Verifying LLT


Verifying LLT
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Use the lltstat command to verify that links are active for LLT. If LLT is configured correctly, this command shows all the nodes in the cluster. The command also returns information about the links for LLT for the node on which you typed the command.

Refer to the lltstat(1M) manual page for more information.

To verify LLT

Log in as superuser on the node galaxy.
Run the lltstat command on the node galaxy to view the status of LLT.
```
lltstat -n
```
The output on galaxy resembles:
```
    LLT node information:
        Node             State           Links
        *0 galaxy          OPEN           2
         1 nebula          OPEN           2
```
Each node has two links and each node is in the OPEN state. The asterisk (*) denotes the node on which you typed the command.

If LLT does not operate, the command does not return any LLT links information: If only one network is connected, the command returns the following LLT statistics information:
```
LLT node information:
    Node                 State    Links
   * 0 galaxy            OPEN        2
     1 nebula            OPEN        2
     2 saturn            OPEN        1
```
Log in as superuser on the node nebula.

Run the lltstat command on the node nebula to view the status of LLT.

lltstat -n

The output on nebula resembles:

    LLT node information:
        Node             State           Links
         0 galaxy          OPEN           2
        *1 nebula          OPEN           2

To view additional information about LLT, run the lltstat -nvv command on each node.

For example, run the following command on the node galaxy in a two-node cluster:

lltstat -nvv active

The output on galaxy resembles the following:

For Solaris SPARC:

    Node          State      Link    Status      Address
    *0 galaxy      OPEN
                             bge1 UP     08:00:20:93:0E:34
                             bge2 UP     08:00:20:93:0E:38
    1 nebula       OPEN
                             bge1 UP     08:00:20:8F:D1:F2
                             bge2 DOWN

For Solaris x64:

    Node          State      Link    Status      Address
    *0 galaxy      OPEN
                             e1000g:1 UP     08:00:20:93:0E:34
                             e1000g:2 UP     08:00:20:93:0E:38
    1 nebula       OPEN
                             e1000g:1 UP     08:00:20:8F:D1:F2
                             e1000g:2 DOWN

The command reports the status on the two active nodes in the cluster, galaxy and nebula.

For each correctly configured node, the information must show the following:

A state of OPEN
A status for each link of UP
An address for each link

However, the output in the example shows different details for the node nebula. The private network connection is possibly broken or the information in the /etc/llttab file may be incorrect.

To obtain information about the ports open for LLT, type lltstat -p on any node.

For example, type lltstat -p on the node galaxy in a two-node cluster:

lltstat -p

The output resembles:

    LLT port information:
      Port  Usage       Cookie
      0     gab          0x0
            opens:       0 2 3 4 5 6 7 8 9 10 11 ... 60 61 62 63
            connects:    0 1 
      7     gab          0x7
            opens:       0 2 3 4 5 6 7 8 9 10 11 ... 60 61 62 63
            connects:    0 1 
      31    gab          0x1F
            opens:       0 2 3 4 5 6 7 8 9 10 11 ... 60 61 62 63
            connects:    0 1