Supermicro SSE-G2252, User Manual

Page: 1058 / 1401

Chapter 35: ERPS Commands
– 1071 –
•
The erps clear command will also stop the WTR and WTB delay timers
and reset their values.
•
More detailed information about using this command for non-revertive
mode is included under the Command Usage section for the non-
revertive command.
E
XAMPLE
Console#erps clear domain r&d
Console#
erps forced-switch
This command blocks the specified ring port.
S
YNTAX
erps forced-switch [domain ring-name ] {east | west}
ring-name - Name of a specific ERPS ring. (Range: 1-12 characters)
east - East ring port.
west - West ring port.
C
OMMAND
M
ODE
Privileged Exec
C
OMMAND
U
SAGE
•
A ring with no pending request has a logical topology with the traffic
channel blocked at the RPL and unblocked on all other ring links. In this
situation, the erps forced-switch command triggers protection
switching as follows:
a.
The ring node where a forced switch command was issued blocks
the traffic channel and R-APS channel on the ring port to which the
command was issued, and unblocks the other ring port.
b.
The ring node where the forced switch command was issued
transmits R-APS messages indicating FS over both ring ports. R-APS
(FS) messages are continuously transmitted by this ring node while
the local FS command is the ring node’s highest priority command
(see Table 35-2 on page 1072 ). The R-APS (FS) message informs
other ring nodes of the FS command and that the traffic channel is
blocked on one ring port.
c.
A ring node accepting an R-APS (FS) message, without any local
higher priority requests unblocks any blocked ring port. This action
subsequently unblocks the traffic channel over the RPL.
d.
The ring node accepting an R-APS (FS) message, without any local
higher priority requests stops transmission of R-APS messages.
e.
The ring node receiving an R-APS (FS) message flushes its FDB.