nas networking question

Question

I have a ns702 running 5.5.32.4. I need to reconfigure the existing networking on cge0 and cge1 (on both dm02 and dm03 - dm03 is standby) - cge0 and cge1 are trunked together on the nas side but not configured for etherchannel on our cisco core switch. I have a cisco etherchannel config issue where cge0 is on one core switch and cge1 is on a diffferent core switch and they can not be etherchanneled together. If I leave cge0 on dm02 as is and run a new network connection to cge1 for dm02 on the same core switch what would the impact be if I simply unplug cge1 ether cable and replace with the new ether connection? Should it continue to be available or will I experience a momentary packet loss? Once I get both cge0 and cge1 on the same cisco core switch, I can then complete the etherchannel configuration. I am currently running fine but would like to properly etherchannel the two ports on the cisco side. thanks.

nandas · Accepted Answer

That's correct and in fact a better idea. But no configuration to be done on the Data Mover end (DM3 is a standby one and gets the configuration of server_2 when failed over to) - only to fix the network connection and etherchannel configuration on the switch.

Thanks for reaching out to us

Cheers,
Sandip

jimkunysz · Answer

yes. as I understand it.

I think I might have answererd my own question with an alternate solution.
I can configure the standby dm03 with the correct network cabling and etherchannel configuration and simply failover the prod dm02. then reconfigure the prod dm02.

nandas · Answer

Apparently - you can simply unplug the cable from cge1 and connect the new cable. Since cge0 and cge 1 are already trunked on the Data mover - it does not require any configuration change on the NAS end - only configure the channel on the switch ports.

However, few things to consider -

1) I am assuming that currently only cge0 is being used (as the valid connection in the trunk) for all user connections - however, you may confirm that looking at the network switch port activity and throughput. The port to whcih cge 1 is currently connected should not any traffic.

2) when you configure Etherchannel on the switch - it may cause a momentary loss of connectivity for cge0. You may use portfast feature on these ports to minimise the time. UNIX clients will not be affected as NFS will keep on retrying the connection - but windows client may loose their session and have to reconnect to the shares on NAS.

So, better to do it at off-peak hours.

Hope this helps.
Thanks,
Sandip

Celerra

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