Administrator Guide

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.
Enabling OSPFv2
To enable Layer 3 routing, assign an IP address to an interface (physical or Loopback). By default, OSPF, similar to all routing protocols, is
disabled.
You must configure at least one interface for Layer 3 before enabling OSPFv2 globally.
If implementing multi-process OSPF, create an equal number of Layer 3 enabled interfaces and OSPF process IDs. For example, if you
create four OSPFv2 process IDs, you must have four interfaces with Layer 3 enabled.
1. Assign an IP address to an interface.
CONFIG-INTERFACE mode
ip address ip-address mask
The format is A.B.C.D/M.
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Open Shortest Path First (OSPFv2 and OSPFv3)