Users Guide

• DNS Domain Name — The default DNS domain name is a single blank character. To set a DNS

domain name, type:

racadm config -g cfgLanNetworking -o

cfgDNSDomainName <name>

where <name> is a string of up to 254 alphanumeric characters and hyphens. For example: p45, a-

tz-1, r-id-001.

Configuring Auto Negotiation, Duplex Mode, and Network Speed (IPv4 and

IPv6)

When enabled, the auto negotiation feature determines whether the CMC automatically sets the duplex

mode and network speed by communicating with the nearest router or switch. Auto negotiation is

enabled by default.

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 (MTU) (IPv4 and IPv6)

The 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 576–1500 (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.

NOTE: Blocking by IP address is applicable only for IPV4 addresses.

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.