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SG300-10 10-Port Gigabit Managed Switch packet loss and reduced bandwidth, layer 2
Hi,
We use SG300 to deliver internet layer 2 connections for our customers but have discovered a problem.
It occour when there is more than 1 customer connected to the SG300, each on separate lan ports and separate vlans
Each port is configured with the customers speed by shaping bw per port.
Lets say the customer on port 1 has 11Mbit shaped speed, and the customer on port 2 has 12Mbit shaped.
Uplink is gigabit.
When one of the customers, lets say on port 1 uses more then the bandwith shaped on port then i get packet loss to the management ip of the SG300, and the customer on port 2 is suffering from very slow internet and packet loss too.
Anyone have a solution to this?
sg300.docx
We use SG300 to deliver internet layer 2 connections for our customers but have discovered a problem.
It occour when there is more than 1 customer connected to the SG300, each on separate lan ports and separate vlans
Each port is configured with the customers speed by shaping bw per port.
Lets say the customer on port 1 has 11Mbit shaped speed, and the customer on port 2 has 12Mbit shaped.
Uplink is gigabit.
When one of the customers, lets say on port 1 uses more then the bandwith shaped on port then i get packet loss to the management ip of the SG300, and the customer on port 2 is suffering from very slow internet and packet loss too.
Anyone have a solution to this?
sg300.docx
Switches / HubsNetworking Hardware-Other
Last Comment
masnrock
What is the overall network topology around this switch?
Can you show the CPU stats from the switch while the problem is occurring?
ASKER
cpu stats are normal
we notice packet drops only when one of the customer uses more than their bandwith limit.
Lets say the customer on lan port 1 with 11Mbit bw shaping uses 14Mbit then we notice paket drop against the management vlan 4 ip address to the svitsj, and the customer on port 2 is affected also with slow internett and web pages loading slow.
network.png
we notice packet drops only when one of the customer uses more than their bandwith limit.
Lets say the customer on lan port 1 with 11Mbit bw shaping uses 14Mbit then we notice paket drop against the management vlan 4 ip address to the svitsj, and the customer on port 2 is affected also with slow internett and web pages loading slow.
network.png
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ASKER
Thanks for your answer.
We have aproximately 2000 units of SG300 in our isp network for our company cutomers and never had issues except this bandwith problem.
I dont understand why high traffic up to the bandwith limit set on one lan port should affect the other lan port.
I found a setting on the system summary menu and click on lan port where the settings to open port are. Its called protected port enable setting. I dont know if that should be on or off.
We have aproximately 2000 units of SG300 in our isp network for our company cutomers and never had issues except this bandwith problem.
I dont understand why high traffic up to the bandwith limit set on one lan port should affect the other lan port.
I found a setting on the system summary menu and click on lan port where the settings to open port are. Its called protected port enable setting. I dont know if that should be on or off.
ASKER
We have tryed firmware and boot code upgrade but it have no effect on this problem
Did you reset the switch to factory settings, then configure it again from scratch after the upgrades? Like I had mentioned, you have to do it that way to notice any benefit from the upgrades.
ASKER
No, we havent tried reset, but will try that too in a while to see if it helps
thanks again
thanks again
ASKER
I have discovered one or two more things to try.
One is Enable "TCP Congestion Avoidance" under Quality of Service Menu
The other is mentioned before and is a setting direct on port setting and is called Enable "Protected Port"
Hopefully this will solve it but i dont know yet since i have little deep info about what those settings really do on layer 2.
One is Enable "TCP Congestion Avoidance" under Quality of Service Menu
The other is mentioned before and is a setting direct on port setting and is called Enable "Protected Port"
Hopefully this will solve it but i dont know yet since i have little deep info about what those settings really do on layer 2.
Advised that switch is not up to the job