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Workaround for dealing with inconsistent upload speeds

We have 3 locations - one hosts the UTM9 and two have RED50 devices linking our sites together for voice and data. All sites have download/upload speeds of 100/20 mbps. Because everything routes through the UTM, however, the reality is that our two RED sites download speed is limited to the upload speed at the UTM host site.  So computers on our network at that location max out at about 18-20 mbps, even though download speed tests at 100+ when connected directly to the cable modem before the RED.

In general, this setup has been fine because our provider has been consistent. But when the cable provider (Comcast) has upstream issues, performance really degrades. For example, we've been dealing with inconsistent, slow upload speeds (5-7 mbps) at the UTM host site for about 2 weeks. As a result the download speeds for computers connected our other RED sites has been about 2.5-5 mbps....which sucks.

Is there a work around for this issue that wouldn't involve adding a UTM at each site? Is there a better way to configure things to keep our sites connected with the REDs but take advantage of the full bandwidth available to us?



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Parents
  • John, are these really cable modems?  I have two clients on the East Coast that have had problems with Comcast's Ethernet feeds from a fiber switch in their building.  In both cases, the solution was to configure the NIC for the External interface to fixed 100Mbps/Full and have Comcast configure their port to us for the same.  You also might try 100/Half.

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
Reply
  • John, are these really cable modems?  I have two clients on the East Coast that have had problems with Comcast's Ethernet feeds from a fiber switch in their building.  In both cases, the solution was to configure the NIC for the External interface to fixed 100Mbps/Full and have Comcast configure their port to us for the same.  You also might try 100/Half.

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
Children
  • Yes - each site has Comcast Business Class internet with their own cable modem, not Comcast's metro ethernet product (which would have been a very pricey implementation for us)

  • Then try #7 in Rulz - any luck?

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
  • No QoS bandwidth limiting enabled, have checked cables, etc., and my UTM does have the Intel 82574 based NIC.  The system has been fine when we have solid upload speeds. I think my issue simply won't be resolved in my current config without Comcast correcting my upload speeds. 

    The only solution I can think of would be to place a UTM at each site to do filtering and link them through a site to site VPN, as opposed to having one UTM do all the heavy lifting and RED devices that just pass traffic back to the head unit.

    Does that make sense?

  • I would recommend an SG 115 at a minimum and getting your reseller involved.

    Cheers - Bob

    PS You did try the speed/duplex settings - right?  That is still my best guess, but you didn't fit the profile of my clients, so I figured you should go through all of #7.

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA