Standby Lan

[Uday_S_Ankolekar]

I have to configure standby lan for each node on a two node cluster. I have four NIC installed on each of them and two are already being used . I want to identify which one of the two that's not being used can be configured as standby lan.
The linkloop command from primary lan fails with all the rest. Is there way to find the correct standby NIC?

[Steven E. Protter]

Shalom prit,

linkloop sometimes fails on perfectly good cards.

lanscan
#lists possible nics

ifconfig lan0

repeat for other nic cards.

Those without ip addresses can be configured as standby lan cards.

SEP

[A. Clay Stephenson]

If I understand your question then it's very easy.

1) Execute cmviewcl -v
2) Execute lanscan

The interfaces not listed by cmviewcl but listed by lanscan are not now being used by MC/SG.

[Uday_S_Ankolekar]

Well, Is it so simple? I have alredy put standby lan information in cmclconfig.ascii file and unused NIC connected to physical network.
I thought linkloop should work for standby lan to function
Thanks for the input.

[Steven E. Protter]

Now you need to test it.

SEP

[Uday_S_Ankolekar]

I have put lan3 as standby lan in cmclconfig.ascii. ifconfig lan3 shows it's up but When I run cmcheckconf -C it complains lan3 can not be configured in cluster because it doesnot have ip address(well that's true!) and it's not stnadby lan for any other lan

[Kent Ostby]

prit --

Check /etc/rc.config.d/netconf to make sure the lan is not listed there.

Your listing in the ascii file should look like this:

NODE_NAME fresno NETWORK_INTERFACE lan0 HEARTBEAT_IP 15.13.168.91
NETWORK_INTERFACE lan3

lan3 would be the STANDBY lan

See this link for more details:
http://docs.hp.com/en/B3936-90100/ch05s05.html#d0e12808

See also http://www1.itrc.hp.com/service/cki/search.do?category=c0&&mode=id&searchCrit=allwords&docType=EngineerNotes&searchString=UMCSGKBRC00009727

[Patrice Le Guyader]

Hi,

Have you try to unplumb this lancard ?

ifconfig lan3 unplumb
ifconfig lan3 plumb

and cmcheckconf -C again.

Hope this helps
Pat

[Kevin Wright]

Linkloop confirms layer 2 communications. This must work correctly prior to adding the standy lans to the cluster correctly.

If linkloop is not working, verify cabling and layer 2 connectivity (vlans) with your network team.