R3721-F3210-F3171-HP High-End Firewalls Network Management Configuration Guide-6PW101

Table Of Contents
677
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:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Configure a static path MTU
for a specified IPv6 address.
ipv6 pathmtu [ vpn-instance
vpn-instance-name ] ipv6-address
[ value ]
Not configured by default
Configuring the aging time for dynamic path MTUs
After the path MTU from a source host to a destination host is dynamically determined (see "IPv6 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:
Ste
p
Command
Remarks
1. Enter system view.
system-view
N/A
2. Configure the aging time for
dynamic path MTUs.
ipv6 pathmtu age age-time
Optional.
10 minutes by default.
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:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A