Alcatel-Lucent 7705 Configuration Manual page 116

IP Router Command Reference
The above behavior is similar for static routes. If the static route is enabled for ldp-sync (see
static-route), the route is not enabled immediately after the interface to the next hop comes up. Routes
are suppressed until the LDP adjacency with the neighbor comes up and the synchronization timer
expires. The timer does not start until the LDP adjacency with the neighbor node is fully established.
For static routes, the ldp-sync-timer function requires LDP to use the interface address, not the system
address, as its transport address.
If the user changes the cost of an interface, the new value is advertised at the next flooding of link
attributes by IGP. However, if the LDP synchronization timer is still running, the new cost value will
only be advertised after the timer expires. Also, if the currently advertised cost is different, the new
cost value will be advertised after the user executes any of the following commands:
Refer to the 7705 SAR OS OAM and Diagnostics Guide for the tools commands and to the
7705 SAR OS Routing Protocols Guide for the OSPF and IS-IS commands.
If the user changes the value of the LDP synchronization timer parameter, the new value will take
effect at the next synchronization event. In other words, if the timer is still running, it will continue
using the previous value.
If parallel links exist to the same neighbor, the bindings and services should remain up as long as there
is one interface that is up. However, the user-configured LDP synchronization timer still applies on the
failed then restored interface. In this case, the 7705 SAR will only consider this interface for
forwarding after IGP re-advertises its actual cost value.
The LDP Sync Timer State is not always synced across to the standby CSM; therefore, after an activity
switch, the timer state might not be same as it was on the previously active CSM.
The no form of this command disables IGP-LDP synchronization and deletes the configuration.
Default
no ldp-sync-timer
Parameters seconds — the time interval for the IGP-LDP synchronization timer
116
• tools>perform>router>ospf>ldp-sync-exit
• tools>perform>router>isis>ldp-sync-exit
• config>router>interface>no ldp-sync-timer
• config>router>ospf>disable-ldp-sync
• config>router>isis>disable-ldp-sync
Note: If the ldp-sync-timer value is configured on the interface but LDP is not running on
the interface, the configuration will cause the IGP route cost to increase to the maximum
value.
Values 1 to 800
7705 SAR OS Router Configuration Guide