Slow Speed with NSA 3600

ChrisLakeErie

We have 2 NSA 3600's with HA our ISP just upgraded our DIA to 1GB & we have awful download speed tests under 100MB. I suspect an issue with the Sonicwall wondering if there are any suggested configurations to improve speed other then the usual like optimize for performance.

MitatOnge

@ChrisLakeErie

Please check below steps.

1) wan interface Bandwith settings ( 1 digit could be missing during Gbit to Kbit convertion. )

2) check wan interface cable and sfp modules.

3) check ISP router DUBLEX settings.

4) Sonicwall MTU size test via command line

5) network connection test via Diagnostic test tools.

6) Disable TCP streaming scanning onthe GAV menu.

7) Disable Security services temporarly and speed test.

8) directly connect ISP router to your laptap and assign wan ip and speed test.

9) disable all Flood Protection under the Firewall Settings.

10) disable Bandwith settings for all access rule and Global settings under the Firewall menu.

11) check ip conflict all networks.

12 PowerOff HA standbay device and check network speed.

Ajishlal

@ChrisLakeErie

Make sure your Firewall have latest firmware. If you enabled all UTM features, it might be make impact on your Firewall throughput.

See the below table;

Arjuna_Subramanya

https://community.sonicwall.com/technology-and-support/discussion/4105/slow-speed-with-nsa-3600

Hi @ChrisLakeErie

You can refer to the below Knowledge base article as that might help you to resolve the issue

Troubleshooting Network throughput, Latency, and Bandwidth Issues with a SonicWall UTM | SonicWall

Regards,

Arjuna