Configuring Pmtu Discovery; Configuring A Static Pmtu For A Specified Ipv6 Address; Configuring The Aging Time For Pmtu; Configuring Ipv6 Tcp Properties - H3C S5500-SI Series Operation Manual

Operation Manual – IPv6 Configuration
H3C S5500-SI Series Ethernet Switches

1.4 Configuring PMTU Discovery

1.4.1 Configuring a Static PMTU for a Specified IPv6 Address

You can configure a static PMTU for a specified IPv6 address. When forwarding
packets, an interface compares the MTU of the interface with the static PMTU of the
specified destination IPv6 address, and uses the smaller one to fragment packets.
Follow these steps to configure a static PMTU for a specified address:
To do...
Enter system view
Configure
PMTU for a specified
IPv6 address

1.4.2 Configuring the Aging Time for PMTU

After the MTU of the path from the source host to the destination host is dynamically
determined, the source host uses this MTU to send subsequent packets to the
destination host. After the aging time expires, the dynamically determined PMTU is
deleted and the source host re-determines the MTU to send packets according to the
PMTU mechanism.
The aging time is invalid for static PMTU.
Follow these steps to configure the aging time for PMTU:
Enter system view
Configure the aging time
for PMTU

1.5 Configuring IPv6 TCP Properties

The IPv6 TCP properties you can configure include:
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 FIN packets are received, the IPv6 TCP
connection status becomes TIME_WAIT. If other packets are received, the finwait
Use the command...
system-view
a static
ipv6 pathmtu ipv6-address
[ value ]
To do...
system-view
ipv6
age-time
Use the command...
pathmtu age
1-19
Chapter 1 IPv6 Configuration
Remarks
—
Required
By default, no static
PMTU is configured.
Remarks
—
Optional
10 minutes by default.