- play_arrow Configuration Statements and Operational Commands
Hostnames
Configure the Hostname of a Device in a Configuration Group
The hostname of a device running Junos OS device is its identification. A network device must have its identity established to be accessible on the network. That is perhaps the most important reason to have a hostname, but a hostname also has other purposes.
Junos OS uses the configured hostname as part of the command prompt and to prepend log files and other accounting information. The hostname is also used anywhere else where knowing the device identity is important. For these reasons, we recommend that you provide hostnames that are descriptive and memorable.
You can configure the hostname at the [edit system] hierarchy level.
Optionally, instead of configuring the hostname at the [edit system]
hierarchy level, you can use a configuration group, as shown in this procedure. This is a
recommended best practice for configuring the hostname, especially if the device has dual
Routing Engines. This procedure uses groups called re0 and
re1 as an example.
If you configure hostnames that are longer than the CLI screen width, regardless of the terminal screen width setting, the commit operation occurs successfully. Even if the terminal screen width is less than the hostname length, the commit is successful.
To set the hostname by using a configuration group:
Mapping the Hostname of the Switch to IP Addresses
To map a hostname of a switch to one or more IP
addresses, include the inet statement at the [edit
system static-host-mapping hostname] hierarchy
level:
[edit system]
static-host-mapping {
hostname {
inet [ addresses ];
alias [ aliases ];
}
}
hostname is the name
specified by the host-name statement at the [edit
system] hierarchy level.
For each host, you can specify one or more aliases.
See Also
Example: Configuring the Name of the Switch, IP Address, and System ID
The following example shows how to configure the switch name, map the name to an IP address and alias, and configure a system identifier:
[edit]
user@switch# set system host-name switch1
[edit]
user@switch# set system static-host-mapping switch1 inet 192.168.1.77
[edit]
user@switch# set system static-host-mapping switch1 alias sj1
[edit]
user@switch# set system static-host-mapping switch1 sysid 1921.6800.1077
[edit]
user@switch# show
system {
host-name switch-sj1;
static-host-mapping {
switch-sj1 {
inet 192.168.1.77;
alias sj1;
sysid 1921.6800.1077;
}
}
}
