1810 ExtremeWare Software 7.3.0 Command Reference Guide
MPLS Commands
configure vlan add track-lsp
configure vlan <vlan name> add track-lsp [<lsp_name> | ipaddress
<ipaddress>/<masklength>]
Description
Configures the LSPs tracked by ESRP in order to determine the ESRP state of the specified VLAN.
Syntax Description
Default
No diagnostic tracking.
Usage Guidelines
LSP tracking provides MPLS with specific ESRP selection criteria for determining the ESRP status of a
VLAN. LSP tracking is similar to route tracking and ping tracking in ESRP. ESRP can be configured to
protect the user VLAN from disruptions in the MPLS network core.
This type of LSP protection is especially useful when providing ESRP redundant TLS L2 VPN services
using Traffic Engineered LSPs that take completely different paths.
Using ESRP domains, LSP tracking can be easily scaled to support several TLS VLANs that are tunneled
across an L2 VPN using a single LSP. Instead of each TLS VLAN tracking the same LSP, all of the TLS
VLANs are placed into an ESRP domain for which there is one non-TLS VLAN, configured to track the
state of the LSP. When ESRP detects that the LSP has failed, all of the VLANs in the configured ESRP
domain transition to neutral state and the backup LSR becomes the master switch for all of the TLS
VLANs.
The
add track-lsp
command configures ESRP to track up to eight LSPs. Fail over to the slave switch
is based on the total number of established tracked LSPs. The switch with the greatest number of
established tracked LSPs is elected the master switch for the specified VLAN. Specifying the parameter
<
lsp_name>
instructs ESRP to track the status of an RSVP-TE LSP. Specifying the
ipaddress
keyword
instructs ESRP to track the LSP status for the IP prefix as defined by the
<ipaddress/masklength>
parameter. Both types of LSPs can be tracked simultaneously.
Example
The following command enables LSP route failure tracking for routes to the specified subnet:
configure vlan esrp-1 add track-lsp 192.168.46.0/24
History
This command was first available in an ExtremeWare IP Technology Services Release based on
v6.1.8b12.
vlan name Specifies an ESRP-enabled VLAN name.
lsp_name Specifies a LSP name.
ipaddress Specifies the IP address of the route entry to be tracked.
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