Defining The Mtu And Mss Of The Interface - Patton electronics SmartNode Series Software Configuration Manual

SmartWare Software Configuration Guide
Mode: Interface
Step
1 node(ctx-ip)[router]#interface name
2 node(if-ip)[name]# icmp router-discovery Enables to send router advertisement broadcast
Example: Router advertisement broadcast message
The following example shows how to enable sending router advertisement broadcast messages on IP interface
lan. Use the following commands in IP context configuration mode.
node(ctx-ip)[router]#interface lan
node(if-ip)[lan]#icmp router-discovery
Defining the MTU and MSS of the interface
All interfaces have a default MTU packet size. You can adjust the IP MTU size so that the IP packet that
exceeds the MTU set for an interface is exceeded. The default MTU packet size is set to 1500 for an interface.
In cases where fragmentation is not allowed along the IP connection, forcing a reduction of the MSS (maxi-
mum segment size) is the only viable solution.
Note
All devices on a physical medium must have the same protocol MTU in
order to operate accurately.
Procedure: To set the MTU packet size or the MSS to size on the interface name
Mode: Interface
Step
1 node(ctx-ip)[router]#interface name Selects the interface name for ICMP message processing
2 node(if-ip)[name]#mtu size
3 node(if-ip)[name]#tcp adjust-mss {
(optional) rx|tx } { mtu | mss }
Example: Defining the MTU of the interface
IP interface configuration task list
Command
Command
10 • IP interface configuration
Selects the interface name for ICMP message pro-
cessing configuration
messages
configuration
Sets the IP MTU packet size to size of the interface name.
The MTU packet size value must be in the range from 48
to 1500.
Limits to the MSS (Maximum Segment Size) in TCP SYN
packets to mss or to MTU (Maximum Transmit Unit) - 40
Bytes, if 'mtu' is used. 'rx' applies to packets which
arrive inbound at this IP interface, 'tx' to packets which
leave outbound of this IP interface.
It is recommended to use 'mtu' inbound and outbound.
Purpose
Purpose
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