Configuring Path Mtu Discovery; Configuring A Static Path Mtu For A Specified Ipv6 Address; Configuring The Aging Time For Dynamic Path Mtus; Configuring Ipv6 Tcp Properties - HP 10500 Series Configuration Manual

Configuring path MTU discovery

This section contains information on configuring path MTU discovery.

Configuring a static path MTU for a specified IPv6 address

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

Configuring IPv6 TCP properties

You can configure the following IPv6 TCP properties:
synwait timer—When a SYN packet is sent, the synwait timer is triggered. If no response packet is
•
received before the synwait timer expires, the IPv6 TCP connection establishment fails.
finwait timer—When the IPv6 TCP connection status is FIN_WAIT_2, the finwait timer is triggered.
•
If no packet is received before the finwait timer expires, the IPv6 TCP connection is terminated. If a
FIN packet is received, the IPv6 TCP connection status becomes TIME_WAIT. If non-FIN packets are
received, the finwait timer is reset upon receipt of the last non-FIN packet and the connection is
terminated after the finwait timer expires.
• Size of the IPv6 TCP sending/receiving buffer.
To configure IPv6 TCP properties:
Command
system-view
ipv6 pathmtu [ vpn-instance
vpn-instance-name ] ipv6-address
[ value ]
Command
system-view
ipv6 pathmtu age age-time
123
Remarks
N/A
Not configured by default.
Remarks
N/A
Optional.
10 minutes by default.
"IPv6 path