Configuring A Static Path Mtu For A Specific Ipv6 Address; Configuring The Aging Time For Dynamic Path Mtus; Controlling Sending Icmpv6 Messages - HP 6125XLG Layer 3-Ip Services Configuration Manual

source host fragments the packet according to the MTU. To avoid this situation, configure a proper
interface MTU.
To configure the interface MTU:
Step
1. Enter system view.
2. Enter interface view.
3. Configure the interface MTU.

Configuring a static path MTU for a specific IPv6 address

You can configure a static path MTU for an IPv6 address. Before sending a packet to the IPv6 address,
the device compares the MTU of the output interface with the static path MTU. If the packet exceeds the
smaller one of the two values, the device fragments the packet according to the smaller value. After
sending the fragmented packets, the device dynamically finds the path MTU to a destination host (see
"IPv6 path MTU
To configure a static path MTU for a destination IPv6 address:
Step
1. Enter system view.
2. Configure a static path MTU
for a destination IPv6 address.

Configuring the aging time for dynamic path MTUs

After the device dynamically finds the path MTU to a destination host (see
it sends packets to the destination host based on the path MTU and starts an aging timer. When the
aging timer expires, the device removes the dynamic path MTU and finds the path MTU again.
The aging time is invalid for a static path MTU.
To configure the aging time for dynamic path MTUs:
Step
1. Enter system view.
2. Configure the aging time for
dynamic path MTUs.

Controlling sending ICMPv6 messages

This section describes how to configure ICMPv6 message sending.
discovery").
Command
system-view
ipv6 pathmtu [ vpn-instance
vpn-instance-name ] ipv6-address
value
Command
system-view
ipv6 pathmtu age age-time
Command
system-view
interface interface-type
interface-number
ipv6 mtu mtu-size
151
Remarks
N/A
N/A
By default, no interface MTU is
configured.
Remarks
N/A
No path MTU is configured for any
IPv6 address by default.
"IPv6 path MTU discovery"),
Remarks
N/A
The default setting is 10 minutes.