XG reduced bandwith after time

Question

Hello everyone, 
 I am using Sophos XG home version (17.0.6 MR-6) and having a strange behaviour of my WAN. 
 I am having a 250/25 mbit line at my local ISP which is working fine in general. 
 
 In general when running a bandwith test I get 230-240 Mbit down + 25 Mbit up - as expected. 
 But after a couple of hours/days my bandwith is reduced. The results varies from something below 1 Mbit and up to maximum bandwith. 
 I have contacted the support of my ISP and they told me that everything is fine. In addition to that I have also plugged a device direct to the WAN cable and got the full bandwith. 
 
 From my point of view my XG is slowing my bandwith down. 
 
 To resolve the issue I usually need to shutdown the firewall, power off the cable modem and restart both. Then I get my ordinary bandwith back. 
 
 To be honest: I do not have any glue why this is happening!? 
 
 In addition to that my XG also stops routing for some seconds. Meaning that I am not able to query any of my VLAN subnets. 
 So far I found nothing at the log files.

Does anyone has an idea how to start trouble shooting on that dilemma? 
 
 Regards, 
 Mathias

Aditya Patel · Accepted Answer

Hi Mathias, 
 You may try to run this command and check if this would improve the performance. 
 Console >system firewall-acceleration disable

Aditya Patel · Answer

Hello, 
 You may run the command on console to check if there is any error on the interface that may have caused duu to negotiation issue. 
 console > sh net interfaces 
 Also for live error check you may go to 
 console > system diagnostics utilities bandwidth-monitor 
 and enter 'u' twice 
 You should get this table and ideally should be 0 
 Bandwidth Monitor, (Sampling at every 0.500s), press 'h' for help - iface Rx Tx Total ============================================================================== Port4: 0.00 E/s 0.00 E/s 0.00 E/s Port3.502: 0.00 E/s 0.00 E/s 0.00 E/s Port1: 0.00 E/s 0.00 E/s 0.00 E/s Port2.503: 0.00 E/s 0.00 E/s 0.00 E/s GuestAP: 0.00 E/s 0.00 E/s 0.00 E/s Port3: 0.00 E/s 0.00 E/s 0.00 E/s vxlan2: 0.00 E/s 0.00 E/s 0.00 E/s reds1: 0.00 E/s 0.00 E/s 0.00 E/s wlnet1: 0.00 E/s 0.00 E/s 0.00 E/s vxlan2.101: 0.00 E/s 0.00 E/s 0.00 E/s lo: 0.00 E/s 0.00 E/s 0.00 E/s ipsec0: 0.00 E/s 0.00 E/s 0.00 E/s tun0: 0.00 E/s 0.00 E/s 0.00 E/s Port2: 0.00 E/s 0.00 E/s 0.00 E/s imq0: 0.00 E/s 0.00 E/s 0.00 E/s ------------------------------------------------------------------------------ total: 0.00 E/s 0.00 E/s 0.00 E/s