configure ospfv3 restart-helper

configure ospfv3 [[vlan | tunnel] all | {vlan} vlan-name | {tunnel} tunnel-name | area area-identifier] restart-helper [none | planned | unplanned | both]


This command configures graceful restart helper mode behavior of OSPFv3 interfaces for its neighbors. When an interface is acting as a helper, it will continue to advertise the restarting router as if it was fully adjacent.

Syntax Description

all Variable description, available options, and notes.
vlan-name This command is available on the ExtremeSwitching X440-G2, X450-G2, X460-G2, X465, X590, X620, X670-G2, X690, X695, X870, 5320, 5420, 5520 series switches. name.
area OSPFv3 area.
area-identifier Area identifier.
none Disable helper mode.
planned Support planned restart only.
unplanned Support unplanned restart only.
both Support both planned and unplanned restart.


Restart helper mode is disabled by default.

Usage Guidelines

When the area option is used the command applies to all interfaces in the area at that time. One OSPFv3 interface may not help more than one restarting router at a time. An OSPFv3 interface may not enter helper mode when the router is performing a graceful restart. All the interfaces to a neighbor router must be configured as graceful restart helpers, or the router will not support graceful restart for its neighbor.

Restart Helper mode is displayed in the show ospfv3 interfaces detail output.
# show ospfv3 interfaces detail 
Interface           : v100               Enabled             : ENABLED
Router              : ENABLED            AreaID              :
RouterID            :           Link Type           : point-to-point
Passive             : No                 Cost                : 40/A
Priority            : 1                  Transit Delay       : 1s
Hello Interval      : 10s                Rtr Dead Time       : 40s
Retransmit Interval : 5s                 Wait Timer          : 40s
Interface ID        : 19                 Instance ID         : 0
State               : P2P                Number of state chg : 1
Hello due in        : 7s                 Number of events    : 2
Total Num of Nbrs   : 1                  Nbrs in FULL State  : 1
Hellos Rxed         : 127733             Hellos Txed         : 127739
DB Description Rxed : 4                  DB Description Txed : 3
LSA Request Rxed    : 1                  LSA Request Txed    : 1
LSA Update Rxed     : 2121               LSA Update Txed     : 6156
LSA Ack Rxed        : 5962               LSA Ack Txed        : 2121
In Discards         : 0
DR RtId             :            BDR RtId            :
Restart Helper      : Both
Restart Helper Strict LSA Checking: Enabled     
BFD Protection      : Off 

   RtrId:  IpAddr: fe80::204:96ff:fe51:ea8e  Pri: 1  Type: Auto
   State: FULL  DR:  BDR:  Dead Time: 00:00:31 
   Options: 0x13 (-|R|-|-|E|V6)  Opaque LSA: No   
   Restart Helper Status: Off
   Last Restart Helper Exit Reason: None
   BFD Session State: None


This command was first available in ExtremeXOS 21.1.

Platform Availability

This command is available on ExtremeSwitching X435, X440-G2, X450-G2, X460-G2, X465, X590, X620, X670-G2, X690, X695, X870, 5320, 5420, and 5520 series switches.