Billion 8800NL in bridging mode: slow connection through OpenWRT router

[Christmas themed thank]

I've got a TalkTalk Fibre connection. I'm using the Billion 8800NL as a modem in bridging mode connected to a TP-Link Archer C7, running OpenWRT.

I have previously used the Billion 8800NL as the router as well as the modem and the Internet was great. No hangups, always responsive, great.

With the 8800NL in bridging mode, connected to the OpenWRT router, the Internet is noticeably slower and less responsive. Pages sometimes take ages to load, WhatsApp messages take ages to send, etc.

Put the 8800NL as a router again and everything is fine.

What is going on?

 

[Caged]

What have you set the MTU on the TP Link's WAN connection to?

 

[Christmas themed thank]

What have you set the MTU on the TP Link's WAN connection to?

1500.

 

[Caged]

Try 1492

 

[Christmas themed thank]

Doesn't seem to be helping much.

 

[Caged]

Drop it to 1400 just to rule the MTU in/out, it does sound related to that.

 

[Christmas themed thank]

Sorry for the bump but I'm having this problem again: slow, unresponsive internet. MTU at 1492 on OpenWRT router, DHCP bridge to my Billion 8800NL (TalkTalk Fibre).

 

[bremen1874]

Did you try dropping the MTU right down as suggested?

Did the problem occur with stock firmware on the Archer C7?

Do you actually need a router running OpenWRT? I'd be tempted to leave the 8800NL to work as the router and configure the Archer C7 as a WAP. It depends on why you wanted OpenWRT in the first place.

 

[Christmas themed thank]

OpenWRT because of its SQM QoS.

I have modified the MTU as suggested and it helps for a while and then the issue re-occurs?

 

[bremen1874]

And did you try the Archer with stock firmware? It'd help to tell you whether it's an OpenWRT problem or not.

 

[joeyjojo]

I've never had much luck with QoS, but maybe you've got it working better than I could. I'd turn it off first though to rule it out.

 

[Steveocee]

If you havent already, turn off the QoS to see if it's the router doing what it's meant to do.