Configuring NBMA interface neighbors

Configure NBMA neighbors so that the interface can participate in designated router election. All neighbors that you manually insert on the Neighbors tab are NBMA neighbors.

Before you begin

  • Enable OSPF globally.

  • Ensure that the interface uses an IP address.

  • Ensure that the interface type is NBMA.

  • 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

  1. In the navigation pane, expand Configuration > IP.
  2. Click OSPF.
  3. Click the Neighbors tab.
  4. Click Insert.
  5. Enter the IP address and priority for the first neighbor.
  6. Click Insert.
  7. Add all required neighbors.
  8. Click Apply.

Neighbors field descriptions

Use the data in the following table to use the Neighbors tab.

Name

Description

NbrIpAddr

Specifies the neighbor IP address.

AddressLessIndex

Indicates addressed and addressless interfaces. This value is 0 on an interface with an IP address. On addressless interfaces, the corresponding value of ifIndex in the Internet standard management information base (MIB).

NbrRtrId

Specifies the router ID of the neighboring router. The router ID has the same format as an IP address but identifies the router independent of its IP address.

Options

Specifies the bit mask that corresponds to the neighbor options parameter.

Priority

Specifies the priority.

State

Specifies the OSPF interface state.

Events

Specifies the number of state changes or error events that occur between the OSPF router and the neighbor router.

Retransmission Queue Length

Specifies the number of elapsed seconds between advertising retransmissions of the same packet to a neighbor.

ospfNbmaNbrPermanence

Indicates whether the neighbor is a manually configured NBMA neighbor; permanent indicates it is an NBMA neighbor.

HelloSuppressed

Indicates whether hello packets to a neighbor are suppressed.

RestartHelperStatus

Specifies whether the router is acting as a graceful restart helper for the neighbor.

RestartHelperAge

Specifies the remaining time in the current OSPF graceful restart interval, if the router is acting as a restart helper for the neighbor.

RestartHelperExitReason

Specifies the outcome of the last attempt at acting as a graceful restart helper for the neighbor.
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