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8 Posts
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49792
September 17th, 2013 10:00
Powerconnect 6248 performance problem
We recently brought a MD 3620F (connect by FC to an R720) the network speed over 6248 is slow.
If connecting the R720 by a crossover cable to an host directly the network speed good, so our guess there is something probably missconfigured on the 6248.
We even tried Bonded connections from the R720 (4 Nic bond) to the 6248, but the speed is nearly the same.
So we are seeking for a solution
regards
No Events found!
wiboit
8 Posts
0
September 17th, 2013 11:00
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
wiboit
8 Posts
0
September 17th, 2013 11:00
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
wiboit
8 Posts
0
September 17th, 2013 11:00
correction, our latest step was 2 to Port bodn (port 14 and port 16)
wiboit
8 Posts
0
September 18th, 2013 00:00
unfortunatly our 6248 does not have the command "iscsi enable", any further steps ?
regards
wiboit
8 Posts
0
September 18th, 2013 09:00
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 ?
wiboit
8 Posts
0
September 20th, 2013 12:00
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