API Guide

Open Shortest Path First (OSPFv2 and
OSPFv3)
Open Shortest Path First version 2 for IPv4 is supported on platform.
OSPF is an interior gateway protocol (IGP), which means that it distributes routing information between routers in a single
autonomous system (AS). OSPF is also a link-state protocol in which all routers contain forwarding tables derived from
information about their links to their neighbors.
The fundamental mechanisms of OSPF (flooding, DR election, area support, SPF calculations, and so on) are the same for
OSPFv2 and OSPFv3. OSPFv3 runs on a per-link basis instead of on a per-IP-subnet basis.
The Dell EMC Networking OS versions 9.4(0.0) and 9.7(0.0) introduce support for VRF on OSPFv2 and OSPFv3 respectively.
The multi-process OSPF feature supported on Dell EMC Networking OS version 7.8.1.0 is modified. In earlier versions, multiple
OSPF processes were created without VRF (prior to 9.4(0.0)). In the Dell EMC Networking OS versions 9.4(0.0) and 9.7(0.0)
(for OSPFv3), multiple OSPF processes can be created on a router, but with only one OSPF process per VRF. However, there
can be one OSFPv2 and one OSPFv3 on the same VRF.
This section is divided into two sections. There is no overlap between the two sets of commands. You cannot use an OSPFv2
command in the IPv6 OSPFv3 mode. OSPFv2 is supported on IPv4 tunnels only and OSPFv3 is supported on IPv6 tunnels only.
Topics:
• OSPFv2 Commands
• OSPFv3 Commands
OSPFv2 Commands
The Dell EMC Networking implementation of OSPFv2 is based on IETF RFC 2328. .
area default-cost
Set the metric for the summary default route the area border router (ABR) generates into the stub area. Use this command on
the border routers at the edge of a stub area.
S3048–ON
Syntax
area area-id default-cost cost
To return default values, use the no area area-id default-cost command.
Parameters
area-id Specify the OSPF area in dotted decimal format (A.B.C.D.) or enter a number from
zero (0) to 65535.
cost Specifies the stub area’s advertised external route metric. The range is from zero
(0) to 65535.
Defaults cost = 1; no areas are configured.
Command Modes ROUTER OSPF
Command
History
This guide is platform-specific. For command information about other platforms, see the relevant Dell
EMC Networking OS Command Line Reference Guide.
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