3com MSR 20-20 참조 매뉴얼

priority: DR priority, in the range 0 to 255.

instance-id: ID of the instance an interface belongs to, in the range 0 to 255, 
which defaults to 0.

Use the ospfv3 dr-priority command to set the DR priority for an interface of an 
instance.

Use the undo ospfv3 dr-priority command to restore the default value.

The DR priority on an interface defaults to 1

An interface’s DR priority determines its privilege for DR/BDR selection, and the 
interface with the highest priority is considered first.

# Set the DR priority for an interface of instance 1 to 8.

<Sysname> system-view

[Sysname] interface ethernet 1/0

[Sysname-Ethernet1/0] ospfv3 dr-priority 8 instance 1 

ospfv3 mtu-ignore [ instance instance-id ]

undo ospfv3 mtu-ignore [ instance instance-id ]

Interface view

instance-id: Instance ID, in the range 0 to 255, which defaults to 0.

Use the ospfv3 mtu-ignore command to configure an interface to ignore MTU 
when sending DD packets.

Use the undo ospfv3 mtu-ignore command to restore the default 
configuration.

MTU is not ignored by default.

# Configure an interface that belongs to instance 1 to ignore MTU.

<Sysname> system-view

[Sysname] interface serial 2/0

[Sysname-Serial2/0] ospfv3 mtu-ignore instance 1 

ospfv3 timer dead seconds [ instance instance-id ]

undo ospfv3 timer dead [ instance instance-id ]