Service Manual

Version Description
8.3.11.1 Introduced on the Z9000.
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, ooding is the most resource-consuming task. The ooding algorithm, described in RFC-2328,
requires that OSPF ood LSAs (Link State Advertisements) on all interfaces, as governed by LSA’s ooding
scope (see Section 13 of the RFC). When multiple direct links connect two routers, the RFC-2328 ooding
algorithm generates signicant redundant information across all links.
By default, Dell Networking OS implements an enhanced ooding procedure that dynamically and
intelligently determines when to optimize ooding. Whenever possible, the OSPF task attempts to reduce
ooding overhead by selectively ooding on a subset of the interfaces between two routers.
When you enable flood-2328, this command congures Dell Networking OS to ood LSAs on all
interfaces.
graceful-restart grace-period
Species 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.
S6000–ON
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 species the duration of the restart process before
OSPF terminates the process. The range is from 40 to 1800 seconds.
Defaults Not Congured
Command Modes ROUTER OSPF
Command History
This guide is platform-specic. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.7(0.0) Introduced on the S6000-ON.
9.0.2.0 Introduced on the S6000.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
926
Open Shortest Path First (OSPFv2 and OSPFv3)