Users Guide

SPF algorithm executed 1 times
Area ranges are
OS10# show running-configuration ospf
!
router ospf 10
area 10.10.5.1 stub
Passive interfaces
A passive interface does not send or receive routing information. Configuring an interface as a passive interface suppresses
both receiving and sending routing updates.
Although the passive interface does not send or receive routing updates, the network on that interface is included in OSPF
updates sent through other interfaces.
1. Enter an interface type in INTERFACE mode.
interface ethernet node/slot/port[:subport]
2. Configure the interface as a passive interface in INTERFACE mode.
ip ospf passive
Configure passive interfaces
OS10(config)# interface ethernet 1/1/6
OS10(conf-if-eth1/1/6)# ip ospf passive
View passive interfaces
OS10# show running-configuration
!!!
!!
interface ethernet1/1/6
ip address 10.10.10.1/24
no switchport
no shutdown
ip ospf 100 area 0.0.0.0
ip ospf passive
!!
!
You can disable a passive interface using the no ip ospf passive command.
Fast convergence
Fast convergence sets the minimum origination and arrival LSA parameters to zero (0), allowing rapid route calculation. A higher
convergence level can result in occasional loss of OSPF adjacency.
Convergence level 1 meets most convergence requirements. The higher the number, the faster the convergence, and the more
frequent the route calculations and updates. This impacts CPU utilization and may impact adjacency stability in larger topologies.
NOTE: Select higher convergence levels only after checking with Dell EMC Technical Support.
When you disable fast-convergence, origination and arrival LSA parameters are set to 0 msec and 1000 msec, respectively.
Setting the convergence parameter from 1 to 4 indicates the actual convergence level. Each convergence setting adjusts the
LSA parameters to zero, but the convergence-level parameter changes the convergence speed. The higher the number,
the faster the convergence.
● Enable OSPFv2 fast-convergence and enter the convergence level in ROUTER-OSPF mode, from 1 to 4.
fast-converge convergence-level
Layer 3
935