D-Link DGS-1210-28X/ME [270/519] Config erps instance timer
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D-Link DGS-1210-28X/ME [270/519] Config erps instance timer

D-Link DGS-1210-12TS/ME [270/519] Config erps instance timer
DGS-1210 Metro Ethernet Managed Switch CLI Reference Guide
252
Description
The config erps instance protected_vlan commanmd is used to
configure the VLANs that are protected by the ERPS function.
The instance 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.
Parameters
protected_vlan [add | delete] – Specif
ies to add VLANs to the
protected VLAN group, or delete VLANs from the protected VLAN
group.
Restrictions Only Administrator, operator and power user-level users can issue
this command.
Example usage:
To configure the protected VLAN for a specific instance:
DGS-1210-28MP/ME:5# config erps instance 1 protected_vlan add vlanid 10-20
Command: config erps instance 1 protected_vlan add vlanid 10-20
Success.
DGS-1210-28MP/ME:5#
config erps instance timer
Purpose Used to configure the ERPS timers for a spe
cific physical ring’s
instance.
Syntax
config erps instance <value 1-16> timer [[ holdoff_time <integer
0-10000>] | [ guard_time <integer 10-2000>] | [ wtr_time <integer
1-12>]]
Description
The config erps instance timer commanmd is used to configure
the protocol timers.
• Holdoff Timer –
The Holdoff Timer is used to filter out
intermittent link faults when link failures occur during the
protection switching process. When a ring node detects a link
failure, it will start the holdoff timer and report the link failure
event (R-
APS BPDU with SF flag) after the link failure is
confirmed within the specified time period.
• Guard Timer – Guard Timer is used to prevent ring nodes from
receiving outdated R-APS messages. This timer is used during
the protection switchi
ng process after recovering from a link
failure. When the link node detects a link recovery, 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 will
be ignored by this ring node,
except in the case where there is a burst of three R-APS event
messages. This indicates that the sub-
ring topology has
changed, meaning that the node needs to flush the FDB that
has been received on the node. In this case, the recovered link
will not go into a blocking state. The Guard Timer should be
greater than the maximum expected forwarding delay for which
one R-APS message circles around the ring.
• WTR Timer –The WTR Timer is used to prevent the frequent
operation of the protection switch due to an intermittent defect.
This timer is used during the protection switching process

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