Users Guide

Table Of Contents
You can disable auto negotiation and specify the duplex mode and network speed by typing:
racadm config -g cfgNetTuning -o cfgNetTuningNicAutoneg 0
racadm config -g cfgNetTuning -o cfgNetTuningNicFullDuplex <duplex mode>
where:
<duplex mode> is 0 (half duplex) or 1 (full duplex, default)
racadm config -g cfgNetTuning -o cfgNetTuningNicSpeed <speed>
where:
<speed> is 10 or 100 (default).
Setting the Maximum Transmission Unit for IPv4 and IPv6
The Maximum Transmission Unit (MTU) property allows you to set a limit for the largest packet that can be passed through the
interface. To set the MTU, type:
racadm config -g cfgNetTuning -o cfgNetTuningMtu <mtu>
where <mtu> is a value between 5761500 (inclusive; default is 1500).
NOTE: IPv6 requires a minimum MTU of 1280. If IPv6 is enabled, and cfgNetTuningMtu is set to a lower value, the CMC
uses an MTU of 1280.
Configuring CMC Network and Login Security
Settings
The IP address blocking and User blocking features in CMC allow you to prevent security issues due to password guessing
attempts. This feature enables you to block a range of IP addresses and users who can access CMC. By deafult, the IP address
blocking feature is enabled in CMC. You can set the IP range attributes using CMC Web interface or RACADM. To use the
IP address blocking and user blocking features, enable the options using CMC web interface or RACADM. Configure the login
lockout policy settings to enable you to set the number of unsuccessful login attempts for a specific user or for an IP address.
After exceeding this limit, the blocked user can log in only after the penalty time expires.
NOTE: Blocking by IP address is applicable only for IPV4 addresses.
Configuring IP Range Attributes Using CMC Web Interface
NOTE: To perform the following task, you must have Chassis Configuration Administrator privilege.
To configure the IP range attributes using CMC Web interface:
1. In the system tree, go to Chassis Overview and click Network > Network. The Network Configuration page is
displayed.
2. In the IPv4 Settings section, click Advanced Settings.
The Log in Security page is displayed.
Alternatively, to access the Log in Security page, in the system tree, go to Chassis Overview, click Security > Log in.
3. To enable the IP range checking feature, in the IP Range section, select the IP Range Enabled option.
The IP Range Address and IP Range Mask fields are activated.
4. In the IP Range Address and IP Range Mask fields, type the range of IP addresses and IP range masks that you want to
block from accessing CMC.
For more information, see the CMC Online Help.
5. Click Apply to save your settings.
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Configuring CMC