Configuring Mtu For An Interface; Configuring Tcp Mss For An Interface - HP 5920 Series Configuration Manual

Figure 48 Network diagram
Configuration procedure
# Configure IP addresses for VLAN-interface 3 and VLAN-interface 2.
<Switch> system-view
[Switch] interface vlan-interface 3
[Switch-Vlan-interface3] ip address 1.1.1.2 24
[Switch-Vlan-interface3] ip forward-broadcast
[Switch-Vlan-interface3] quit
# Enable VLAN-interface 2 to forward directed broadcasts directed for the directly connected network.
[Switch] interface vlan-interface 2
[Switch-Vlan-interface2] ip address 2.2.2.2 24
[Switch-Vlan-interface2] ip forward-broadcast

Configuring MTU for an interface

When a packet exceeds the MTU of the output interface, the device processes it in one of the following
ways:
If the packet disallows fragmentation, the device discards it.
•
If the packet allows fragmentation, the device fragments it and forwards the fragments.
•
Fragmentation and reassembling consume system resources, so set an appropriate MTU for an interface
based on the network environment to avoid fragmentation.
To configure an MTU for an interface:
Step
1. Enter system view.
2. Enter interface view.
3. Configure an MTU for the
interface.

Configuring TCP MSS for an interface

The maximum segment size (MSS) option informs the receiver of the largest segment that the sender can
accept. Each end announces its MSS during TCP connection establishment. If the size of a TCP segment
is smaller than the MSS of the receiver, TCP sends the TCP segment without fragmentation. If not, it
fragments the segment according to the receiver's MSS.
If you configure a TCP MSS on an interface, the size of each TCP segment received or sent on the
interface cannot exceed the MSS value.
Command
system-view
interface interface-type
interface-number
ip mtu mtu-size
103
Remarks
N/A
N/A
By default, no MTU is configured.