ServerNet Cluster 6780 Operations Guide (G06.24+, H06.03+)

Troubleshooting and Replacement Procedures

ServerNet Cluster 6780 Operations Guide—525606-002

3-23

Checking the External ServerNet X and Y Fabrics

You use the OSM Service Connection to check the external ServerNet X and Y fabrics.

You can also perform internal and external loopback tests on an NNA PIC in an MSEB.

If no alarms are visible on the external fabrics, but you still want to check the

connectivity between the local node and the cluster switch, you can use the Node

Connectivity ServerNet Path Test action. This action tests a path from the local MSEB

to the 6780 switch module on one fabric. If problems are found, OSM generates alarms

based on the result. This action is provided for diagnostic purposes only. It has no

destructive effect.

Table 3-4 describes the scope of the Node Connectivity ServerNet Path Test action.

If an alarm is generated, the problem lies between the local node and the cluster

switch. The problem might be any of these components:

•

The MSEB in slot 51 or 52 of the group 01 enclosure of the local system

•

The PIC in port 6 of the MSEB in slot 51 or 52 of the group 01 enclosure of the

local system

•

The cable from the PIC in port 6 of the MSEB in slot 51 or 52 of the group 01

enclosure to a switch-to-node port of the 6780 switch module

•

The switch-to-node port to which the local system is connected

•

The PIC in slots 6 through 9 of the 6780 switch module that contains the switch-to-

node port to which the local system is connected

•

The 6780 switch module itself

To check ServerNet connectivity on the external fabrics:

1. Log on to the OSM Service Connection.

2. In the tree pane, expand the ServerNet Cluster resource.

Table 3-3. Scope of Node Connectivity ServerNet Path Test

On This

Fabric The test checks from . . . To the . . .

X fabric Port 6 of the MSEB in slot 51 of group 01 Switch-to-Node port of the X-

fabric 6780 switch module.

Y fabric Port 6 of the MSEB in slot 52 of group 01 Switch-to-Node port of the Y-

fabric 6780 switch module.

Note. An error is returned if you try to run this path test when another Node Connectivity

ServerNet Path Test is in progress on the same fabric. The Path Test in Progress attribute

indicates if a path test is currently being conducted on the fabric.