chhost

Use the chhost command to change the name or type of a host object. This command does not affect any existing host mappings.

Syntax


>>- chhost -- --+----------------------------------+------------>
                '- -type --+- hpux -----------+-- -'   
                           +- tpgs------------+        
                           +- generic --------+        
                           +- openvms --------+        
                           +- adminlun -------+        
                           '- hide_secondary -'        

>--+---------------------------+-- ----------------------------->
   '- -mask - port_login_mask -'      

>--+-------------------------+-- ------------------------------->
   '- -name -- new_name_arg -'      

>--+-------------------------------------------------+-- ------->
   '- -iscsiusername -- username_for_authentication -'      

>--+------------------------------+----------------------------->
   +- -chapsecret -- chap_secret -+   
   '- -nochapsecret --------------'   

>--+--------------------------+--+- host_name -+---------------><
   +- -site --+- site_name -+-+  '- host_id ---'   
   |          '- site_id ---' |                    
   '- -nosite ----------------'

Parameters

(Optional) Specifies the type of host. The following values are the available host types:

generic indicates the default.
tpgs indicates when target port information changes (extra unit attentions are given to the host).
openvms indicates OpenVMS.
adminlun indicates virtual volumes, which are enabled on the host.
hpux indicates HP-UX firmware.
hide_secondary indicates that all remote copy relationship secondary volumes are unavailable to the host.

For more information about hosts that require the type parameter, see the IBM Spectrum Virtualize™ host attachment documentation.

-name new_name_arg

(Optional) Specifies the new name that you want to assign to the host object.

-mask port_login_mask

(Optional) Specifies which node target ports a host can access and the Fibre Channel (FC) port mask for the host. Worldwide port names (WWPNs) in the host object must access volumes from the node ports that are included in the mask and are in the host object's I/O group. The port mask is 64 binary bits and is made up of a combination of 0's and 1's, where 0 indicates that the corresponding FC I/O port cannot be used and 1 indicates that it can be used. The rightmost bit in the mask corresponds to FC I/O port 1. Valid mask values might range from 0000 (no ports enabled) to 1111111111111111111111111111111111111111111111111111111111111111 (all ports enabled). For example, a mask of 111111101101 enables ports 1, 3, 4, 6, 7, 8, 9, 10, 11, and 12.

-iscsiusername username_for_authentication

(Optional) Specifies the user name for a host object for one-way authentication for Internet Small Computer System Interface (iSCSI) host attachment login. If this parameter is specified, the value is taken as the "username" for one-way authentication to log in to the iSCSI host attachment. If you do not specify the iscsiusername parameter, the IQN of the host object is used as the user name by default. If no iscsiusername parameter is provided and multiple IQNs exist in the same host object, the user name of each IQN is the IQN itself. If the iscsiusername parameter is provided for a multiple IQN host, then log in to all hosts by using the provided IQN. If you use the iscsiusername parameter, you must also specify the chapsecret parameter.

-chapsecret chap_secret

(Optional) Sets the Challenge Handshake Authentication Protocol (CHAP) secret that is used to authenticate the host for iSCSI I/O. This secret is shared between the host and the cluster. The CHAP secret for each host can be listed by using the lsiscsiauth command.

-nochapsecret

(Optional) Clears any previously set CHAP secret for this host. The nochapsecret parameter cannot be specified if chapsecret is specified.

-site site_name | site_id

(Optional) Specifies the numeric site value or site name of the host. The site name must be an alphanumeric value. The site ID must be 1 or 2. The site that is assigned to a host can be changed with any topology: (hyperswap, stretched, or standard).

Note: If the host is mapped to a volume that is in an active relationship, you cannot specify -nosite.

-nosite

(Optional) Resets the site value.

host_name | host_id

(Required) Specifies the host object to modify, either by ID or by current name.

Description

This command can change the name of the specified host to a new name, or it can change the type of host. This command does not affect any of the current host mappings.

The port mask applies to logins from the host initiator port that are associated with the host object. For each login between a host bus adapter (HBA) port and node port, the node examines the port mask that is associated with the host object for which the host HBA is a member and determines whether access is allowed or is denied. If access is denied, the node responds to SCSI commands as if the HBA port is unknown.

Note: When all I/O groups are removed from an iSCSI host, the lsiscsiauth command does not display the authentication entry for that host. Use the addhostiogrp command to map the iSCSI host to at least one I/O group, and then use the addhostport command to add the iSCSI port into it. You must also add authentication for that host by using the chhost command with either the chapsecret or nochapsecret parameter.

An invocation example

chhost -name testhostlode -mask 111111101101 hostone

The following output is displayed:

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An invocation example

chhost -type openvms 0

The following output is displayed:

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An invocation example

chhost -site site1 host3

The following output is displayed:

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