H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 129)

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To do… Use the command… Remarks
Enter Ethernet interface
view/aggregate interface view interface interface-type
interface-number
—
Configure the maximum number of
ND snooping entries the interface
can learn
ipv6 nd snooping
max-learning-num number
Optional
By default, the number of ND
snooping entries an interface can
learn is unlimited.
Configuring PMTU discovery
Configuring a static PMTU for a specified IPv6 address
You can configure a static PMTU for a specified destination IPv6 address. When a source host sends a
packet through an interface, it compares the interface MTU with the static PMTU 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.
Follow these steps to configure a static PMTU for a specified IPv6 address:
To do… Use the command… Remarks
Enter system view system-view —
Configure a static PMTU for a
specified IPv6 address ipv6 pathmtu ipv6-address
[ value ] Required
Not configured by default.
Configuring the aging time for dynamic PMTUs
After the path MTU from a source host to a destination host is dynamically determined (see “ IPv6 PMTU
discovery “), the source host sends subsequent packets to the destination host based on this MTU. After
the aging time expires, the dynamic PMTU is removed and the source host re-determines a dynamic path
MTU through the PMTU mechanism.
The aging time is invalid for a static PMTU.
Follow these steps to configure the aging time for dynamic PMTUs:
To do… Use the command… Remarks
Enter system view system-view —
Configure the aging time for
dynamic PMTUs
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.