Graceful-Restart - 3Com 8807 Command Reference Manual

OSPF Configuration Commands 441
Related command: acl, ip ip-prefix.
Example
# Filter the received routing information as per the condition defined in ACL 2000.
[SW8800] acl number 2000
[3Com-acl-basic-2000] rule permit source 20.0.0.0 0.255.255.255
[3Com-acl-basic-2000] rule deny source any
[3Com-acl-basic-2000] quit
[SW8800] ospf 1
[3Com-ospf-1]area 1
[3Com-ospf-1-area-0.0.0.1] filter-policy 2000 import

graceful-restart

Syntax
graceful-restart [ value | compatible ]
undo graceful-restart
View
OSPF view
Parameter
value: GR period in the way defined in the RFC3623 standard. It is 120 seconds by
default.
compatible: Performs GR in compatible way.
Description
Use the graceful-restart [ value ] command to configure the OSPF protocol for
the switch to perform GR in the way defined in the RFC3623 standard. The value
argument specifies the period of GR and it is 40 seconds by default. Use the
graceful-restart compatible command to configure the OSPF protocol for the
switch to perform GR in the compatible way.
Use the undo graceful-start command to disable the OSPF GR function.
GR is not supported by default.
The OSPF GR function solves the problem of route oscillation and forwarding
break caused by protocol-software-reset on the distributed system where control
and forward are separate. This function is an enhanced OSPF function. GR can be
implemented in one of the following two ways: the way defined in the RFC3623
standard and the compatible way to interconnect with other vendors.
Example
# Specify the OSPF process 2 to perform GR in the way defined in the RFC3623
standard at the period of 300 seconds.
<SW8800>system-view
[SW8800] ospf 2
[3Com-ospf-2] graceful-restart 300