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Verifying LLT

Use the lltstat command to verify that links are active for LLT. This command 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.

Using lltstat -n

In the following example, lltstat -n is typed on each node in the cluster:

Node 1

# lltstat -n

Output resembles:

LLT node information:

Node State Links

*0 north OPEN 2

1 south OPEN 2

Node 2

# lltstat -n

Output resembles:

LLT node information:

Node State Links

0 north OPEN 2

*1 south OPEN 2

Note that each node has two links and that each node is in the open state. The asterisk (*) denotes the node on which you typed the command.

Using lltstat -nvv

With LLT configured correctly, the output of lltstat -n shows all the nodes in the cluster and two links for each node. If the output shows otherwise, you can use the verbose option of lltstat.

For example, type lltstat -nvv | more on a node to view additional information about LLT. In the following example, lltstat -nvv | more is typed on node north in a two-node cluster:

# lltstat -nvv | more

Output resembles:

Node				State			Link	 	Status	 	 	Address

*0 north 				OPEN

							lan1 	UP	 	 	08:00:20:93:0E:34

							lan2 	UP	 		08:00:20:93:0E:34

1 south				OPEN

							lan1 	UP	 		08:00:20:8F:D1:F2

							lan2 	DOWN   	 							 
 
2 					CONNWAIT

							lan1	 	DOWN

							lan2	 	DOWN

3 				CONNWAIT

							lan1	 	DOWN

							lan2	 	DOWN
 
 .


 .


 .


 


 31				CONNWAIT


							lan1	 	 DOWN

							/dev/lan:2	 	 DOWN
 

Note that the output lists 32 nodes. It reports on the two nodes in the cluster, north and south, plus non-existent nodes. For each correctly configured node, the information should show a state of open, a status for each link of up, and an address for each link. However, the output in the example shows that for the node south 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. In the following example, lltstat -p is typed on one node in a two-node cluster:

Node 1

# lltstat -p

Output resembles:

LLT port information:

Port Usage Cookie

		0		gab			0x0

			opens:				0 2 3 4 5 6 7 8 9 10 11 ... 28 29 30 31

			connects:				0 1 
 
		7		gab			0x7

			opens:				0 2 3 4 5 6 7 8 9 10 11 ... 28 29 30 31

			connects:				0 1 
 
		31		gab			0x1F

			opens:				0 2 3 4 5 6 7 8 9 10 11 ... 28 29 30 31

			connects:				0 1