ESR routers have the ability to flexibly configure Hello holdtime, Hello interval and Keepalive holdtime settings.
Let's consider an example of configuring Hello holdtime for an LDP session:
ESR# show run mpls
mpls
ldp
router-id 4.4.4.4
discovery hello holdtime 40
address-family ipv4
interface gigabitethernet 1/0/4
discovery hello holdtime 60
exit
exit
enable
exit
If the Hello Holdtime and Hello Interval parameters are not specified, the default values are used. If parameters
are specified, the priority of values for address-family will be higher than for globally configured values.
ESR# show mpls ldp discovery detailed
Local LDP ID: 4.4.4.4
Discovery sources:
Interfaces:
gigabitethernet 1/0/4:
Hello interval: 5 seconds
Transport IP address: 4.4.4.4
LDP ID: 1.1.1.1
Source IP address: 10.10.10.1
Transport IP address: 1.1.1.1
Hold time: 15 seconds
Proposed hold time: 60 /15 (local/peer) seconds
The parameters configured in address-family can be configured for each individual interface participating in
the LDP process.
ESR# show running-config mpls
mpls
ldp
router-id 4.4.4.4
discovery hello holdtime 50
discovery hello interval 10
address-family ipv4
interface gigabitethernet 1/0/1
discovery hello holdtime 60
discovery hello interval 20
exit
interface gigabitethernet 1/0/4
discovery hello holdtime 30
discovery hello interval 10
exit
exit
enable
exit
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