Hi Daniel,

sorry for beeing so unspecific, we have slow transmit speed (40-50 MB/s), file acces to the R720 is through the 6248 slower than by using a direct (crossover) connection (up to 80 MB/s). This is not specific to a special host.

our cuurent config (with our lates step with channel bond (port 14,16,18,20)

console#show running-config
!Current Configuration:
!System Description "Powerconnect 6248, 3.2.0.7, VxWorks 6.5"
!System Software Version 3.2.0.7
!Cut-through mode is configured as disabled
!
configure
sntp unicast client enable
sntp server 10.10.1.1
clock timezone 2 minutes 0
stack
member 1 2
exit
ip address dhcp
username "admin" password efcf59769a9a10342d19f3e469de7502 level 15 encrypted
!
interface ethernet 1/g1
spanning-tree portfast
exit
!
interface ethernet 1/g2
spanning-tree portfast


exit
!
interface ethernet 1/g3
spanning-tree cost 20000
spanning-tree portfast
spanning-tree mst 0 external-cost 20000
exit
!
interface ethernet 1/g4
spanning-tree portfast
exit
!
interface ethernet 1/g5
spanning-tree cost 20000
spanning-tree portfast
spanning-tree mst 0 external-cost 20000
exit
!
interface ethernet 1/g6
channel-group 1 mode auto
exit


!
interface ethernet 1/g7
channel-group 2 mode auto
exit
!
interface ethernet 1/g8
channel-group 1 mode auto
exit
!
interface ethernet 1/g9
spanning-tree portfast
exit
!
interface ethernet 1/g10
spanning-tree cost 200000
spanning-tree portfast
spanning-tree mst 0 external-cost 200000
exit
!
interface ethernet 1/g11
spanning-tree portfast


exit
!
interface ethernet 1/g12
channel-group 2 mode auto
exit
!
interface ethernet 1/g13
spanning-tree cost 2000000
spanning-tree portfast
spanning-tree mst 0 external-cost 2000000
exit
!
interface ethernet 1/g14
channel-group 4 mode auto
spanning-tree portfast
exit
!
interface ethernet 1/g15
spanning-tree portfast
exit
!


interface ethernet 1/g16
channel-group 4 mode auto
spanning-tree portfast
exit
!
interface ethernet 1/g17
spanning-tree portfast
exit
!
interface ethernet 1/g18
spanning-tree portfast
exit
!
interface ethernet 1/g19
spanning-tree portfast
exit
!
interface ethernet 1/g20
spanning-tree portfast
exit
!


interface ethernet 1/g21
channel-group 3 mode auto
exit
!
interface ethernet 1/g22
spanning-tree portfast
exit
!
interface ethernet 1/g23
spanning-tree portfast
exit
!
interface ethernet 1/g24
channel-group 3 mode auto
exit
!
interface ethernet 1/g25
spanning-tree portfast
exit
!
interface ethernet 1/g26


spanning-tree portfast
exit
!
interface ethernet 1/g27
spanning-tree portfast
exit
!
interface ethernet 1/g28
spanning-tree portfast
exit
!
interface ethernet 1/g29
spanning-tree portfast
exit
!
interface ethernet 1/g30
spanning-tree portfast
exit
!
interface ethernet 1/g31
spanning-tree portfast


exit
!
interface ethernet 1/g32
spanning-tree portfast
exit
!
interface ethernet 1/g33
spanning-tree portfast
exit
!
interface ethernet 1/g34
spanning-tree portfast
exit
!
interface ethernet 1/g35
spanning-tree portfast
exit
!
interface ethernet 1/g36
spanning-tree portfast
exit


!
interface ethernet 1/g37
spanning-tree portfast
exit
!
interface ethernet 1/g38
spanning-tree portfast
exit
!
interface ethernet 1/g39
spanning-tree portfast
exit
!
interface ethernet 1/g40
spanning-tree portfast
exit
!
interface ethernet 1/g41
spanning-tree portfast
exit
!


interface ethernet 1/g42
spanning-tree portfast
exit
!
interface ethernet 1/g43
spanning-tree portfast
exit
!
interface ethernet 1/g44
spanning-tree portfast
exit
!
interface ethernet 1/g46
spanning-tree cost 20000
spanning-tree mst 0 external-cost 20000
exit
!
interface ethernet 1/g47
spanning-tree cost 20000
spanning-tree mst 0 external-cost 20000
exit


!
interface ethernet 1/g48
spanning-tree cost 20000
spanning-tree mst 0 external-cost 20000
exit
!
interface ethernet 1/xg1
spanning-tree portfast
exit
!
interface ethernet 1/xg2
spanning-tree portfast
exit
!
interface ethernet 1/xg3
spanning-tree portfast
exit
!
interface ethernet 1/xg4
spanning-tree portfast
exit


exit

Regards

Hi Daniel,

we don't use iSCSI, we have FC-HBA connection from our R720 server to our MD3620f.
 Plus the R720 server is connected to the 6248, so will iiSCSI optimize help here ?

regards

correction, our latest step was 2 to Port bodn (port 14 and port 16)

unfortunatly our 6248 does not have the command "iscsi enable", any further steps ?

regards

Firmware is 3.2.0.7

Yesterday i allready set the MTU to 9216 (on both ports and on the Server side) still no joy and flowcontrol is now active no change in throughput.

Other ideas ?

Hi Daniel,

okay made an Firmware upgrade to 3.3.7.3, enabled iscsi.

The host is directly connect to the same switch as the server.

Sending an 11GB file from local C: to the server connected via crossover cable about 71 MB/s

Sending an 11GB file from local C: to the server connected via switch about 55 MB/s

so we have 15 MB/s difference

The question is why ? any clues ?

OS is SLES 11 SP2,

Bond mode is 802.3ad currently with 2 slaves