Dell C9000 series, Reference Manual, Page: 1481 / 2286

Open Shortest Path First (OSPFv2
and OSPFv3)
Open Shortest Path First (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.
On Tunnel interfaces, OSPFv2 is supported on IPv6 tunnels only and OSPFv3 is supported on IPv4 tunnels
only.
This chapter 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 Commands
• OSPFv3 Commands
OSPF on Tunnel Interfaces:
NOTE: The Dell 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 Networking OS version 7.8.1.0 is modified. In earlier
versions, multiple OSPF processes were created without VRF (prior to 9.4 release). In Dell Networking OS
version 9.4 and version 9.7 (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.
Topics:
• OSPFv2 Commands
• OSPFv3 Commands
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