Deployment Guide

Neighbor Count is 0, Adjacent neighbor count is 0
TenGigabitEthernet 2/1/1 is up, line protocol is down
Internet Address 10.1.3.100/24, Area 2.2.2.2
Process ID 34, Router ID 10.1.2.100, Network Type BROADCAST, Cost: 10
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 10.1.2.100, Interface address 10.1.3.100
Backup Designated Router (ID) 0.0.0.0, Interface address 0.0.0.0
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
No Hellos (Passive interface)
Neighbor Count is 0, Adjacent neighbor count is 0
Loopback 45 is up, line protocol is up
Internet Address 10.1.1.23/24, Area 2.2.2.2
Process ID 34, Router ID 10.1.2.100, Network Type LOOPBACK, Cost: 1
Enabling Fast-Convergence
The fast-convergence CLI sets the minimum origination and arrival LSA parameters to zero (0), allowing rapid route calculation.
When you disable fast-convergence, origination and arrival LSA parameters are set to 5 seconds and 1 second, 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 fast-convergence parameter setting allows for even finer tuning of the convergence
speed. The higher the number, the faster the convergence.
To enable or disable fast-convergence, use the following command.
● Enable OSPF fast-convergence and specify the convergence level.
CONFIG-ROUTEROSPF- id mode
fast-convergence {number}
The parameter range is from 1 to 4.
The higher the number, the faster the convergence.
When disabled, the parameter is set at 0.
NOTE:
A higher convergence level can result in occasional loss of OSPF adjacency. Generally, convergence level 1
meets most convergence requirements. Only select higher convergence levels following consultation with Dell Technical
Support.
In the following examples, Convergence Level shows the fast-converge parameter setting and Min LSA origination
shows the LSA parameters (shown in bold).
DellEMC(conf-router_ospf-1)#fast-converge 2
DellEMC(conf-router_ospf-1)#ex
DellEMC(conf)#ex
DellEMC#show ip ospf 1
Routing Process ospf 1 with ID 192.168.67.2
Supports only single TOS (TOS0) routes
SPF schedule delay 5 secs, Hold time between two SPFs 10 secs
Convergence Level 2
Min LSA origination 0 secs, Min LSA arrival 0 secs
Number of area in this router is 0, normal 0 stub 0 nssa 0
DellEMC#
The following examples shows how to disable fast-convergence.
DellEMC#(conf-router_ospf-1)#no fast-converge
DellEMC#(conf-router_ospf-1)#ex
DellEMC#(conf)#ex
DellEMC##show ip ospf 1
Routing Process ospf 1 with ID 192.168.67.2
Supports only single TOS (TOS0) routes
SPF schedule delay 5 secs, Hold time between two SPFs 10 secs
Convergence Level 0
Min LSA origination 5 secs, Min LSA arrival 1 secs
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Open Shortest Path First (OSPFv2 and OSPFv3)