Configures LDP peer session timers for the switch.
| targeted | Specifies targeted LDP sessions. |
| link | Specifies link LDP sessions. |
| hello_hold_seconds | The amount of time (in seconds) that a hello message received from a neighboring LSR remains valid. The rate at which Hello messages are sent is 1/3 the configured hello-time. If a Hello message is not received from a particular neighboring LSR within the specified hello_hold_seconds, then the hello-adjacency is not maintained with that neighboring LSR. The range is 6 to 65,534 seconds. |
| keep_alive_hold_seconds | The time (in seconds) during which an LDP message must be received for the LDP session with a particular peer LSR to be maintained. If an LDP PDU is not received within the specified session keep_alive_hold_seconds, the corresponding LDP session is torn down. The range is 6 to 65,534 seconds. |
link hello_hold_seconds – 15 seconds
targeted hello_hold_seconds – 45 seconds
link keep_alive_hold_seconds – 40 seconds
targeted keep_alive_hold_seconds – 60 seconds
The LDP peer hello-adjacency timers are separately configurable for link and targeted LDP sessions. The hello timer parameter specifies the amount of time (in seconds) that a Hello message received from a neighboring LSR remains valid. The rate at which Hello messages are sent is 1/3 the configured hello-time. If a Hello message is not received from a particular neighboring LSR within the specified hello_hold_seconds, then the hello-adjacency is not maintained with that neighboring LSR.
The session keep_alive_hold_seconds parameter specifies the time (in seconds) during which an LDP message must be received for the LDP session to be maintained. The rate at which Keep Alive messages are sent, provided there are no LDP messages transmitted, is 1/6 the configured keep-alive-time. If an LDP PDU is not received within the specified session keep_alive_hold_seconds interval, the corresponding LDP session is torn down. The minimum and maximum values for hold timers are 6 and 65,534, respectively.
Changes to targeted timers only affect newly created targeted sessions. Disabling and then enabling VPLS or LDP causes all current targeted sessions to be re-created. The default values for the various times are as follows: link hello_hold_seconds (15), link keep_alive_hold_seconds (40), targeted hello_hold_seconds (45), and targeted keep_alive_hold_seconds (60). Changes to the link keep-alive timers do not take effect until the LDP session is cycled.
The following command configures link-level LDP hello adjacency hold time to 30 seconds and the keep alive time to 10 seconds:
configure mpls ldp timers link hello-time 30 keep-alive-time 10
This command was first available in ExtremeXOS 11.6.
This command is available only on the platforms that support MPLS as described in the Switch Engine 32.2 Feature License Requirements document.