Error Message

The following error is logged in /var/log/messages:

LLT lltconfig ERROR V-14-2-15249 00:1B:21:3C:36:D: get interface mtu failed: No such device

In the above error message, the last character of the MAC address for the network interface appears to be truncated.

This is misleading, as the truncation of the MAC address is not the actual issue.

The "lltstat -vvn" on one node does not display all the configured links (there are 3 for the example).

From node1:

    Node                 State       Link    Status  Address
   * 0 node1           OPEN
                                             eth3    UP      00:1B:21:67:FF:EC
                                             eth2    UP      00:1B:21:5C:39:B4
                                          bond0    UP      00:1B:21:67:FF:E8
     1 node2           OPEN
                                             eth3    UP      00:1B:21:68:05:CC
                                             eth2    UP      00:1B:21:3C:36:DC
                                          bond0    DOWN

 From node2:

     0 node1           OPEN
                                             eth3    UP      00:1B:21:67:FF:EC
                                             eth2    UP      00:1B:21:5C:39:B4
   * 1 node2           OPEN
                                             eth3    UP      00:1B:21:68:05:CC
                                             eth2    UP      00:1B:21:3C:36:DC
 

The configuration of the link is incorrect.

Verify the individual line entries of /etc/llttab for correct entries and required parameters. 

Verify the full correct MAC address for the link is in place.

For example, the /etc/llttab file from node1 is correct and missing no parameters:

set-node node1
set-cluster 101
link eth3 eth-00:1B:21:67:FF:EC - ether - -
link eth2 eth-00:1B:21:5C:39:B4 - ether - -
link-lowpri bond0 eth-00:1B:21:67:FF:E8 - ether - -
 

In this /etc/llttab example for node2, an incorrect line entry exists:

set-node node2
set-cluster 101
link eth3 eth-00:1B:21:3C:36:DC - ether - -
link eth2 eth-00:1B:21:68:05:CC - ether - -
link-lowpri bond0 00:1B:21:3C:36:D8 - ether - -

Careful review of the above example files will result in finding that  "eth-" does not exist on the link-lowpri line entry for node2.

By comparing a known good /etc/llttab file, the missing parameter can be determined.

Edit the /etc/llttab file to fix the missing parameter (in this case, add "eth-" on the link=lowpri line entry).

set-node node2
set-cluster 101
link eth3 eth-00:1B:21:3C:36:DC - ether - -
link eth2 eth-00:1B:21:68:05:CC - ether - -
link-lowpri bond0 eth-00:1B:21:3C:36:D8 - ether - -

Restarting the host will result in all links showing in the "lltstat -vvn" output from all cluster nodes.

In addition, the restart will prove that the change should persist across system reboot, as expected.