Deployment Guide

Configuration Information
The interfaces must be in Layer 3 mode (assigned an IP address) and enabled so that they can send and receive traffic. The
OSPF process must know about these interfaces.
To make the OSPF process aware of these interfaces, they must be assigned to OSPF areas.
You must configure OSPF GLOBALLY on the system in CONFIGURATION mode.
NOTE: Loop back routes are not installed in the Route Table Manager (RTM) as non-active routes.
OSPF features and functions are assigned to each router using the CONFIG-INTERFACE commands for each interface.
NOTE: By default, OSPF is disabled.
Configuration Task List for OSPFv2 (OSPF for IPv4)
You can perform the following tasks to configure Open Shortest Path First version 2 (OSPF for IPv4) on the switch. Two of the
tasks are mandatory; others are optional.
The following configuration tasks include two mandatory tasks and several optional tasks:
● Enabling OSPFv2 (mandatory)
● Assigning a Router ID
● Assigning an OSPFv2 Area (mandatory)
● Enable OSPFv2 on Interfaces
● Configuring Stub Areas
● Enabling Passive Interfaces
● Enabling Fast-Convergence
● Changing OSPFv2 Parameters on Interfaces
● Enabling OSPFv2 Authentication
● Creating Filter Routes
● Applying Prefix Lists
● Redistributing Routes
● Troubleshooting OSPFv2
1. Configure a physical interface. Assign an IP address, physical or Loopback, to the interface to enable Layer 3 routing.
2. Enable OSPF globally. Assign network area and neighbors.
3. Add interfaces or configure other attributes.
4. Set the time interval between when the switch receives a topology change and starts a shortest path first (SPF) calculation.
Use timers spf delay holdtime
NOTE:
To set the interval time between the reception of topology changes and calculation of SPF in milli seconds, use
the timers spf delay holdtime msec command.
Example
DellEMC#
DellEMC#conf
DellEMC(conf)#router ospf 1
DellEMC(conf-router_ospf-1)#timer spf 2 5 msec
DellEMC(conf-router_ospf-1)#
DellEMC(conf-router_ospf-1)#show config
!
router ospf 1
timers spf 2 5 msec
DellEMC(conf-router_ospf-1)#
DellEMC(conf-router_ospf-1)#end
DellEMC#
For a complete list of the OSPF commands, refer to the OSPF section in the Dell EMC Networking OS Command Line
Reference Guide document.
Open Shortest Path First (OSPFv2 and OSPFv3)
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