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16 Posts

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February 10th, 2009 02:00

Low speed between Celerra and remote Windows host

Good day!
I have some problem with Celerra NS500G. Problem is as low speed between Celerra and remote host ~15 Mb/s (Copy large file).
Celerra and remote host have Gigabit Ethernet Cards.
For comparison I tested speed between 2 remote hosts with Gigabit Cards : ~25 Mb/s.
Why did I got those differences? Help me please. How can I reconfigure Celerra?

11 Legend

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20.4K Posts

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87.4K Points

February 10th, 2009 05:00

is your data traveling the same path whether it's Celerra to server or server to server ? Are there routers/firewalls between Celerra and remote host ?

6 Operator

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1.5K Posts

February 10th, 2009 06:00

Also - do you have any issue between the Celerra and a local host/client? In that case, you can eliminate whether Celerra is causing any issue or not.

I 'll suggest, please check the speed and duplex settings on the Ethernet switch ports where the Celerra data mover ports are connected and ensure that the same speed/duplex settings are applied on both Data mover ports and switch ports. The same goes with remote hosts as well. Majority of network issues are related to speed/duplex mismatch.

Thanks,
Sandip

16 Posts

February 10th, 2009 22:00

Yes, I have 2 routers between the Celerra and a local host, but duplex settings on the Ethernet switch ports are configured.
I think, this problem is in Celerra. May be in Data Mover configuration. Help me, please.

Thanks.

6 Operator

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1.5K Posts

February 11th, 2009 08:00

Is there any host in the local network of Celerra (not through Router)? - Can you please check whether the speed issue is the same while accessing the Celerra from a local host vs from a remote host?

On the data mover - knowing the following information may help us to understand better -
1) how it is connected and configured today?
2) How many ports are connected on each data mover?
3) What is the make and model of the switch to which the Celerra is connected? 4) What is the speed and duplex settings on the Data mover ports?
5) What is the speed and duplex settings on the Switch ports?
6) Are you having any virtual device configured on the Celerra? Like Etherchannel or LACP or Fail safe network?

Thanks,
Sandip

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