Vyatta Network OS Documentation

Learn how to install, configure and operate the Vyatta NOS, which helps drive our virtual networking & physical platforms portfolio.

protocols ospf area <area-id> virtual-link <ipv4> hello-interval <interval>

Sets the interval between OSPF hello packets on a virtual link.

set protocols ospf [ process pid ] area area-id virtual-link ipv4 hello-interval interval
delete protocols ospf [ process pid ] area area-id virtual-link ipv4 hello-interval
show protocols ospf [ process pid ] area area-id virtual-link ipv4 hello-interval

Hello packets are sent every 10 seconds.

process pid
Specifies the PID of an IPv4 OSPF process.
area-id
The ID of the OSPF area being configured, expressed as an IP address or a decimal value.
ipv4
The area ID of the virtual link, expressed as an IPv4 address.
interval
The interval, in seconds, between hello packets. This interval must be the same for all nodes on the network. The interval ranges from 1 through 65535. The default interval is 10 seconds.

Configuration mode

protocols {
	ospf {
		area area-id {
			virtual-link ipv4 {
				hello-interval interval
			}
		}
	}
}

Use this command to set the interval at which OSPF hello packets are sent for a virtual link.

A hello packet is an OSPF packet that detects and maintains relationships with neighbors on the same network (directly connected routers). The greater the interval between hello packets, the less router traffic occurs, but the longer it takes for topological changes to be detected.

The hello interval must be the same for all routers that are to establish two-way communication within a network. If two routers do not agree on these parameters, they do not establish adjacencies and disregard communication from each other.

Use the set form of this command to set the interval between OSPF hello packets on a virtual link.

Use the delete form of this command to restore the default interval, which is 10 seconds, between OSPF hello packets on a virtual link.

Use the show form of this command to display the interval between OSPF hello packets on a virtual link.