Configuring Path Mtu Discovery; Configuring A Static Path Mtu For A Specific Ipv6 Address; Configuring The Aging Time For Dynamic Path Mtus - HP 830 Series Configuration Manual

Step
1. Enter system view.
2. Enter VLAN view.
3. Enable ND snooping.
4. Return to system view.
5. Enter Layer 2 Ethernet
interface view or Layer 2
aggregate interface view.
6. Configure the maximum
number of ND snooping
entries the interface can learn.

Configuring path MTU discovery

This section describes how to configure path MTU discovery.

Configuring a static path MTU for a specific IPv6 address

You can configure a static path MTU for a specific 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.
To configure a static path MTU for a specific IPv6 address:
Step
1. Enter system view.
2. Configure a static path MTU
for a specific IPv6 address.

Configuring the aging time for dynamic path MTUs

After the path MTU from a source host to a destination host is dynamically determined (see
path MTU discovery"), the source host sends subsequent packets to the destination host based on this
MTU. After the aging time expires, the dynamic path MTU is removed and the source host re-determines
a dynamic path MTU through the path MTU mechanism.
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.
Command
system-view
vlan vlan-id
ipv6 nd snooping enable
quit
interface interface-type
interface-number
ipv6 nd snooping max-learning-num
number
Command
system-view
ipv6 pathmtu ipv6-address
[ value ]
Command
system-view
ipv6 pathmtu age age-time
110
Remarks
N/A
N/A
Disabled by default.
N/A
N/A
Optional.
By default, the number of ND
snooping entries an interface
can learn is unlimited.
Remarks
N/A
Not configured by default.
"Configuring
Remarks
N/A
Optional.
10 minutes by default.