how LLT heartbeat setting MAC address ?

Question

I was able to set the&nbsp;MAC addressin LLT , but its getting changed after every server reboot,

&nbsp;

Node A

&nbsp;# lltstat -nvv | head -10

LLT node information:
	&nbsp; &nbsp; Node &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; State &nbsp; &nbsp;Link &nbsp;Status &nbsp;Address
	&nbsp; &nbsp;* &nbsp;0 node a &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;OPEN
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet2 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:F8:3B:B7
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet3 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:F9:73:DC &nbsp; --
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet1 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:F8:F5:AC &nbsp; ---
	&nbsp; &nbsp;&nbsp;1 node b &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;OPEN
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet2 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:FA:2B:77
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet3 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:FB:5E:07 &nbsp;--
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet1 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:F9:E0:17 &nbsp; --

Node B

&nbsp;# lltstat -nvv | head -10

LLT node information:
	&nbsp; &nbsp; Node &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; State &nbsp; &nbsp;Link &nbsp;Status &nbsp;Address
	&nbsp; &nbsp;&nbsp;0 node a &nbsp; &nbsp; &nbsp; &nbsp;OPEN
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet2 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:F8:3B:B7
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet3 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:F9:73:DC &nbsp; --
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet1 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:F8:F5:AC &nbsp; &nbsp;---
	&nbsp; &nbsp; &nbsp;* 1 node b &nbsp; &nbsp; &nbsp; &nbsp; OPEN
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet2 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:FA:2B:77
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet3 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:F9:E0:17 &nbsp; ---
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet1 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:FB:5E:07 &nbsp;----

I got above&nbsp;post VCS instllation, So I followed&nbsp;below steps to change the MAC address for Vnet1 and Vnet3

&nbsp;

gabconfig -U
	svcadm disable svc:/system/gab:default

lltconfig -k disable
	svcadm disable svc:/system/llt:default

svcadm enable svc:/system/llt:default
	lltconfig -k enable

svcadm enable svc:/system/gab:default
	/sbin/gabconfig -c -n2

&nbsp;

It has changed here,&nbsp;

Node A:&nbsp;

&nbsp;# lltstat -nvv | head -10
	LLT node information:
	&nbsp; &nbsp; Node &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; State &nbsp; &nbsp;Link &nbsp;Status &nbsp;Address
	&nbsp; &nbsp;* 0 node a &nbsp; &nbsp; OPEN
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet2 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:F8:3B:B7
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet3 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:F9:73:DC
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet1 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:F8:F5:AC
	&nbsp; &nbsp; &nbsp;1 node b &nbsp; &nbsp;OPEN
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet2 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:FA:2B:77
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet3 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:FB:5E:07
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet1 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:F9:E0:17
	Node B

&nbsp;# lltstat -nvv | head -10

LLT node information:
	&nbsp; &nbsp; Node &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; State &nbsp; &nbsp;Link &nbsp;Status &nbsp;Address
	&nbsp; &nbsp; &nbsp;0 node a &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;OPEN
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet2 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:F8:3B:B7
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet3 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:F9:73:DC
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet1 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:F8:F5:AC
	&nbsp; &nbsp;* 1 node b &nbsp; &nbsp; &nbsp;OPEN
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet2 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:FA:2B:77
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet3 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:FB:5E:07
	&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vnet1 &nbsp; UP &nbsp; &nbsp; &nbsp;00:14:4F:F9:E0:17

&nbsp;

but after server reboot went to orginal state of non-sync mode. where Vnet1's MAC and Vnet3's MAC changed.

Any body know how the setting happens? how it is fetching and from where? how to make it permanent?

&nbsp;

wally_heim · Accepted Answer

Hi skmohanbe,

These look like they might be VMs.&nbsp; I think VMWare has a feature in its VMX files that can be set to generate a new MAC during boot time.&nbsp; If these are actually VMs then you might want to check on that side to see if they are set to static or generated.

&nbsp;

Thank you,

Wally

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how LLT heartbeat setting MAC address ?

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