Extreme Networks ExtremeWare XOS 11.3, Manual

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Configuring OSPF
ExtremeWare XOS 11.3 Concepts Guide
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enable ospf export [bgp | direct | e-bgp | i-bgp | rip | static] [cost <cost> type
[ase-type-1 | ase-type-2] {tag <number>} | <policy-map>]
disable ospf export [bgp | direct | e-bgp | i-bgp | rip | static]
These commands enable or disable the exporting of RIP, static, and direct routes by way of LSA to other
OSPF routers as AS-external type 1 or type 2 routes. The default setting is disabled.
The cost metric is inserted for all Border Gateway Protocol (BGP), RIP, static, and direct routes injected
into OSPF. If the cost metric is set to 0, the cost is inserted from the route. For example, in the case of
BGP export, the cost equals the multiple exit discriminator (MED) or the path length. The tag value is
used only by special routing applications. Use 0 if you do not have specific requirements for using a
tag. (The tag value in this instance has no relationship with IEEE 802.1Q VLAN tagging.)
The same cost, type, and tag values can be inserted for all the export routes, or policies can be used for
selective insertion. When a policy is associated with the export command, the policy is applied on every
exported route. The exported routes can also be filtered using policies.
Verify the configuration using the command:
show ospf
OSPF Timers and Authentication
Configuring OSPF timers and authentication on a per area basis is a shortcut to applying the timers and
authentication to each VLAN in the area at the time of configuration. If you add more VLANs to the
area, you must configure the timers and authentication for the new VLANs explicitly. Use the
command:
configure ospf vlan [<vlan-name> | all] timer <retransmit-interval> <transit-delay>
<hello-interval> <dead-interval> {<wait-timer-interval>}
Configuring OSPF
Each switch that is configured to run OSPF must have a unique router ID. Extreme Networks
recommends that you manually set the router ID of the switches participating in OSPF, instead of
having the switch automatically choose its router ID based on the highest interface IP address. Not
performing this configuration in larger, dynamic environments could result in an older LSDB remaining
in use.
Configuring OSPF Wait Interval
ExtremeWare XOS allows you to configure the OSPF wait interval, rather than using the router dead
interval.
CAUTION
Do not configure OSPF timers unless you are comfortable exceeding OSPF specifications. Non-standard settings may
not be reliable under all circumstances.
To specify the timer intervals, use the following commands: