Superhub : Superhub & Virgin Media Business

[itcomms]

correct, but no static IP

[Andrewcrawford23]

i have jsut been thiinking, this is goign to sound ridilkous but not impossible

i jsut read that plenty of people on business are having problems with email servrs.

well on residental lines virign block port 25 due to potential spam so peopel cant set up ther eown server.

i wonder if some idiot has not unblocked port 25 for business cusotmers?

[ccarmock]

Port 25 isn't blocked on the business service, but the Superhub causes problems, we think related to MTU for inbound SMTP connections.

[Andrewcrawford23]

Originally Posted by ccarmock

Port 25 isn't blocked on the business service, but the Superhub causes problems, we think related to MTU for inbound SMTP connections.

fair enough just wanted to be sure as wouldnt surprise me if virign had

[itcomms]

I can also confrim port 25 is NOT blocked on residental as we had an exchange server at home with no issues.

We have no trust in VM with the superhub, we are getting BT FTTC installed at the end of this month and VM will be used as a backup connection and will remain at 10MB

we have already lost £10k in lost sales due to the SH

[qasdfdsaq]

Aside from BT FTTC being a better service overall I'd have switched over a long time ago if I knew it was going to cost me any more than £20 not to!

[APS]

Well this discussion continued on the VM communities forum but was just closed by a moderator on that forum - stating that all business internet problems should only be discussed on the phone! Well I don't think he can censor discussion here.

As an update I can confirm that reducing the MTU size in our router has solved the Exchange problem we also encountered after installation (although it was not evident at first).

I since had a call returned from Business Faults who tried to tell me to do the very same fix, i.e. to set the MTU value in the email server or the router (if you have one) depending on type of setup. They were not quite clear as to the best value to use, but something under 1460 was advised.

The guy also told me they had a new version of firmware was being tested "next week". He did not know how it fixes having this restricted MTU (I found most PPPoE networks use 1492) but said they were working on this issue and also some other issue with the tunnel dropping occasionally.

[itcomms]

we are now hitting real problems with downgrading to the 10MB service due to limited bandwidth (Upload speed) with our VoIP Phone System.

so we are really on to a no winner here.

Our offices are serviced by both BT(ADSL Maxi) and (Virgin Media)

to operate we need at least 1.5MB upload speed.

BT can't give us enough bandwidth until FTTC is enabled, Virgin 10MB is not really fast enough, 20MB does not have static IP Address, and 50MB is full of faults.

Leased Lines is £1200 per month, we have now changed the codec on the phone system from G711 to G729 which will lower the bandwidth usage so will keep an eye on this.

I hope VM don't take too long in fixing the issues.

[MovedGoalPosts]

<------ Is slightly worried since his office is about to be upgraded to 50meg on Monday. Not quite sure how the superhub, even with a dynamic IP, is going to integrate into a dual WAN routed system so we can use either cable or and ADSL2 connection if one goes a bit wonky.

[qasdfdsaq]

Does 20mb (performance wise) work for you? If this is business critical, then there are ways of getting a static IP address by bypassing Virgin Media. It's a dirty hack, but does do the job.

Alternatively, some ADSL ISPs offer line bonding, which along with doubling your download speed also doubles your upload speed, but those options are expensive for what you get.

[APS]

Rob: FYI we have a dual WAN device (SonicWall) now with the 50 Mb VM and Zen ADSL (Max) and now email is flowing OK it seems to be functioning OK. We do not have VOIP (other that the occasional Skye call). We did opt for the 5 fixed IPs with a subnet.

[ccarmock]

I see VM decided to shut the thread down on the community forum about this.

However I just wanted to post here (as I can't there!) that changing the config of the Cisco router I have behind the Business Superhub with ip mtu 1460 on the WAN interface and ip tcp adjust-mss 1420 on the internal VLAN1 interface seems to have fixed the email delay problems I had been experiencing.

[itcomms]

are you getting any errors in the logs?

why such a drop in MTU Size? surely this can cause issues with networks sending packets larger then your MTU?

[MovedGoalPosts]

Superhub installed with dynamic IP. Installer had a bit of a fiddle in the street cabinet as he checked signal levels. Ethernet between LAN port and WAN2 port of our Draytek Vigor 2920 dual WAN router as a straight swap for the old Cisco modem. Not even a router reboot and all works fine.

I've disabled the wireless, without any testing of it. No real need for it as the Superhub is on the wrong part of the network configuration to allow any wireless connected devices to obtain stuff from our LAN servers. It's for that reason that I'd suggest in many business locations the Superhub provides more functionality than is needed, and thus may be a tad more expensive to provide to customers than an alternative chocie of a SACM. Seems a shame that the Cisco modem, only a year old, is now confined to a spares shelf to gather dust.

[itcomms]

Rob, do you not have any mail servers?