The command “hmc chnet” can be used to configure the configuration of an HMC network interface. For 7063 HMCs, the BMC network interface can also be configured using the option “-b” (BMC):

hmc chnet [-b] [-D] [-j] [-v] <hmc> [<interface> [<IP> [<netmask>]]] [<attributes> ...]
   -b : configure BMC interface
   -j : enable jumbo frames

To configure a static IPv4 address on a network interface, one of the following variants can be used:

$ hmc chnet hmc02 eth3 172.16.199.69 255.255.255.0
$ # or
$ hmc chnet hmc02 eth3 172.16.199.69 netmask=255.255.255.0
$ # or
$ hmc chnet hmc02 eth3 172.16.199.69 ipv4netmask=255.255.255.0
$ # or
$ hmc chnet hmc02 eth3 addr=172.16.199.69 ipv4netmask=255.255.255.0
$ # or
$ hmc chnet hmc02 interface=eth3 addr=172.16.199.69 ipv4netmask=255.255.255.0
$

The change may take a minute or two.

If an HMC is to act as a DHCP server on one of the interfaces, it is easiest to use one of the predefined ranges of IP addresses (“hmc lsnet -D”). Only the IP address for the HMC itself and the argument dpcpserver=on are then specified. No netmask may be specified:

$ hmc chnet hmc02 eth3 172.16.0.1 dhcpserver=on
$ # or
$ hmc chnet hmc02 eth3 addr=172.16.0.1 dhcpserver=on
$ # or
$ hmc chnet hmc02 interface=eth3 addr=172.16.0.1 dhcpserver=on
$

If an interface is to be deconfigured, the special value “none” must be used instead of an IP address:

$ hmc chnet hmc02 eth3 none
$ # or
$ hmc chnet hmc02 eth3 addr=none
$ # or
$ hmc chnet hmc02 interface=eth3 addr=none
$

The following attributes are supported for configuring an HMC network interface:

   interface - the name of the network interface to change
   addr|ipv4addr - the IPv4 address to set or none to clear the static IP address set
   ipv6addr - the IPv6 address to set or none to clear the static IP address set
   netmask|ipv4netmask - the IPv4 netmask to use
   ipv6auto - enable (on) or disable (off) IPv6 autoconfiguration
   ipv6privacy - enable (on) or disable (off) usage of privacy extensions
   dhcp|ipv4dhcp - enable (on) or disable (off) obtaining an IPv4 address via DHCP
   ipv6dhcp - enable (on) or disable (off) obtaining an IPv6 address via DHCP
   lparcomm - DEPRECATED, enable (on) or disable (off) partition communication
   tso - enable (on) or disable (off) TCP segmentation offload (TSO)
   speed - set the speed to one of the following values: auto, 10, 100, 1000
   duplex - set duplex to on of: auto, half or full
   jumboframe - enable (on) or disable (off) jumbo frames

For HMCs of type 7063 with integrated BMC, the BMC network interfaces can be configured via the HMC. The option “-b” (BMC) must be used for this.

For example, to set the IP address of the BMC to hmc02, one of the following commands can be used:

$ hmc chnet -b hmc02 192.168.100.37 255.255.255.0 gateway=192.168.100.1
$ # or
$ hmc chnet -b hmc02 addr=192.168.100.37 netmask=255.255.255.0 gateway=192.168.100.1
$

The following attributes are supported for configuring BMC network interfaces:

   addr|ipv4addr - the IPv4 address to set or none to clear the static IP address set
   netmask|ipv4netmask - the IPv4 netmask to use
   dhcp|ipv4dhcp - enable (on) or disable (off) obtaining an IPv4 address via DHCP
   mode - the mode of the interface (ded, shared or failover)
   vlanid - the VLAN-ID to use
   vlanpriority - the priority to use

In addition to configuring IP addresses, the command also supports setting a host name, setting the local domain, and setting a default gateway.

For example, to set the hostname and local domain, the following command can be used:

$ hmc chnet hmc01 hostname=hmc03 domain=example.com
$

Setting a default gateway on the eth0 interface can be done with the following command:

$ hmc chnet hmc01 eth0 gateway=172.16.57.1
$ # or
$ hmc chnet hmc01 interface=eth0 gateway=172.16.57.1
$