the sequential order of events triggered as a result of an operator-initiated forced
switch command entered from ERN 4.
FIGURE 141 Single FS process--operator entered the forced switch command from ERN 4
RPL owner (ERN1) Non-RPL node (ERN 2) Non-RPL node (ERN 3) Non-RPL node (ERN 4)
Idle Idle Idle From the Idle state, ERN 4:
1
Processes the Forced
Switch command
2 Blocks the requested
port
3 Transmits R-APS (FS)
4 Unblocks the
non-requested port
5 Flushes the FDB
6 Enters the Forced
Switch (FS) state
From the Idle state, ERN 1:
1
Unblocks the RPL
2 Flushes the FDB for
first time
3 Forwards R-APS(FS)
4 Enters the FS state
From the Idle state, ERN 2:
1
Unblocks the port
2 Flushes the FDB for
the first time
3 Forwards R-APS(FS)
4 Enters the FS state
From the Idle state, ERN 3:
1
Unblocks the port
2 Flushes the FDB for the
first time
3 Forwards R-APS(FS)
4 Enters the FS state
From the FS state, ERN 1
forwards R-APS From the FS state, ERN 2
forwards R-APS From the FS state, ERN 3
forwards R-APS From the FS state, ERN 4:
7. Transmits R-APS(FS)
8. Terminates the received
R-APS on the blocking port
9. Terminates its own
R-APS(FS)
All ERNs remain in FS state.