Setting A Static Path Mtu For An Ipv6 Address; Setting The Aging Time For Dynamic Path Mtus; Controlling Sending Icmpv6 Messages - HPE FlexNetwork MSR Series Comware 7 Layer 3 - Ip Services Configuration Manuals

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

Setting a static path MTU for an IPv6 address

You can set 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 set a static path MTU for a destination IPv6 address:
Step
1. Enter system view.
2. Set a static path MTU for a
destination IPv6 address.

Setting the aging time for dynamic path MTUs

After the device dynamically finds the path MTU to a destination host (see
discovery"), it performs the following operations:
•
Sends packets to the destination host based on the path MTU.
•
Starts the aging timer.
When the aging timer expires, the device removes the dynamic path MTU and finds the path MTU
again.
To set the aging time for dynamic path MTUs:
Step
1. Enter system view.
2. Set the aging time for
dynamic path MTUs.

Controlling sending ICMPv6 messages

This section describes how to configure ICMPv6 message sending.
Command
system-view
interface interface-type
interface-number
ipv6 mtu size
discovery").
Command
system-view
ipv6 pathmtu [ vpn-instance
vpn-instance-name ] ipv6-address
value
Command
system-view
ipv6 pathmtu age age-time
245
Remarks
N/A
N/A
By default, no interface MTU is
set.
Remarks
N/A
By default, no path MTU is set for
any IPv6 address.
"IPv6 path MTU
Remarks
N/A
The default setting is 10 minutes.
The aging time is invalid for a
static path MTU.