Infinity 2 very slow with a Sonicwall

[Steveh24]

Last week our company had Infinity 2 installed with a Static IP and the engineer showed us on his laptop we had 68mb down and 12mb up, which was brilliant, unfortunately the BT Business Hub 3 didn't work with our Sonicwall TZ-170, as it can't forward All Traffic, which was necessary for the VPN.

Fortunately our Sonicwall is a PPoE device, so we removed the BT Hub and connected the BT White Fibre Box to our Sonicwall and went about configuring to our network and soon had it working ok.

The problem is that with the Sonicwall connected we are getting 68mb in to the device but only 2mb out, so something clearly isn't right, so I put the BT Hub back and the download bandwidth is now 68mb and the Internet is very fast, but as already mentioned it won't forward All Traffic so it is usless for the VPN.

Has anyone else had this problem with a Sonicwall and how did you fix it.

We have updated the Sonicwall to the latest Firmware.

Steveh24

[tetrapackage]

We also encountered a lot of slow downs with BT services. I am not sure what went wrong. I guess they have an answer to all of these.

[stchedro]

Hi

This isn't an unusual issue and it to do with how the bandwidth is allocated.

The BT router/modem prioritses upstream traffic up to the limit (10 or 20 Mb/s) and then uses the rest for the downstream. Which is, for once, quite sensible on the part of BT. The issue being the number of tones that can be used on the line before corsstalk hits performance too much.

Most other combos don't do this.

With the Draytek gear you can infulence the profile that is used directly and Drayetk 3510 + BT modem also seems to work OK.

The problem is that the BT modem doesn't really act as a totally dumb modem, it is doing a fair bit of packet processing, and if it isn't picking up the appropriate instructions it is failing to default which is 2mb/s up and unlimited down as this is the basic Infinity option. The problem is that the modem isn't picking up the its IP address and thefore isn't getting the profile from BT central - have you set the net mask correcly?? Have you used used the lowest IP in the range as the router address?? The highest IP in the range should then become the modem address and it should then be able to retrieve the profile.

[Ned70]

This is an old post I know, but just in case folk are still revisiting this thread for a solution:  Try redcing the MTU on the WAN interface to 1412.  This should resolve the performance issues

[hussainsheikh]

Hi Steve,

Just noticed your message here as I was trying to setup SonicWall with BT Hub 3 and for some reason having issues with Port Forwarding as when I setup BT Hub 3 port forwarding to SonicWall WAN IP address than the HTTP traffic goes to the SonicWall Admin login page rather than my server which I setup internally on the NAT Policy. Any advise on how you manage to setup the port forwarding on it?