How to set the MTU size on RSA Netwitness appliances 10.x

[#1]

Article Number

000034177

Applies To

RSA Product Set: Netwitness Suite
RSA Product/Service Type: Netwitness UI Server
RSA Version/Condition: 10.x
Platform: CentOS
O/S Version: 6
Product Name: Netwitness for Logs and Packets
 

Issue

Some customers wants to change the MTU of their Netwitness appliances for the sake of increasing the network performance.
 

Resolution

There are two ways of changing the MTU on the appliances 

1- To change it on fly (the change will take effect immediately but will revert back with network/appliance restart
Please use:

ifconfig eth0 mtu 1500 up

 

  Change the eth0 depending on the interface name and 1500 depending on the MTU needed value

2- To change it permanently,

Please use
 

vi /etc/sysconfig/network-scripts/ifcfg-eth0

 Change the eth0 depending on the interface name

Add the below the line at the end of the file 
 

MTU="1500"

Change 1500 with the needed value


Restart network service on the appliance.
 

service network restart

 

Notes

This optimal value for the MTU should be provided by the customer's network team.