Administering Cluster Interconnects and Public Networks

This chapter provides the software procedures for administering the Sun Cluster interconnects and public networks.

Administering the cluster interconnects and public networks consists of both hardware and software procedures. Typically, you configure the cluster interconnects and public networks, including Internet Protocol (IP) Network Multipathing groups, when you initially install and configure the cluster. If you later need to alter a cluster interconnect network configuration, you can use the software procedures in this chapter. For information about configuring IP Network Multipathing groups in a cluster, see the section Administering the Public Network.

This is a list of the procedures in this chapter.

• How to Check the Status of the Cluster Interconnect

• How to Add Cluster Transport Cables, Transport Adapters, or Transport Junctions

• How to Remove Cluster Transport Cables, Transport Adapters, and Transport Junctions

• How to Enable a Cluster Transport Cable

• How to Disable a Cluster Transport Cable

• How to Administer IP Network Multipathing Groups in a Cluster

For a high-level description of the related procedures in this chapter, see Table 6-1 and Table 6-3.

Refer to the Sun Cluster Concepts Guide for Solaris OS document for background and overview information on the cluster interconnects and public networks.

Administering the Cluster Interconnects

This section provides the procedures for reconfiguring cluster interconnects, such as cluster transport adapters and cluster transport cables. These procedures require that you install Sun Cluster software.

Most of the time, you can use the scsetup(1M) utility to administer the cluster transport for the cluster interconnects. See the scsetup man page for more information.

For cluster software installation procedures, see the Sun Cluster Software Installation Guide for Solaris OS. For procedures about servicing cluster hardware components, see the Sun Cluster Hardware Administration Manual for Solaris OS .

Note - You can usually choose to use the default port name, where appropriate, during cluster interconnect procedures. The default port name is the same as the internal node ID number of the node that hosts the adapter end of the cable. However, you cannot use the default port name for certain adapter types, such as SCI.

Table 6-1 Task List: Administering the Cluster Interconnect

Dynamic Reconfiguration With Cluster Interconnects

There are a few issues you must consider when completing dynamic reconfiguration (DR) operations on cluster interconnects.

• All of the requirements, procedures, and restrictions that are documented for the Solaris DR feature also apply to Sun Cluster DR support (except for the operating environment quiescence operation). Therefore, review the documentation for the Solaris DR feature before using the DR feature with Sun Cluster software. You should review in particular the issues that affect non-network IO devices during a DR detach operation.

• Sun Cluster rejects DR remove-board operations performed on active private interconnect interfaces.

• If the DR remove-board operation pertains to an active private interconnect interface, Sun Cluster rejects the operation and identifies the interface that would be affected by the operation.

Caution - Sun Cluster requires that each cluster node has at least one functioning path to every other cluster node. Do not disable a private interconnect interface that supports the last path to any cluster node.

Complete the following procedures in the order indicated when performing DR operations on public network interfaces.

Table 6-2 Task Map: Dynamic Reconfiguration with Public Network Interfaces

How to Check the Status of the Cluster Interconnect

You can also accomplish this procedure by using the SunPlex Manager GUI. See the SunPlex Manager online help for more information.

You do not need to be logged in as superuser to perform this procedure.

1. Check the status of the cluster interconnect.

   # scstat -W

   
   

2. Refer to the following for common status messages.

   Status Message	Description and Possible Action
   Path online	The path is currently functioning correctly. No action is necessary.
   Path waiting	The path is currently being initialized. No action is necessary.
   Path faulted	The path is not functioning. This can be a transient state when paths are going between the waiting and online state. If the message persists when scstat -W is rerun, take corrective action.

Example--Checking the Status of the Cluster Interconnect

The following example shows the status of a functioning cluster interconnect.

# scstat -W
-- Cluster Transport Paths --
                    Endpoint             Endpoint             Status
                    --------             --------             ------
  Transport path:   phys-schost-1:qfe1   phys-schost-2:qfe1   Path online
  Transport path:   phys-schost-1:qfe0   phys-schost-2:qfe0   Path online
  Transport path:   phys-schost-1:qfe1   phys-schost-3:qfe1   Path online
  Transport path:   phys-schost-1:qfe0   phys-schost-3:qfe0   Path online
  Transport path:   phys-schost-2:qfe1   phys-schost-3:qfe1   Path online
  Transport path:   phys-schost-2:qfe0   phys-schost-3:qfe0   Path online

How to Add Cluster Transport Cables, Transport Adapters, or Transport Junctions

You can also accomplish this procedure by using the SunPlex Manager GUI. See the SunPlex Manager online help for more information.

1. Ensure that the physical cluster transport cables are installed.

   For the procedure on installing a cluster transport cable, see the Sun Cluster Hardware Administration Manual for Solaris OS .

2. Become superuser on any node in the cluster.

3. Enter the scsetup utility.

   # scsetup

   
   

   The Main Menu is displayed.

4. Access the Cluster Interconnect Menu by typing 3 (Cluster interconnect).

   ---

   Note - If your configuration uses SCI adapters, do not accept the default when you are prompted for the adapter connections (the port name) during the "Add" portion of this procedure. Instead, provide the port name (0, 1, 2, or 3) found on the Dolphin switch, to which the node is physically cabled.

   ---

5. Add the transport cable by typing 1 (Add a transport cable).

   Follow the instructions and enter the requested information.

6. Add the transport adapter by typing 2 (Add a transport adapter to a node).

   Follow the instructions and enter the requested information.

7. Add the transport junction by typing 3 (Add a transport junction).

   Follow the instructions and enter the requested information.

8. Verify that the cluster transport cable, transport adapter, or transport junction is added.

   # scconf -p | grep cable # scconf -p | grep adapter # scconf -p | grep junction