l Immediate revertive switchover: The local PE immediately switches traffic to the master PW
and notifies the fault to the remote PE of the backup PW. The PE notifies the rectification
of the fault to the remote PE of the backup PW after the period of resume-time.
l Delayed revertive switchover: The PE switches traffic to the master PW after the period of
delay-time.
l None revertive switchover: The PE does not switch traffic to the master PW until the backup
PW is faulty.
For an asymmetric networking, in which ACs are of the Ethernet type, note the following:
l If the remote shutdown function is configured on the interface of a PE that connects a CE,
you are recommended not to use the policy of immediate revertive switchover, which may
lead to network flapping and traffic loss. On the other hand, you can use the policy of delayed
revertive switchover to set delay-time equal to or more than 30 seconds.
l If the Ethernet OAM function is configured on the interface of a PE that connects a CE, and
a revertive switchover policy is also configured, you cannot set resume-time to be 0 seconds,
but be equal to or longer than one second.
----End
5.9.6 Checking the Configuration
Procedure
l Run the display mpls l2vc [ vc-id | interface interface-type interface-number ] command
to view information about the local end of the Martini VC.
l Run the display mpls l2vc remote-info [ vc-id ] command to view information about the
remote end of the Martini VC.
l Run the display mpls l2vpn connection [ [ vpn-name [ remote-ce ce-id | down | up |
verbose ] ] | summary | [ interface interface-type interface-number ] ] command to view
information about the Kompella VLL.
l Run the display mpls l2vpn forwarding-info [ vc-label ] interface interface-type
interface-number command to view forwarding information about the L2VPN.
----End
Example
Run the display mpls l2vc [ vc-id | interface interface-type interface-number ] command, and
you can see that the status of the master and backup PWs is Up, the VC status of the master PW
is active, and VC status of the backup PW is inactive. The following is an example:
<Quidway> display mpls l2vc interface vlanif 300
*client interface : Vlanif300 is up
Administrator PW : no
session state : up
AC state : up
VC state : up
VC ID : 100
VC type : VLAN
destination : 11.11.11.11
local group ID : 0 remote group ID : 0
local VC label : 23552 remote VC label :
23552
local AC OAM State : up
local PSN State : up
Quidway S7700 Smart Routing Switch
Configuration Guide - VPN 5 VLL Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
482
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