HP VPN Firewall Appliances System Management and Maintenance Command Reference

25
Views
User view
Default command level
1: Monitor level
Examples
# Clear statistics of UDP traffic.
<Sysname> reset udp statistics
tcp mss
Use tcp mss to configure the TCP MSS.
Use undo tcp mss to restore the default.
Syntax
tcp mss value
undo tcp mss
Default
The TCP MSS is 1460 bytes.
Views
Interface view
Default command level
2: System level
Parameters
value: TCP maximum segment size (MSS) in bytes, in the range of 128 to 2048.
Usage guidelines
TCP MSS = path MTU – IP header length – TCP header length
Examples
# Set the TCP MSS to 300 bytes on GigabitEthernet 0/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 0/1
[Sysname-GigabitEthernet0/1] tcp mss 300
tcp path-mtu-discovery
Use tcp path-mtu-discovery to enable TCP path MTU discovery.
Use undo tcp path-mtu-discovery to disable TCP path MTU discovery, and disable all running path MTU
timers. New TCP connections do not perform TCP path MTU discovery, but existing TCP connections can
still use TCP path MTU discovery.
Syntax
tcp path-mtu-discovery [ aging minutes | no-aging ]
undo tcp path-mtu-discovery