restart isis graceful
Use this command to gracefully and automatically restart the IS-IS routing process without requiring manual intervention from the Linux shell. During this process, the Routing Information Base (RIB) remains active to ensure routes are not deleted from the forwarding table.
Command Syntax
restart isis graceful (grace-period <1-65535>|)Parameters
<1-65535>
Grace period in seconds.
Default
Default grace-period is 65535 seconds.
Command Mode
Privileged execution mode
Applicability
Introduced before OcNOS version 1.3. From OcNOS version 7.0.1, executing this command automatically restarts the IS-IS process without requiring manual intervention from the Linux shell.
Example
The following example shows how to gracefully restart the IS-IS routing process with a grace period of 45 seconds. The system prompts for confirmation, stops the process, and automatically restarts it, as shown in the subsequent system logs.
OcNOS# restart isis graceful grace-period 45
% Warning :ISISD process will stop and will restart automatically,
You may loose ISIS configuration, if not saved
Proceed for graceful restart? (y/n):y
2026 May 15 09:11:37.965 : OcNOS : IS-IS : NOTIF : [ISIS_OPR_INTF_CIRCUIT_STATE_4]: ISIS level-1 interface circuit state down INTF:[lo]
2026 May 15 09:11:37.980 : OcNOS : IS-IS : CRITI : [ISIS_OPR_ADJ_STATE_2]: ADJCHG: Tag 1, Level-1, Nbr eth2-0000.0000.0003 , LAN Neighbor Up to LAN Neighbor Down, InterfaceDown.
2026 May 15 09:11:38.043 : OcNOS : CML : CRITI : Module isis disconnected with CML
2026 May 15 09:11:38.050 : OcNOS : CML : CRITI : Module isis disconnected with CML
2026 May 15 09:11:38.056 : OcNOS : CML : CRITI : Module isis disconnected with CML
OcNOS#
OcNOS#2026 May 15 09:11:44.751 : OcNOS : IS-IS : NOTIF : [ISIS_OPR_INTF_CIRCUIT_STATE_4]: ISIS level-1 interface circuit state up INTF:[eth2]
2026 May 15 09:11:44.784 : OcNOS : IS-IS : NOTIF : [ISIS_OPR_INTF_CIRCUIT_STATE_4]: ISIS level-1 interface circuit state up INTF:[lo]