# Configuring Global OSPF properties

Use the following procedure to configure global OSPF parameters.

## Prerequisites

- Install the Advanced License.

- Enable IP routing globally on the switch.

- Assign an IP address to the VLAN that you want to enable with OSPF.

  Routing is automatically enabled on the VLAN when you assign an IP address to it.

## Procedure steps

1. From the navigation tree, double-click IP Routing.

2. In the IP Routing tree, double-click OSPF.

3. In the General tab, configure the parameters as required.

4. In the toolbar, click Apply.

## Variable definitions

The following table describes the fields of the General tab.

Field | Description
--- | ---
RouterId | Specifies the unique ID of the router in the Autonomous System.
AdminStat | Specifies the administrative status of OSPF on the router.
VersionNumber | Specifies the version of OSPF running on the router.
AreaBrdRtrStatus | Specifies whether this router is an Area Border Router.
ASBrdRtrStatus | Specifies whether this router is an Autonomous System Border Router.
ExternLsaCount | Specifies the number of external (link state type 5) link-state advertisements in the link state database.
ExternLsaCksumSum | Specifies the sum of the link state checksums of the external link state advertisements contained in the link state database. This sum determines if the link state database of the router changes, and compares the link state databases of two routers.
OriginateNewLsas | Specifies the number of new link state advertisements that the router originates. This number increments each time the router originates a new link state advertisement.
RxNewLsas | Specifies the number of link state advertisements received determined to be new instantiations. This number does not include newer instantiations of self-originated link state advertisements.
10MbpsPortDefaultMetric | Specifies the default metric of a 10 Mbps port. This is an integer value between 1 and 65535. Default value is 100.
100MbpsPortDefaultMetric | Specifies the default metric of a 100 Mbps port. This is an integer value between 1 and 65535. Default value is 10.
1000MbpsPortDefaultMetric | Specifies the default metric of a 1000 Mbps port. This is an integer value between 1 and 65535. Default value is 1.
10000MbpsPortDefault Metric | Specifies the default metric of a 10000 Mbps port. This is an integer value between 1 and 65535. Default value is 1.
TrapEnable | Specifies whether OSPF traps are enabled. The default setting is disabled.
AutoVirtLinkEnable | Specifies the status of OSPF automatic Virtual Link creation. The default setting is disabled.
SpfHoldDownTime | Specifies the SPF hold down timer value, which is an integer between 3 and 60. The default value is 10. The SPF runs, at most, once per hold down timer value.
OspfAction | Specifies an immediate OSPF action to take. Select runSpf and click Apply to initiate an immediate SPF run.
Rfc1583Compatibility | Controls the preference rules used when choosing among multiple Autonomous System external link state advertisements that advertise the same destination. When you enable this field, the preference rule will be the same as specified by RFC 1583. When disabled, the new preference rule, as described in RFC 2328, will apply. This potentially prevents the routing loops when Autonomous System external link state advertisements for the same destination have been originated from different areas.
LastSpfRun | Specifies the time the last SPF calculation was done.