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Page 274 of 466 Connecting an MRV LX8020S-102AC-R Terminal Server
NN43041-310 Standard 01.11 October 2008
a. Connect to the management port or virtual management port
b. At the InReach: 0>> prompt, type shell. The shell window opens.
InReach: 0 >>shell
BusyBox v1.1.3 (2006.10.20-12:27+0000) Built-in shell
(ash)
c. It will then go to the LX prompt as shown below. Type the below
command to start editing.
LX:/config# vi sysctl.conf.
d. Once the VI editor starts, start by pressing the letter “i” to enter the
insert mode. Using the arrow keys, the cursor can be moved to the
place where the settings of the keep alive timer are there so that they
can be changed if required.
e. Hit the “Esc” to exit insert mode followed by a “ZZ” to QUIT and
WRITE only if changes where made, to exit and not saving changes
type: q! After the “Esc”.
i. The following command fixes a problem with zmodem. It limits
the size of the TCP window:
sysctl -w net.ipv4.tcp_rmem="128 256 512"
Note: The above command is typed in the sysctl.conf.
Similarly many other parameters of the keep alive timer can be
modified.
Use the command: sysctl -a
Examples are (the 3 numbers are the minimum, average and
maximum values):
net.ipv4.tcp_keepalive_intvl = 75 ; in seconds
net.ipv4.tcp_keepalive_probes = 9
net.ipv4.tcp_keepalive_time = 180; in Seconds
Here the TCP keep alive timer has been changed to 3 min.
f. After saving the changes using vi editor, exit to Inreach prompt and
reboot the LX server.
InReach:0 >>reboot.
3 Enable the RLOGIN daemon on the LX.