Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

SG300-10 10-Port Gigabit Managed Switch packet loss and reduced bandwidth, layer 2

Posted on 2016-10-18
12
Medium Priority
?
142 Views
Last Modified: 2016-11-21
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
0
Comment
Question by:TAFJORDMIMER
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 5
  • 3
  • 2
  • +1
12 Comments
 
LVL 39

Expert Comment

by:Aaron Tomosky
ID: 41849345
What is the overall network topology around this switch?
1
 
LVL 47

Expert Comment

by:Craig Beck
ID: 41851013
Can you show the CPU stats from the switch while the problem is occurring?
1
 

Author Comment

by:TAFJORDMIMER
ID: 41851739
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
0
NEW Veeam Agent for Microsoft Windows

Backup and recover physical and cloud-based servers and workstations, as well as endpoint devices that belong to remote users. Avoid downtime and data loss quickly and easily for Windows-based physical or public cloud-based workloads!

 
LVL 47

Assisted Solution

by:Craig Beck
Craig Beck earned 500 total points (awarded by participants)
ID: 41851777
I don't think that switch is up to it if I'm honest.

As a test, if you configure both ports to be 10/half, then ask each customer to max their link, does it do the same?
0
 
LVL 39

Accepted Solution

by:
Aaron Tomosky earned 1000 total points (awarded by participants)
ID: 41852227
Have you tried increasing the burst size?
https://supportforums.cisco.com/discussion/11792586/cisco-sg300-vlan-rate-limit

More information how rate limit can cause dropped packets
http://www.cisco.com/c/en/us/support/docs/quality-of-service-qos/qos-policing/19645-policevsshape.html

Personally I've had much better success with multitenant sharing internet config a in a firewall, with specific experience with sonicwall.
1
 
LVL 31

Assisted Solution

by:masnrock
masnrock earned 500 total points (awarded by participants)
ID: 41868510
I've had similar experience to Aaron in that regard. Either get a better switch, or move the duties to the firewall.

I've used SG300-10 units for Layer 3 duties, but it was only for one organization. Works alright, but nothing impressive. Took some work to get it working right. The bandwidth controls did not really seem to work the way that they should, so I gave up on it. I had initially configured everything right, didn't work. Had to blow out everything, upgrade the firmware, then configure all over again (using backup and restore did not work, as it left me with the same issue).

I've also used one for Layer 2 duties from an ISP connection, been a mixed bag. Definitely took some work to get it working correctly. I had to deal with the ISP (Cox in that instance) because somehow a public IP was getting associated with it, even though the switch had a static local IP, and they had to grant the use of an extra IP.

But I would also ask if you updated the switch to the latest firmware. I have had issues with all sorts of functions within the SG300-10 switch itself that forced me to reset the switch to factory settings, update the firmware, then configure again. That was literally the only way that some things ended up working correctly. (Updating the firmware before the reset to factory is fine as well, but don't expect to be able to have the firmware upgrade along fix issues)
0
 

Author Comment

by:TAFJORDMIMER
ID: 41869676
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.
0
 

Author Comment

by:TAFJORDMIMER
ID: 41869681
We have tryed firmware and boot code upgrade but it have no effect on this problem
0
 
LVL 31

Expert Comment

by:masnrock
ID: 41869768
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.
0
 

Author Comment

by:TAFJORDMIMER
ID: 41869775
No, we havent tried reset, but will try that too in a while to see if it helps
thanks again
0
 

Author Comment

by:TAFJORDMIMER
ID: 41892823
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.
0
 
LVL 31

Expert Comment

by:masnrock
ID: 41895619
Advised that switch is not up to the job
0

Featured Post

Looking for the Wi-Fi vendor that's right for you?

We know how difficult it can be to evaluate Wi-Fi vendors, so we created this helpful Wi-Fi Buyer's Guide to help you find the Wi-Fi vendor that's right for your business! Download the guide and get started on our checklist today!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Hello All, I have been training on Multicast for a while now and whenever I start the topic , I find out that my friends /  Colleagues mention that they do not know how to test Multicast Joins. As most of the multicast would be video traffic and …
#Citrix #Citrix Netscaler #HTTP Compression #Load Balance
Visualize your data even better in Access queries. Given a date and a value, this lesson shows how to compare that value with the previous value, calculate the difference, and display a circle if the value is the same, an up triangle if it increased…
This lesson discusses how to use a Mainform + Subforms in Microsoft Access to find and enter data for payments on orders. The sample data comes from a custom shop that builds and sells movable storage structures that are delivered to your property. …
Suggested Courses

609 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question