Configure a Manual Virtual Interface
Use manual virtual links (interfaces) to provide a backup link for vital OSPF traffic with a minimum of resource use.
Before you begin
Enable OSPF globally.
Change the VRF instance as required to configure OSPF on a specific VRF instance. The VRF must have an RP trigger of OSPF. Not all parameters are configurable on non-default VRFs.
Procedure
Virtual If Field Descriptions
Use the data in the following table to use the Virtual If tab.
Name |
Description |
---|---|
AreaId |
Specifies the transit area ID that the virtual link traverses. |
Neighbor |
Specifies the router ID of the virtual neighbor. |
TransitDelay |
Specifies the estimated number of seconds required to transmit a link-state update packet over this interface. The default is 1. |
RetransInterval |
Specifies the number of seconds between link-state advertisement, and retransmissions for adjacencies that belong to this interface. This variable also applies to DD and link-state request packets. This value must exceed the expected round-trip time. The default is 5. |
HelloInterval |
Specifies the length of time, in seconds, between the hello packets that the router sends on the interface. This value must be the same for the virtual neighbor. The default is 10. |
RtrDeadInterval |
Specifies the number of seconds that expires before neighbors declare the router down. This value must be a multiple of the hello interval. This value must be the same for the virtual neighbor. The default is 60. |
State |
Specifies the OSPF virtual interface state. |
Events |
Specifies the number of state changes or error events on this virtual Link. |
AuthType |
Specifies the authentication type specified for a virtual interface. You can locally assign additional authentication types. The default is none. |
AuthKey |
Specifies the authentication password. If AuthType is a simple password, the device adjusts and zeros fill the eight octets. Unauthenticated interfaces need no authentication key, and simple password authentication cannot use a key with more than eight octets. |
LsaCount |
Specifies the total number of link state advertisements in this virtual interface LSDB. |
LsaCksumSum |
Specifies the number of link-state advertisements. The sum determines if a change occurred in a virtual interface LSDB and compares the virtual interfaceLSDB of the virtual neighbors. |