Alcatel-Lucent 6850-48 Network Guide

Configuring MPLS

Configuring MPLS

page 10-22

OmniSwitch AOS Release 6 Network Configuration Guide

To change the global keepalive timeout parameter value, use the 

 command and specify a timeout value, in seconds, and a factor number. For example:

-> configure router ldp interface-parameters keepalive 20 5

The above command configures a 20-second timeout period with a factor number of 5. The factor number 
specifies the number of keepalive messages to transmit during the timeout period. This number is then 
divided into the timeout value to determine the interval at which messages are sent. As a result, the 
keepalive timeout is set to 20 seconds with an interval of 4 seconds (20 divided by 5).

To configure the keepalive timeout parameter for a specific LDP interface, use the interface parameter 
with the configure router ldp interface-parameters keepalive command. For example:

-> configure router ldp interface-parameters interface vlan-40 keepalive 20 5

To set the keepalive timeout parameter back to the default value, use the no form of the configure router 
ldp interface-parameters keepalive command. For example:

-> configure router ldp interface-parameters no keepalive

-> configure router ldp interface-parameters interface vlan-40 no keepalive

The LDP interface keepalive timeout parameter value reverts back to the global value, which serves as the 
default value for LDP interfaces.

A targeted-LDP (T-LDP) session is a an LDP session that exists between two peers that are not directly 
connected to each other. When the LDP instance is enabled for the switch, global hello timeout and 
keepalive timeout parameter values are set by default for all T-LDP sessions. 

To change the hello timeout and interval for T-LDP sessions, use the 

 command. For example:

-> configure router ldp targeted-session hello 20 2

By default, the T-LDP hello timeout is 45 seconds and the timeout factor is 3. This calculates out to a hello 
interval value of 15, which means that every 15 seconds a hello timeout message is sent. 

To set the T-LDP hello timeout parameter back to the default value, use the no form of the configure 
router ldp targeted-session hello command. For example:

-> configure router ldp targeted-session no hello

To change the keepalive timeout and interval for T-LDP sessions, use the 

 command. For example:

-> configure router ldp targeted-session hello 20 2

By default, the T-LDP keepalive timeout is 40 seconds and the timeout factor is 4. This calculates out to a 
hello interval value of 10, which means that every 10 seconds a keepalive timeout message is sent. 

To set the T-LDP keepalive timeout parameter back to the default value, use the no form of the configure 
router ldp targeted-session keepalive command. For example:

-> configure router ldp targeted-session no keepalive