Administrator Guide

To remove an IPsec encryption policy from an interface, enter the no ipv6 ospf encryption spi
number command. To remove null authentication on an interface to allow the interface to inherit the
authentication policy configured for the OSPFv3 area, enter the no ipv6 ospf no ipv6 ospf
encryption null command.
Related
Commands
area encryption – configures an IPsec encryption policy for an OSPFv3 area.
show crypto ipsec policy – displays the configuration of IPsec encryption policies.
show crypto ipsec sa ipv6 – displays the security associations set up for OSPFv3 interfaces in encryption policies.
ipv6 ospf graceful-restart helper-reject
Configure an OSPFv3 interface to not act upon the Grace LSAs that it receives from a restarting OSPFv3 neighbor.
C9000 Series
Syntax
ipv6 ospf graceful-restart helper-reject
To disable the helper-reject role, enter no ipv6 ospf graceful-restart helper-reject.
Defaults The helper-reject role is not configured.
Command Modes INTERFACE
Command History
This guide is platform-specific. 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
9.9(0.0) Introduced on the C9010.
9.2(1.0) Introduced on the Z9500.
9.1.(0.0) Introduced on the S4810 and Z9000.
8.4.2.2 Introduced on E-Series TeraScale.
8.3.19.0 Introduced on the S4820T.
Usage Information
By default, OSPFv3 graceful restart is disabled and functions only in a helper role to help restarting neighbor
routers in their graceful restarts when it receives a Grace LSA.
When configured in a helper-reject role, an OSPFv3 router ignores the Grace LSAs that it receives from a
restarting OSPFv3 neighbor.
The graceful-restart role command is not supported in OSPFv3. When you enable the helper-reject role on an
interface, you reconfigure an OSPFv3 router to function in a “restarting-only” role.
ipv6 ospf hello-interval
Specify the time interval between the hello packets sent on the interface.
C9000 Series
Syntax
ipv6 ospf hello—interval seconds
To return to the default time interval, enter no ipv6 ospf hello—interval.
Parameters
seconds
Enter the time interval in seconds as the time between hello packets. The range is from 1
to 65525 seconds.
Defaults 10 seconds (Ethernet).
1188 Open Shortest Path First (OSPFv2 and OSPFv3)