Software IP interface configuration task list
122
IPLink Software Configuration Guide
11 • IP interface configuration
Mode: Interface
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.
IPLink(ctx-ip)[router]#interface lan
IPLink(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 IPLink software
application software will fragment any IP packet that exceeds the MTU set for an interface. 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 (maximum 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
Example:
Defining the MTU of the interface
Step
Command
Purpose
1
node(ctx-ip)[router]#interface
name
Selects the interface
name
for ICMP message pro-
cessing configuration
2
node(if-ip)[
name
]# icmp router-discovery
Enables to send router advertisement broadcast
messages
Step
Command
Purpose
1
node(ctx-ip)[router]#interface
name
Selects the interface
name
for ICMP message processing
configuration
2
node(if-ip)[
name
]#mtu size
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.
3
(optional)
node(if-ip)[name]#tcp adjust-mss {
rx|tx } { mtu |
mss
}
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.