[Gllug] Problem with new Virgin 50Mbps Modem

Christopher Hunter cehunter at gb-x.org
Wed Mar 28 05:54:59 UTC 2012

On Tue, 2012-03-27 at 18:52 +0100, Alain Williams wrote:
> You may be interested in the solution for a customer of mine who recently
> installed (upgraded to) the Virgin 50Mbps Super Hub.
> The symptoms were lost packets, this badly affected incoming emails (we run an
> MTA) especially, for some reason, those from google/gmail. There was (I think)
> also a problem with an SSL session.
> The fix is to set the MTU to 1460. We did that with an immediate improvement.
> The sad thing is that we have been beating our heads on the table for a week,
> with various Virgin support droids blaming our config.
> On a redhat system edit /etc/sysconfig/network-scripts/ifcfg-eth0 and
> insert the line:
>     MTU=1460
> After fixing it you will see 1460 as in below:
> # ifconfig eth0
> eth0      Link encap:Ethernet  HWaddr 00:0D:56:64:3A:C6  
>           inet addr:  Bcast:  Mask:
>           inet6 addr: fe80::20d:56ff:fe64:3ac6/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1460  Metric:1
>           RX packets:31171623 errors:4 dropped:13 overruns:0 frame:0
>           TX packets:19810324 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000 
>           RX bytes:4150314049 (3.8 GiB)  TX bytes:3814195185 (3.5 GiB)
>           Interrupt:201 

I'm very surprised that this has only just made it to this list - it's a
problem that's been around on Virgin ("on the ridiculous") since they
"upgraded" the network they inherited from Telewest.

One thing that hasn't changed - they don't understand the problem and
won't accept that there could be anything wrong with their network.

As ever, my advice remains the same - if possible, find ANY other way to
get connected - Virgin are a clueless bunch of clowns who overcharge for
a fundamentally (and deliberately) broken service.  

They "shape traffic", which is a euphemism for "cripple your rate" at
peak times, they sell your browsing data to advertising companies (the
"Phorm" débâcle was just the start) and their "support" is laughable.
Like most nasty things - best avoided!


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