Configuring The Aging Time For Pmtu; Configuring Ipv6 Tcp Properties; Configuring Ipv6 Fib-Based Forwarding - 3Com MSR 50 Series Configuration Manual

Configuring the Aging
Time for PMTU
Configuring IPv6 TCP
Properties
Configuring IPv6
FIB-Based Forwarding
After the MTU of the path from the source host to the destination host is
dynamically determined (refer to
host sends subsequent packets to the destination host on basis of this MTU. After
the aging time expires, the dynamically determined PMTU is removed and the
source host re-determines an MTU to send packets through the PMTU mechanism.
The aging time is invalid for static PMTU.
Follow these steps to configure the aging time for PMTU:
To do...
Enter system view
Configure aging time for
PMTU
The 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 TCP
connection establishment fails.
finwait timer: When the TCP connection status is FIN_WAIT_2, the finwait
■
timer is triggered. If no packet is received before the finwait timer expires, the
TCP connection is terminated. If a FIN packet is received, the TCP connection
status becomes TIME_WAIT. If other packets are received, the finwait timer is
reset from the last received packet and the connection is terminated after the
finwait timer expires.
Size of the IPv6 TCP sending/receiving buffer.
■
Follow these steps to configure TCP properties:
To do...
Enter system view
Set the finwait timer of TCP
packets
Set the synwait timer of TCP
packets
Set the size of the TCP
sending/receiving buffer
With the caching function of IPv6 FIB enabled, the device searches the FIB cache
when forwarding packets, thus reducing the time in searching IP packets and
improving the forwarding efficiency.
In the load sharing mode of IPv6 FIB, the device can decide how to select an equal
cost multi-path (ECMP) route to forward packets. Currently, two load sharing
modes are supported:

Configuring IPv6 TCP Properties

"IPv6 PMTU Discovery" on page
Use the command...
system-view
ipv6 pathmtu age age-time
Use the command...
system-view
tcp ipv6 timer fin-timeout
wait-time
tcp ipv6 timer syn-timeout
wait-time
tcp ipv6 window size
671
663), the source
Remarks
-
Optional
10 minutes by default.
Remarks
-
Optional
675 seconds by default
Optional
75 seconds by default
Optional
8 KB by default