Unsolved
This post is more than 5 years old
2 Posts
0
33302
September 13th, 2012 10:00
Slow performance between two PowerConnect 5448 switches
I have two Dell PowerConnect 5448 switches connected together over g1 interface on each switch. I have two servers, A and B, connected to switch A and copying a file between them delivers about 60MB/s performance. The g1 interface is used on both switch A and switch B to connect them. Server C located on switch B. When server C copies files from server A the performance is only 15MB/s.
All relevant ports show they are gigabit speed. Looking at the interfaces I don't see anything that appears to be wrong, at least to my eye. I've upgraded the 5448 firmware to latest version but this made no difference.
Using the web GUI, I've looked at the g1 interfaces and the utilization percent is very low.
These two switches are part of a larger network but I don't see the rest of the network affecting this specific issue.
How do I troubleshoot this further?
Athlonx2
2 Posts
0
September 13th, 2012 13:00
1) Yes, switch A can communicate with any other device on Switch B. I, just now,
tested with another server connected on Switch B and obtained 39MB/s
throughput.
2) Server A is W2K3 Storage with SP2, NIC is Broadcom BCM5708C, and version is 2.6.14.0.
Server B is W2K3 Std with SP2, NIC is Broadcom BCM5708C, and version is 3.0.5.0.
Server C is W2K3 Std with SP2, NIC is Intel Pro/1000 MT Dual Port Server, and version
is 8.10.3.0.
3) I don’t know the cable length and it is too far to run another cable easily. I
did do the PowerConnect cable test and it passed.
Anything with xxxxxx is redacted.
4) Switch A config and interface g1.
voice vlan oui-table add 0001e3
Siemens_AG_phone________
voice vlan oui-table add 00036b
Cisco_phone_____________
voice vlan oui-table add 00096e
Avaya___________________
voice vlan oui-table add 000fe2
H3C_Aolynk______________
voice vlan oui-table add 0060b9
Philips_and_NEC_AG_phone
voice vlan oui-table add 00d01e
Pingtel_phone___________
voice vlan oui-table add 00e075
Polycom/Veritel_phone___
voice vlan oui-table add 00e0bb
3Com_phone______________
iscsi target port 860 address 0.0.0.0
iscsi target port 3260 address 0.0.0.0
interface vlan 1
ip address 10.0.0.244 255.255.255.0
exit
ip default-gateway 10.0.0.254
no qos
username admin password xxxxxxxxx level 15
encrypted
[0mMore: , Quit: q, One line:
Default settings:
Service tag: xxxxxxxx
SW version 2.0.0.46 (date 14-Apr-2011 time 13:10:53)
Gigabit Ethernet Ports
=============================
no shutdown
speed 1000
duplex full
negotiation
flow-control off
mdix auto
no back-pressure
interface vlan 1
interface port-channel 1 - 8
spanning-tree
spanning-tree mode STP
qos basic
[0mMore: , Quit: q, One line:
qos trust cos
console# show interfaces status ethernet g1
Flow Link Back Mdix
Port Type Duplex Speed Neg ctrl State Pressure Mode
-------- ------------ ------ ----- -------- ---- ----------- -------- -------
g1 1G-Copper Full 1000 Enabled Off Up Disabled On
console#
5) Switch B config and interface g1.
voice vlan oui-table add 0001e3
Siemens_AG_phone________
voice vlan oui-table add 00036b
Cisco_phone_____________
voice vlan oui-table add 00096e
Avaya___________________
voice vlan oui-table add 000fe2 H3C_Aolynk______________
voice vlan oui-table add 0060b9
Philips_and_NEC_AG_phone
voice vlan oui-table add 00d01e
Pingtel_phone___________
voice vlan oui-table add 00e075
Polycom/Veritel_phone___
voice vlan oui-table add 00e0bb
3Com_phone______________
iscsi target port 860 address 0.0.0.0
iscsi target port 3260 address 0.0.0.0
interface vlan 1
ip address 10.0.0.248 255.255.255.0
exit
ip default-gateway 10.0.0.254
no qos
username admin password xxxxxxxxxxxxx level
15 encrypted
snmp-server community Dell_Network_Manager
rw view DefaultSuper
[0mMore: , Quit: q, One line:
Default settings:
Service tag: xxxxxxxxxx
SW version 2.0.0.46 (date 14-Apr-2011 time 13:10:53)
Gigabit Ethernet Ports
=============================
no shutdown
speed 1000
duplex full
negotiation
flow-control off
mdix auto
no back-pressure
interface vlan 1
interface port-channel 1 - 8
spanning-tree
spanning-tree mode STP
[0mMore: , Quit: q, One line:
qos basic
qos trust cos
console# show interfaces status ethernet g1
Flow Link Back Mdix
Port Type Duplex Speed Neg ctrl State Pressure Mode
-------- ------------ ------ ----- -------- ---- ----------- -------- -------
g1 1G-Copper Full 1000 Enabled Off Up Disabled Off
console#
I originally started troubleshooting this as a user (running win7) reported receiving
only 15MB/s throughput when copying a file from server A. I got on the same
switch and got 60MB/s throughput from Server A to Server B. Then I moved one
switch away to Switch B Server C and received the same speed (15MB/s). Now
Server D on Switch B seems pretty good at 39MB/s. So perhaps my issue isn’t
between these switches? I’d appreciate your thoughts.
I have a total of 7 switches (5 Dell and 2 Netgear) and they aren’t configured
very well. I’m trying to get in and figure out what the where slowness is located.
I thought I had isolated at least this specific slowness between these
switches.
Thank you,
Matthew