ASUS DSL-AC68U Not connecting with high CRC errors
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ASUS DSL-AC68U Not connecting with high CRC errors
13-07-2016 10:03 PM
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I'm trying to get my ASUS DSL-AC68U working with Fibre Broadband. I had it working correctly with normal ADSL, but I can't get it to connect for Fibre. I've looked at all of the settings suggested on the forum, but none are giving me a connection. The Plusnet router works OK, but I'm not getting a great download speed via speedtest - less than 10Mb on what should be a 50Mb connection.
I've attached a number of screenshots of my configuration. The DSL Status is showing that the line is up, but the general log is showing repeated LCP: timeout sending Config-Request errors. I've noticed that there are a very high number of CRC errors - this number shoots up very quickly to the thousands within minutes.
I've installed the latest firmware from ASUS from the 7th July 2016.
Any ideas?
Re: ASUS DSL-AC68U Not connecting with high CRC errors
13-07-2016 11:05 PM - edited 13-07-2016 11:05 PM
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Hi
have you tried the auto-settings for Plusnet as I find they work fine for my router. If you factory reset it will ask you who your fibre is with and it will auto detect. I also have the same firmware and find the settings work well.
Re: ASUS DSL-AC68U Not connecting with high CRC errors
14-07-2016 2:27 PM
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I'm using the same router and firmware without any major issues. I think your problem may lie with your choice of DSL settings - the ones you are using may be 'fighting' BTOR's own Dynamic Line Management (DLM), which automatically sets the maximum achievable speeds for your line. I'm attaching a screenshot of my own settings for you to try.
Re: ASUS DSL-AC68U Not connecting with high CRC errors
14-07-2016 3:53 PM
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Thanks for the information - I had gone for the default settings to begin with, but when it wasn't connecting at all I tried anything else I could find on the forum last night.
I'd already proved out that fibre was working with the plusnet router, but didn't run a speed test initially. After plugging it back in, whilst the plusnet router was showing it was connecting at around 55MB, when I ran the speed test afterwards, it was barely hitting 10MB. This combined with the CRC errors shown in the ASUS led me to think there might be a fault, which I've raised today.
It looks like from the ticket that Plusnet agree there is an fault, so it will be interesting to see if I can get the ASUS working after the fault has been fixed.
At the moment it's in Dual WAN mode, so that I don't have to reconfigure all of my wireless devices, with an uplink from the Plusnet router. That wasn't entirely clear how to configure either (You need to run the ASUS in a different subnet and enable NAT).
Re: ASUS DSL-AC68U Not connecting with high CRC errors
12-12-2016 3:20 PM
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So - quick (late) update. The problem was the wire from house to pole (which was akin to a bit of bell wire from the 1970's apparently). Was replaced by the BT engineer and everything started working as it should be, with the expected speed.
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