H3C S6812 Series Command Reference Manual page 907

ipv6 pathmtu
Use ipv6 pathmtu to set a static Path MTU for an IPv6 address.
Use undo ipv6 pathmtu to delete the Path MTU configuration for an IPv6 address.
Syntax
ipv6 pathmtu ipv6-address value
undo ipv6 pathmtu ipv6-address
Default
No static Path MTU is set.
Views
System view
Predefined user roles
network-admin
Parameters
ipv6-address: Specifies an IPv6 address.
value: Specifies the Path MTU of the specified IPv6 address, in the range of 1280 to 10240 bytes.
Usage guidelines
You can set a static Path MTU for a destination IPv6 address. When a source host sends a packet
through an interface, it compares the interface MTU with the static Path MTU of the specified
destination IPv6 address. If the packet size is larger than the smaller one of the two values, the host
fragments the packet according to the smaller value.
Examples
# Set a static Path MTU for an IPv6 address.
<Sysname> system-view
[Sysname] ipv6 pathmtu fe80::12 1300
Related commands
display ipv6 pathmtu
reset ipv6 pathmtu
ipv6 pathmtu age
Use ipv6 pathmtu age to set the aging time for a dynamic Path MTU.
Use undo ipv6 pathmtu age to restore the default.
Syntax
ipv6 pathmtu age age-time
undo ipv6 pathmtu age
Default
The aging time for dynamic Path MTU is 10 minutes.
Views
System view
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