Command Line Reference Guide

1028 | Open Shortest Path First (OSPFv2 and OSPFv3)
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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 Networking 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
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, Dell Networking OS 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 flood-2328 is enabled, this command configures Dell Networking OS to flood LSAs on all
interfaces.
graceful-restart grace-period
c e s
Specifies the time duration, in seconds, that the router’s neighbors will continue to advertise the router
as fully adjacent regardless of the synchronization state during a graceful restart.
Syntax
graceful-restart grace-period seconds
To disable the grace period, enter no graceful-restart grace-period.
Parameters
Defaults
Not Configured
Version 7.8.1.0 Introduced support for Multi-Process OSPF.
Version 7.6.1.0 Introduced on S-Series
Version 7.5.1.0 Introduced on C-Series and E-Series
seconds
Time duration, in seconds, that specifies the duration of the restart process
before OSPF terminates the process.
Range: 40 to 3000 seconds