Users Guide
where <name> is a string of up to 63 alphanumeric characters and hyphens. For example: cmc-1, d-345.
NOTE: If a DNS Domain name is not specied, then the maximum number of characters is 63. If a domain name is specied,
then the number of characters in CMC name plus the number of characters in the DNS Domain Name must be less than or
equal to 63 characters.
• 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.
Conguring Auto Negotiation, Duplex Mode, and Network
Speed for 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 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 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.
Conguring 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. Congure the login lockout policy settings to enable you to set the
number of unsuccessful login attempts for a specic 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.
82 Conguring CMC