OSPFv3 Commands
ExtremeWare XOS 11.5 supports only the Summit X450 family of switches and the BlackDiamond 8800 series switch.
ExtremeWare XOS 11.5 Command Reference Guide
1638
configure ospfv3 virtual-link timer
configure ospfv3 {domain <domainName>} virtual-link {routerid} <router-
identifier> {area} <area-identifier> timer {retransmit-interval}
<retransmit-interval> {transit-delay} <transit-delay> {hello-interval}
<hello-interval> {dead-interval} <dead-interval>
Description
Configures the timers for a virtual link.
Syntax Description
Default
● retransmit interval—Default: 5 seconds
● transit delay—Default: 1 second
● hello interval—Default: 10 seconds
● dead interval—Default: 40 seconds
Usage Guidelines
In OSPFv3, all areas must be connected to a backbone area. If the connection to the backbone is lost, it
can be repaired by establishing a virtual link.
The smaller the hello interval, the faster topological changes will be detected, but more routing traffic
will ensue.
The setting of the retransmit interval should be conservative, or needless retransmissions will result.
The value should be larger for serial lines and virtual links.
The transmit delay value should take into account the transmission and propagation delays for the
interface.
domainName Specifies an OSPFv3 domain. OSPF-Default is the only one currently
supported.
router-identifier Specifies the router ID of the other end of the link.
area-identifier Specifies an OSPFv3 area, a four-byte, dotted decimal number.
retransmit-interval Specifies the length of time that the router waits before retransmitting an LSA
that is not acknowledged. The range is 1 - 3,600 seconds.
transit-delay Specifies the length of time it takes to transmit an LSA packet over the
interface. The range is 0 - 3,600 seconds.
hello-interval Specifies the interval at which routers send hello packets. The range is 1 -
65,535 seconds.
dead-interval Specifies the interval after which a neighboring router is declared down due to
the fact that hello packets are no longer received from the neighbor. The range
is 1 - 2,147,483,647 seconds.
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