Version
Description
8.3.7.0
Introduced on the S4810.
7.8.1.0
Added support for Multi-Process OSPF.
7.6.1.0
Introduced on the S-Series.
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, 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 you enable
flood-2328
, this command configures Dell Networking OS to flood LSAs on all interfaces.
graceful-restart grace-period
Specifies the time duration, in seconds, that the router’s neighbors continue to advertise the router as fully adjacent regardless of the
synchronization state during a graceful restart.
NOTE:
This command enables OSPFv2 graceful restart globally by setting the grace period (in seconds) that an OSPFv2 router’s
neighbors continues to advertise the router as adjacent during a graceful restart.
Syntax
graceful-restart grace-period
seconds
To disable the grace period, use the
no graceful-restart grace-period
command.
Parameters
seconds
Time duration, in seconds, that specifies the duration of the restart process before OSPF
terminates the process. The range is from 40 to 1800 seconds.
Defaults
Not Configured
Command Modes
ROUTER OSPF
Command History
This guide is platform-specific. For command information about other platforms, see the relevant
Dell Networking
OS Command Line Reference Guide
.
Version
Description
9.10(0.0)
Introduced on the S6100-ON.
9.8(1.0)
Introduced on the Z9100-ON.
9.8(0.0P5)
Introduced on the S4048-ON.
9.8(0.0P2)
Introduced on the S3048-ON.
9.7(0.0)
Introduced on the S6000-ON.
Open Shortest Path First (OSPFv2 and OSPFv3)
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