Modifying Ldp Interface Parameters - Alcatel-Lucent OmniSwitch 6850-48 Network Configuration Manual

Configuring MPLS
To delete an LDP interface, first make sure the interface is administratively disabled. If necessary, use the
configure router ldp interface-parameters interface shutdown
example:
-> configure router ldp interface-parameters interface vlan-40 shutdown
Once the LDP interface is disabled, use the no form of the configure router ldp interface-parameters
interface command to delete the interface. For example:
-> configure router ldp interface-parameters no interface vlan-40

Modifying LDP Interface Parameters

By default, the following global LDP interface parameters are set when the LDP instance is activated for
the router.
•
Hello Timeout and Interval—Specifies how long LDP waits to receive hello messages from a peer
before declaring that the peer is down. The hello interval determines how often LDP sends out hello
messages, which advertise the hello timeout value for the local router. The default timeout is 15
seconds and the default interval is 5 seconds.
•
Keepalive Timeout and Interval—Specifies how long LDP waits to receive keepalive messages from
an LDP peer before tearing down the session with that peer. The keepalive interval determines how
often LDP sends out keepalive messages, which advertise the keepalive timeout value for the local
router. The default timeout is 30 seconds and the default interval is 10 seconds.
When an LDP interface is created, the interface inherits the above default values for these parameters.
Modifying these parameter values is allowed at both the global level and at the interface level. Note that
parameter values configured for a specific interface override the global parameter values.
Modifying the Hello Timeout
To change the global hello timeout parameter value, use the
hello command and specify a timeout value, in seconds, and a factor number. For example:
-> configure router ldp interface-parameters hello 40 2
The above command configures a 40-second timeout period with a factor number of 2. The factor number
specifies the number of hello messages to transmit during the timeout period. This number is divided into
the timeout value to determine the interval at which messages are sent. As a result, the hello timeout is set
to 40 seconds with an interval of 20 seconds (40 divided by 2).
To configure the hello timeout parameter for a specific LDP interface, use the interface parameter with
the configure router ldp interface-parameters hello command. For example:
-> configure router ldp interface-parameters interface vlan-40 hello 50 10
To set the hello timeout parameter back to the default value, use the no form of the configure router ldp
interface-parameters hello command. For example:
-> configure router ldp interface-parameters no hello
-> configure router ldp interface-parameters interface vlan-40 no hello
The LDP interface helot timeout parameter value reverts back to the global value, which serves as the
default value for all LDP interfaces.
OmniSwitch AOS Release 6 Network Configuration Guide
command to disable the interface. For
configure router ldp interface-parameters
September 2009
Configuring MPLS
page 10-21