Reference Guide

Version 8.3.7.0 Introduced on the S4810.
Version 7.8.1.0 Introduced on all platforms.
Usage
Information
The higher this parameter is set, the faster OSPF converge takes place.
NOTE: The faster the convergence, the more frequent the route calculations and updates.
This impacts 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.
C-Series, E-Series, S-Series, Z-Series, S4810
Syntax
flood-2328
To disable, use the no flood-2328 command.
Defaults Disabled.
Command Modes ROUTER OSPF
Command History
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.7.0 Introduced on the S4810.
Version 7.8.1.0 Added support for Multi-Process OSPF.
Version 7.6.1.0 Introduced on the S-Series.
Version 7.5.1.0 Introduced on the 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.
When you enable flood-2328, this command configures FTOS to flood LSAs on all
interfaces.
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