Dell Z9000 Configuration Manual page 568

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.
Examples of the fast-converge Command
In the examples below, Convergence Level shows the fast-converge parameter setting and Min LSA
origination shows the LSA parameters (shown in bold).
Dell(conf-router_ospf-1)#fast-converge 2
Dell(conf-router_ospf-1)#ex
Dell(conf)#ex
Dell#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
Dell#
The following examples shows how to disable fast-convergence.
Dell#(conf-router_ospf-1)#no fast-converge
Dell#(conf-router_ospf-1)#ex
Dell#(conf)#ex
Dell##show ip ospf 1
568
Open Shortest Path First (OSPFv2 and OSPFv3)