Service mode

While in service mode, you can use the front panel to view or change a service IPv4 or an IPv6 address. You can also view the version and build level of the SAN Volume Controller software that is installed and active on the node.

Enter service mode only if directed to do so by the IBM® Support Center.

By default, all nodes in a cluster are configured to use the same service IP addresses by using the SAN Volume Controller Console or the svctask chclusterip CLI command. This means that you can place only one node in service mode at a time. However, to make it possible to have more than one node in service mode at a time, you have the following options:

Modify the service mode IP addresses from the front panel after the node is in service mode.
Configure the nodes to use DHCP to allocate service mode IP addresses.

Note: Any changes made to the service addresses from the service mode front panel menus affect only the one node. The changes apply only to this service mode session.

To access a node that is in service mode, point your Web browser to the following Web address, where serviceipaddress is one of the IPv4 or IPv6 addresses that is shown on the front panel display:

https://serviceipaddress

The service mode panel is displayed when you enter service mode. You can navigate to the IPv4 Address, IPv6 Address, or the Version panels, as shown in Figure 1.

Figure 1. Service mode navigation

This figure shows the sequence of the Service Mode options on the front-panel display

You can exit service mode through the Web browser, by using the CLI, or by turning the node off and then on.

IPv4 Address

The IPv4 Address panels show one of the following items for the selected Ethernet port:

The active service mode address if the cluster has an IPv4 address. This can be either a configured or fixed address, or it can be an address obtained through DHCP.
DHCP Failed if the IPv4 service address is configured for DHCP but the node was unable to obtain an IP address.
DHCP Configuring if the IPv4 service address is configured for DHCP while the node attempts to obtain an IP address. This will change to the IPv4 address automatically if a DHCP address is allocated and activated.
A blank line if the cluster does not have an IPv4 address.

If the service IPv4 address was not set correctly or a DHCP address was not allocated, you have the option of correcting the IPv4 address from this panel. Note that the service IP address must be in the same subnet as the cluster IP address.

To set a fixed service IPv4 address from the IPv4 Address: panel, perform the following steps:

Press and release the select button to put the panel in edit mode.
Press the right button or left button to move to the number field that you want to set.
Press the up button if you want to increase the value that is highlighted; press the down button if you want to decrease that value. If you want to quickly increase the highlighted value, hold the up button. If you want to quickly decrease the highlighted value, hold the down button.
Note: If you want to disable the fast increase/decrease function, press and hold the down button, press and release the select button, and then release the down button. The disabling of the fast increase/decrease function lasts until cluster creation is completed or until the feature is again enabled. If the up button or down button is pressed and held while the function is disabled, the value increases or decreases once every two seconds. To again enable the fast increase/decrease function, press and hold the up button, press and release the select button, and then release the up button.
When all the fields are set as required, press and release the select button to activate the new IPv4 address.
The IPv4 Address: panel is displayed. The new service IPv4 address is not displayed until it has become active. If the new address has not been displayed after two minutes, check that the selected address is valid on the subnetwork and that the Ethernet switch is working correctly.

To set the service IPv4 address to use DHCP, perform the following steps:

Navigate to the IPv4 Address: panel.
Press and release the down button. Set IPv4 DHCP? is displayed on the front panel.
Press and release the select button to activate DHCP, or you can press and release the up button to keep the existing address.
If you activate DHCP, DHCP Configuring is displayed while the node attempts to obtain a DHCP address. It changes automatically to show the allocated address if a DHCP address is allocated and activated, or it changes to DHCP Failed if a DHCP address is not allocated.

You can exit service mode through the CLI, or by turning the node off and then on.

IPv6 Address

The IPv6 Address panels show one of the following for the selected Ethernet port:

The active service mode address if the cluster has an IPv6 address. This can be either a configured or fixed address, or it can be an address obtained through DHCP.
DHCP Failed if the IPv6 service address is configured for DHCP but the node was unable to obtain an IP address.
DHCP Configuring if the IPv6 service address is configured for DHCP while the node attempts to obtain an IP address. This changes to the IPv6 address automatically if a DHCP address is allocated and activated.
A blank line if the cluster does not have an IPv6 address.

If the service IPv6 address was not set correctly or a DHCP address was not allocated, you have the option of correcting the IPv6 address from this panel. Note that the service IP address must be in the same subnet as the cluster IP address.

To set a fixed service IPv6 address from the IPv6 Address: panel, perform the following steps:

Press and release the select button to put the panel in edit mode. When the panel is in edit mode, the full address is still shown across four panels as eight (4-digit) hexadecimal values. You edit each digit of the hexadecimal values independently. The current digit is highlighted.
Press the right button or left button to move to the number field that you want to set.
Press the up button if you want to increase the value that is highlighted; press the down button if you want to decrease that value.
When all the fields are set as required, press and release the select button to activate the new IPv6 address.
The IPv6 Address: panel is displayed. The new service IPv6 address is not displayed until it has become active. If the new address has not been displayed after two minutes, check that the selected address is valid on the subnetwork and that the Ethernet switch is working correctly.

To set the service IPv6 address to use DHCP, perform the following steps:

Navigate to the IPv6 Address: panel.
Press and release the down button. Set IPv6 DHCP? is displayed on the front panel.
Press and release the select button to activate DHCP, or you can press and release the up button to keep the existing address.
If you activate DHCP, DHCP Configuring is displayed while the node attempts to obtain a DHCP address. It changes automatically to show the allocated address if a DHCP address is allocated and activated, or it changes to DHCP Failed if a DHCP address is not allocated.
Note: If an IPv6 router is present on the local network, SAN Volume Controller does not differentiate between an autoconfigured address and a DHCP address. Therefore, SAN Volume Controller uses the first address that is detected.

Version

The version option displays the version of the SAN Volume Controller software that is active on the node. The version consists of four fields that are separated by full stops. The fields are the version, release, modification, and fix level; for example, 4.3.2.1.

Build

The Build: panel displays the level of the SAN Volume Controller software that is currently active on this node.