Associating Track with VPLS
About Track association with VPLS
When you associate Track with an AC on a VPLS network, the AC is up only when one or more of the associated track entries are positive.
Associating Track with an AC helps detect AC failures. For example, when an AC is a VE-L2VPN interface, the AC interface will not go down upon a link failure because the interface is a virtual interface. To resolve the problem, you can associate Track with the AC to detect failures on the link that connects the PE-agg to the L3VPN or IP backbone. When a failure occurs on the link, the VE-L2VPN interface is set to down. Consequently, the PW bound to the AC goes down. If the PW has a backup PW, traffic can be switched to the backup PW. For more information about VE-L2VPN interfaces and L2VPN access to L3VPN or IP backbone, see MPLS Configuration Guide.
An AC can be one of the following types:
Layer 3 interface.
Ethernet service instance on a Layer 2 Ethernet interface or Layer 2 aggregate interface.
Associating a Layer 3 interface with a track entry
Enter system view.
system-view
Enter Layer 3 interface view.
interface interface-type interface-number
Bind the interface to a VSI and associate it with a track entry.
xconnect vsi vsi-name [ hub ] track track-entry-number&<1-3>
By default, a Layer 3 interface is not bound to any VSI or associated with any track entries.
Associating an Ethernet service instance with a track entry
Enter system view.
system-view
Enter Layer 2 Ethernet interface view or Layer 2 aggregate interface view.
Enter Layer 2 Ethernet interface view.
interface interface-type interface-number
Enter Layer 2 aggregate interface view.
interface bridge-aggregation interface-number
Create an Ethernet service instance and enter Ethernet service instance view.
service-instance instance-id
Bind the Ethernet service instance to a VSI and associate it with a track entry.
xconnect vsi vsi-name [ access-mode { ethernet | vlan } | hub ] * [ track track-entry-number&<1-3> ]
By default, an Ethernet service instance is not bound to any VSI or associated with any track entries.