H3C Technologies H3C SecPath F1000-E - Manual (Page 721)

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Step 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:
Step 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:
Step Command Remarks
1. Enter system view. system-view N/A
2. Set the synwait timer.
tcp ipv6 timer syn-timeout
wait-time Optional.
75 seconds by default.
3. Set the finwait timer. tcp ipv6 timer fin-timeout wait-time
Optional.
675 seconds by default.
4. Set the size of the IPv6 TCP
sending/receiving buffer.
tcp ipv6 window size
Optional.
8 KB by default.