Abnormal Network Transfer Speeds

[BoomAM]

Hmm.
Constant transfer rate of 3.5% of 2gig in on the BKP server on the Backup server.
Only thing i can think of is that either the ESXi host that has the VM or the switch inbetween is doing something funny.
But i cant see that being the case as the backup goes to another physical server at full speed fine!

 

[ashrobbo]

If that were the case you'd seed a flat topped graph, this one drops back to zero.

But the graph the op posted isnt flat topped?

he hasnt posted a graph of a single nic config? anyway he answered the question above saying the transfer speed is consistent with 1 card and doesnt drop out but its still way slower than expected.

Ive found the Hp drivers to be more reliable than the broadcom specific ones on dl380's

 

[ashrobbo]

So youve fixed no dropouts, but still experiencing speed issue?

Does your switch show both ports at 1gbps?
what teaming config are you using?

 

[bigredshark]

Is the traffic TCP or UDP?

 

[BoomAM]

So youve fixed no dropouts, but still experiencing speed issue?

Appears that way yes.

Does your switch show both ports at 1gbps?

Not sure, i'd have to telnet on, work out the commands, and have a look.

what teaming config are you using?

Intellident Load Balancing and Fault Tolerance according to the HP Utility.

 

[BoomAM]

Is the traffic TCP or UDP?

Only just noticed this post....tbh, not a clue, whatever Windows Server Backup uses.

 

[Skidilliplop]

Only just noticed this post....tbh, not a clue, whatever Windows Server Backup uses.

Probably TCP, netstat will confirm this, if not wireshark will.

 

[BoomAM]

Just tried putting in a different, un-managed, gigabit switch, with HP teaming, starts off high, then the transfer rate plummets!
I guess thats almost a dead cert its the server.

Just got to work out whats causing it.

 

[droyden]

Are the NIC's onboard? If not can you try to swap?

 

[BoomAM]

Are the NIC's onboard? If not can you try to swap?

Read above
Three nics, two on HP NC card, 1 onboard, all gig.
Tried teaming combinations with all three.

Tried a seperate switch, no difference.
Updated every driver, firmware & ROM i could find, still no difference.
Removed all other PCI-E cards from the system, no difference.

 

[Skidilliplop]

what spec are the two machines? particularly storage wise.

 

[BoomAM]

what spec are the two machines? particularly storage wise.

Two?
There is only a problem with one.

The source server can be one of two sources, either a file share where ive pulled test ISOs from on a physical, or a virtual Exch server as the other.
The backup server itself has a mirrored OS Drive, 4 disk RAID5 set as its data, and an iSCSI attached 12Tb Drobo.

 

[BoomAM]

Just stuck in a Intel 1Gig PCI-X card and tested with that.
Speed is FAR better.
On a 7Gb transfer, sticks at about 70-90Mb/s for the first 4-5 Gig, then drops to 50Mb/s for the remainder. Few drop outs here and there, but significantly quicker!

 

[BoomAM]

Bump!

Any suggestions?