Dell Force10 MXL Blade MXL 10/40GbE Switch IO Module FTOS Command Line Referen - Page 396
fast-converge, flood-2328
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www.dell.com | support.dell.com Usage Information The distribute-list out command applies to routes being redistributed by autonomous system boundary routers (ASBRs) into OSPF. It can be applied to external type 2 and external type 1 routes, but not to intra-area and inter-area routes. fast-converge This command sets the minimum LSA origination and arrival times to zero (0), allowing more rapid route computation so that convergence takes less time. Syntax fast-converge {number} To cancel fast-convergence, use the no fast converge command. Parameters number Enter the convergence level desired. The higher this parameter is set, the faster OSPF converge takes place. Range: 1-4 Defaults none Command Modes ROUTER OSPF Command History Version 8.3.16.1 Introduced on MXL 10/40GbE Switch IO Module Usage Information The higher this parameter is set, the faster OSPF converge takes place. Note that the faster the convergence, the more frequent the route calculations and updates. This will impact CPU utilization and may impact adjacency stability in larger topologies. Generally, convergence level 1 meets most convergence requirements. Higher convergence levels should only be selected following consultation with Dell Force10 Technical Support. flood-2328 Enable RFC-2328 flooding behavior. Syntax flood-2328 To disable, use the no flood-2328 command. Defaults Disabled Command Modes ROUTER OSPF Command History Usage Information Version 8.3.16.1 Introduced on MXL 10/40GbE Switch IO Module In OSPF, flooding is the most resource-consuming task. The flooding algorithm, described in RFC-2328, requires that OSPF flood LSAs (Link State Advertisements) on all interfaces, as governed by LSA's flooding scope (see Section 13 of the RFC). When multiple direct links connect two routers, the RFC-2328 flooding algorithm generates significant redundant information across all links. 396 | Open Shortest Path First (OSPFv2)