HP Fabric Clustering System HP-UX Administrator's Guide, March 2008

Table B-41 Command Syntax Description (continued)
DescriptionCommand
Enter the Maximum Transmission Unit (MTU) to apply. The MTU value may be 256, 512,
1024, 2048, or 4096. MTU is specified in octets (8-bit bytes). Refer to Usage Guidelines for
more information.
mtu
Sets the MTU to the default.
no
Command Modes: Global configuration (config) mode.
Privilege Level: Ethernet and InfiniBand read-write user.
Usage Guidelines: The maximum transmission unit is described in terms of payload size. TCP
uses the MTU to determine the maximum payload allowed for every transmission. Too great a
value can overwhelm routers and result in data retransmission. Too small a value results in
degraded performance because there are more headers and acknowledgements required to
transmit the same amount of data.
Examples:
HP-IB# configure
HP-IB(config)# ip ip-over-ib-mtu 4096
HP-IB(config)#
Defaults: The default ip-over-ib-mtu unit is 2048.
NOTE: Infiniband hosts cannot handle change in MTU.
Related Commands: “show ip” (page 168)
ip name-server-one
Synopsis: The ip name-server-one command specifies the IP address of the primary DNS
server.
Syntax: ip name-server-one ip
no ip name-server-one
The syntax is described in the table below:
Table B-42 Command Syntax Description
DescriptionCommand
Enter the main ip command.ip
Specifies the IP address of the primary DNS server.
name-server-one
Enter the IP address of the primary DNS server.ip
Use this keyword to return the primary DNS server to the default address.
no
Command Modes: Global configuration (config) mode.
Privilege Level: Ethernet and InfiniBand read-write user.
Usage Guidelines: Configure this parameter in order to support name resolution when
specifying other devices and hosts by name.
Examples:
HP-IB# configure
HP-IB(config)# ip name-server-one 10.3.103.22
Defaults: The default is an empty string.
Related Commands: “ip name-server-two” (page 181)
“show host” (page 141)
180 Switch Command Line Interface