15-20
z
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.
z
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.
z
Size of the IPv6 TCP sending/receiving buffer.
Follow these steps to configure IPv6 TCP properties:
To do…
Use the command…
Remarks
Enter system view
system-view
—
Set the finwait timer
tcp ipv6 timer fin-timeout
wait-time
Optional
675 seconds by default.
Set the synwait timer
tcp ipv6 timer syn-timeout
wait-time
Optional
75 seconds by default.
Set the size of the IPv6 TCP
sending/receiving buffer
tcp ipv6 window size
Optional
8 KB by default.
Configuring ICMPv6 Packet Sending
Configuring the Maximum ICMPv6 Error Packets Sent in an Interval
If too many ICMPv6 error packets are sent within a short time in a network, network congestion
may occur. To avoid network congestion, you can control the maximum number of ICMPv6 error
packets sent within a specified time by adopting the token bucket algorithm.
You can set the capacity of a token bucket to determine the number of tokens in the bucket. In
addition, you can set the update interval of the token bucket, that is, the interval for restoring
the configured capacity. One token allows one ICMPv6 error packet to be sent. Each time an
ICMPv6 error packet is sent, the number of tokens in a token bucket decreases by one. If the
number of ICMPv6 error packets successively sent exceeds the capacity of the token bucket,
the additional ICMPv6 error packets cannot be sent out until the capacity of the token bucket is
restored.
Follow these steps to configure the capacity and update interval of the token bucket:
To do…
Use the command…
Remarks
Enter system view
system-view
—
