lltstat is unable to resolve the mac address of the llt interface due to a network / switch configuration problem.

systemA:~# lltstat -nvv|more
LLT node information:
   Node                 State    Link  Status  Address
  * 0 systemA            OPEN
                                 ce4   UP      00:14:4F:44:88:51
                                 ce10   UP      00:14:4F:67:6E:BB
    1 systemB            OPEN
                                 ce4   UP      00:14:4F:67:5B:ED
                                 ce10   DOWN    00:14:4F:44:88:1F

systemB:~# lltstat -nvv|more
LLT node information:
   Node                 State    Link  Status  Address
    0 systemA            OPEN
                                 ce4   UP      00:14:4F:44:88:51
                                 ce10   DOWN                          >>>>>> the MAC address is not showing here
  * 1 systemB            OPEN
                                 ce4   UP      00:14:4F:67:5B:ED
                                 ce10   UP      00:14:4F:44:88:1F

Specify the MAC address of the LLT interface directly in the /etc/llttab file.

Here are the procedures to do that without affecting the running applications. Let us assume this is a two node cluster (systemA and systemB) running a failover type of application.

1. Find out what is the MAC address of each of the LLT interface, by running the following commands on each node:

# /opt/VRTSllt/getmac /dev/ce:4      >>>> this will give you the mac address of interface ce4
# /opt/VRTSllt/getmac /dev/ce:10      >>>> this will give you the mac address of interface ce10
 

2. Once the MAC address is known, then modify the /etc/llttab on each node and add the last 6 lines as follows:

  * on node systemB (Node 1)

set-node systemB
set-cluster 88
link ce4 /dev/ce:4 - ether - -
link ce10 /dev/ce:10 - ether - -
set-bcasthb 0
set-arp 0
set-addr 0 ce4 00:14:4F:44:88:51
set-addr 0 ce10 00:14:4F:67:6E:BB

!!Warning: Only set address for peer node, and should not set local node address manually.  local node address will be automatically discovered when starting LLT. (Need to add set-verbose 1 to see the message for finding local mac address)

* on node systemA (Node 0)

set-node systemA
set-cluster 88
link ce4 /dev/ce:4 - ether - -
link ce10 /dev/ce:10 - ether - -
set-bcasthb 0
set-arp 0 
set-addr 1 ce4 00:14:4F:67:5B:ED
set-addr 1 ce10 00:14:4F:44:88:1F

3. Freeze all the service groups in the cluster:

# haconf -makerw
# hagrp -freeze -persistent
# haconf -dump -makero  
 

4. Stop 'had' and unload gab and llt modules:

In any node, run the following:

# hastop -all -force

Once 'had' has stopped in both nodes run the following in both nodes:

# gabconfig -U               >>>>> capital case 'U'

Once gab has been unconfigured in both nodes run the following in both nodes:

# lltconfig -U               >>>>> capital case 'U'

5. Restart llt, gab and 'had':

Once llt has been unconfigured in both nodes then, in both nodes run the following to start llt again:

# lltconfig -c

and in both nodes in the cluster, run the following to start gab again:

# gabconfig -c -n2

and finally, restart the 'had' again...
Run the following on each of the nodes in the cluster:

# hastart

6. Finally unfreeze the service groups above:

# haconf -makerw
# hagrp -unfreeze -persistent
# haconf -dump -makero