Users Guide

Implementing OSPF with Dell
Networking OS
Dell Networking OS supports up to 10,000 OSPF routes. Within that 10,000, you can designate up to 8,000
routes as external and up to 2,000 as inter/intra area routes.
The S5000 supports up to 16 processes simultaneously.
Dell Networking OS supports Stub areas, Totally Stub (No Summary) and Not So Stubby Areas (NSSAs) and
supports the following LSAs:
• Router (type 1)
• Network (type 2)
• Network Summary (type 3)
• AS Boundary (type 4)
• AS External (type 5)
• NSSA External (type 7)
• Opaque Link-local (type 9)
Fast Convergence (OSPFv2, IPv4 Only)
Fast convergence allows you to define the speeds at which LSAs are originated and accepted, and reduce
OSPFv2 end-to-end convergence time.
Dell Networking OS allows you to accept and originate LSAa as soon as they are available to speed up route
information propagation.
NOTE: The faster the convergence, the more frequent the route calculations and updates. This impacts
CPU utilization and may impact adjacency stability in larger topologies.
Multi-Process OSPFv2 (IPv4 only)
Multi-Process OSPF is supported on the S5000 switch for OSPFv2 with IPv4 only.
Multi-process OSPF allows multiple OSPFv2 processes on a single router. Multiple OSPFv2 processes allow
for isolating routing domains, supporting multiple route policies and priorities in different domains, and
creating smaller domains for easier management. The S5000 support up to 16 OSPFv2 processes.
Each OSPFv2 process has a unique process ID and must have an associated router ID. There must be an equal
number of interfaces and must be in Layer-3 mode for the number of processes created. For example, if you
create five OSPFv2 processes on a system, there must be at least five interfaces assigned in Layer 3 mode.
Each OSPFv2 process is independent. If one process loses adjacency, the other processes continue to
function.
Open Shortest Path First (OSPFv2) 739