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DGS-3700 Series Layer 2 Managed Gigabit Ethernet Switch CLI Reference Guide
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config erps raps_vlan
Holdoff timer
-
Hold-off timer is used to filter out intermittent link faults when link
failure occurs. This timer is used during the protection switching process when link
failure occurs. When a ring node detects a link’s failure, it will start the hold off
timer. It will report the link failure event (R-APS BPDU with SF flag) after the link
failure is confirmed within this period of time.
Guard timer
-
Guard timer is used to prevent ring nodes from receiving outdated R-
APS messages. This timer is used during the protection switching process when
link failure recovers. When the link node detects that the link failure is recovered,
it will report the link failure recovery event (R-APS PDU with NR flag) and start
the guard timer before the guard timer expires. All received R-APS messages are
ignored by this ring node, except in the case where a burst of three R-APS event
messages that indicates the topology of a sub-ring has changed and the node needs
to flush the FDB received on the node. Therefore, the blocking state of the
recovered link will not be recovered within this period of time. This time should be
greater than the maximum expected forwarding delay for which one R-APS
message circles around the ring.
WTR timer
- WTR timer is used to prevent frequent operation of the protection
switch due to an intermittent defect. This timer is used during the protection
switching process when a link failure recovers. This timer is only used by the RPL
owner. When the RPL owner in protection state receives R-APS PDU with an NR
flag, it will start the WTR timer. The RPL owner will block the original unblocked
RPL port and start to send R-APS PDU with an RB flag after the link recovery is
confirmed within this period of time.
Parameters
<vlanid>
- The VLAN ID associated with the R-APS VLAN.
state
– specify the ring state.
enable
– enable the specified ring.
disable
– disable the specified ring.
ring_mel
- Specify the ring MEL of the R-APS function. The default ring MEL is 1.
<value 0-7>
- Specify a value between 0 and 7.
ring_port
- Specify a port participating in the ERPS ring.
west
- Specify the port as the west ring port.
virtual_channel
- Specifies the port as west port on virtual channel.
east
- Specify the port as the east ring port.
virtual_channel
- Specifies the port as east port on virtual channel.
rpl_port
- By default, the node has no RPL port.
west
- Specify the west ring port as the RPL port.
east
- Specify the east ring port as the RPL port.
none
- No RPL port on this node.
rpl_owner
- By default, the RPS owner is disabled.
enable
- Specify the device as an RPL owner node.
disable
- This node is not an RPL owner.
protected_vlan
- Specify VLANs that are protected by the ERPS function. The R-APS
VLAN cannot be the protected VLAN. The protected VLAN can be one that has
already been created, or it can be used for a VLAN that has not yet been created.
add
- Add VLANs to the protected VLAN group
delete
- Delete VLANs from the protected VLAN group.
vlanid
- Specify a VLAN ID list.
timer
- Configure the ERPS timers for a specific R-APS VLAN.
holdoff_time
- Specify the holdoff time of the R-APS function. The default hold off
time is 0 milliseconds.