Dell Force10 S25N-S50N FTOS Command Line Reference Guide FTOS 8.4.2.7 E-Series - Page 1019

fast-convergence c e s 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-convergence {number} To cancel fast-convergence, enter no fast convergence. 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 7.8.1.0 Introduced on all platforms. 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 c e s Enable RFC-2328 flooding behavior. Syntax flood-2328 To disable, use the no flood-2328 command. Defaults Disabled Command Modes ROUTER OSPF Command History Version 7.8.1.0 Version 7.6.1.0 Version 7.5.1.0 Introduced support for Multi-Process OSPF. Introduced on S-Series Introduced on C-Series and E-Series Usage Information 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. By default, FTOS implements an enhanced flooding procedure that dynamically and intelligently determines when to optimize flooding. Whenever possible, the OSPF task attempts to reduce flooding overhead by selectively flooding on a subset of the interfaces between two routers. Open Shortest Path First (OSPFv2 and OSPFv3) | 1019