Mpls Lsp Trigger Information - D-Link DGS-3630 Series Reference Manual

DGS-3630 Series Layer 3 Stackable Managed Switch Web UI Reference Guide
Parameter
Hop Count Limit
Authentication
PHP
Trap Status
Graceful Restart
Neighbor Liveness Time
Recovery Time
Click the Apply button to accept the changes made.

MPLS LSP Trigger Information

This window is used to display and configure the MPLS Label-Switched Path (LSP) trigger information. The LSP
trigger filter rules are IP access list rules that it is used to control the IP routes that can be used to trigger the
establishment of an LSP.
To view the following window, click MPLS > MPLS LSP Trigger Information, as shown below:
Description
Select the Default option to use the default value, which is 254.
Enter the hop count limit here. The range is from 1 to 255. This feature is used to
configure the maximum number of hops permitted in the LSP setup.
Select the Default option to use the default value, which is 254.
Select to enable or disable the authentication feature here. If the LDP MD5
authentication is enabled, the LSR applies the MD5 algorithm to compute the
MD5 digest for the TCP segment that will be sent to the peer. This computation
makes use of the peer password as well as the TCP segment. When the LSR
receives a TCP segment with an MD5 digest, it validates the segment by
calculating the MD5 digest (using its own record of the password) and compares
the computed digest with the received digest. If the comparison fails, the segment
is dropped without any response to the sender. The LSR ignores LDP Hellos from
any LSR for which a password has not been configured.
Select the Penultimate Hop Popping (PHP) behavior here. Options to choose
from are Implicit Null and Explicit Null. If the egress router advertises the
Implicit Null label, the upstream will do PHP. If the egress router advertises the
Explicit Null label, the upstream will keep the outer label without popping.
Select to enable or disable the LDP trap feature here.
Select to enable or disable the graceful restart feature here. LDP graceful restart
provides a mechanism that helps to minimize the negative effects on MPLS traffic
caused by the Label Switching Router's (LSR) control plane restart. It extends the
LDP to preserve the MPLS forwarding state during LDP session recovery, so that
the data plane is not impacted. The graceful restart will be used by the LDP
session only when both local and peer are enabled.
Enter the neighbor liveness time value here. When the device detects that its LDP
session with a neighbor went down, it tries to re-establish LDP communication
with the neighbor in the reconnection time. The reconnection time is set according
to the lesser of the FT reconnect timeout value advertised by the neighbor and the
local neighbor liveness time. If the LDP session cannot be established within the
reconnection time, all associated stale label forwarding entries will be deleted. If
LDP graceful restart is enabled, the advertised FT reconnect timeout is set
according to the neighbor liveness time value. The range is from 5 to 300
seconds.
Select the Default option to use the default value.
Enter the recovery time value here. If LDP graceful restart is enabled and an LDP
session is re-established, the device will complete the exchange of the label
mapping information with its neighbor within the recovery time. After the recovery
timer expired, the device will delete all label forwarding entries that are marked
stale. The range is from 12 to 600 seconds.
Select the Default option to use the default value.
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