Configuring IPv4 OSPFv2 Global Options in Gaia Portal

1. From the left navigation tree, click Advanced Routing > OSPF.

2. In the Global Options section, click Edit Global Options.

3. Configure the applicable settings.

   Description

   Parameter	Description
   SPF Delay	Configures the time to wait before recalculating the OSPF routing table after a change in the topology. Range: 1-60 seconds Default: 2 seconds
   SPF Hold Time	Configures the minimum time between recalculations of the OSPF routing table. Range: 1-60 seconds Default: 5 seconds
   Default ASE Route Cost	Configures a default cost to use when routes from other protocols are redistributed into OSPF as Autonomous System External (ASE) routes. This default is ignored for any redistributed routes, which already have a cost. If the route has a cost already specified, that cost takes precedent. Range: 1-6777215 Default: 1
   Default ASE Route Type	Configures the default route type to use when routes from other protocols are redistributed into OSPF as Autonomous System External (ASE) routes. This default is ignored for any redistributed routes, which already have a type. If the route has a type already specified, that type takes precedent. A type 1 route is internal and its metric can be used directly by OSPF for comparison. A type 2 route is external and is assumed to have a greater cost than any internal route. Range: Type 1, or Type 2 Default: 1
   RFC 1583 Compatibility	Configures the RFC 1583 backward compatibility mode. This implementation of OSPF is based on RFC 2178, which fixed some looping problems in earlier specifications. Best Practice - If this implementation runs in an environment with implementations based on RFC 1583 or earlier, then enable this option to ensure backwards compatibility. Range: Selected, or Cleared Default: Selected
   Graceful Restart Helper	Graceful Restart enables this router to act as a helper for other routers when they undergo a graceful restart. When a grace LSA is received from a neighbor, the neighbor is kept in the forwarding path with full adjacency till either the grace-period (advertised in the grace LSA) expires, or there is a topology change. The helper functionality is supported for both planned and unplanned restarts. Note - Graceful Restart is not compatible with VRRP Preempt Mode. You must disable VRRP Preempt Mode before you enable this option. Range: Selected, or Cleared Default: Cleared
   Graceful Restart	Configures Graceful Restart for this router. To disable, clear this option. To enable, select this option and configure the Grace Period - enter a value between 1 and 1800 seconds. The default grace period is 120 seconds. The Graceful Restart option causes this router to act as a re-starting router according to RFC 3623. The re-starter functionality is supported for both planned and unplanned restarts for both IPv4 OSPFv2 and IPv6 OSPFv3 when using VRRP and OSPFv3 only when using ClusterXL. Notes: Graceful Restart is not compatible with VRRP Preempt Mode. You must disable VRRP Preempt Mode before you enable this option. In ClusterXL, the re-starter functionality is supported for both planned and unplanned restarts for IPv6 OSPFv3 only. In VRRP Cluster, the re-starter functionality is supported for both planned and unplanned restarts for both IPv4 OSPFv2 and IPv6 OSPFv3. Range: Selected, or Cleared Default: Cleared
   Force Hellos	Enabling this feature sends out forced Hello packets at the specified interval when the Dynamic Routing Daemon is busy processing updates or synching data to standby nodes. These extra Hello packets are in addition to the typical hello packets in OSPF. This feature is required to maintain neighbor adjacencies when processing large number of updates. To disable, clear this option. To enable, select this option and configure the Force Hellos Timer - enter a value between 2 and 10 seconds. The timer is 5 seconds. Range: Selected, or Cleared Default: Cleared

4. Click Save.