We had an issue with a Comcast SMCD3G small business modem earlier with one of our devices. With autodetect on both sides, we only get about 10-15 mbps throughput out of a 50mbps circuit. A PC connected directly to the modem will get the full speed, however.
By forcing the Comcast modem to do 100 mbps Fast Ethernet, Full-Duplex and the pfSense device to auto-detect, we were able to get the full speed. I am not sure it is relevant or not to your case. I think it depends on the PHY, and there might be some incompatibilities at the physical layer. Our device has two lowly RTL8100B Realtek 10/100 Fast Ethernet ports, and that's why we only force 100m/Full-Duplex on the Comcast. Forcing on our device does no good. On Thu, Sep 12, 2013 at 11:11 AM, Adam Piasecki <[email protected] > wrote: > The switch internally to the LAN Cisco 2960, i've pushed way more through > it then what i'm doing here, it's been installed for a couple of years > without a problem. The CPU is only at 15-20%. The WAN is a direct > connection from the pfsense to the cable modem. All my NICs in the pfsense > are (em). Running 2.0.1. I'm going to upgrade and swap the pfSense to 2.0.3 > just to eliminate any faulty hardware/software. > > > > On 9/12/2013 2:03 PM, Christian Borchert wrote: > >> What's the CPU and RAM utilization on the switch? What's its spec'd >> packet forward rate? >> >> It sounds to me like this is where the problem is. >> Sent via BlackBerry from T-Mobile >> >> -----Original Message----- >> From: Adam Piasecki <[email protected]> >> Sender: [email protected].**orgDate: Thu, 12 Sep 2013 13:40:33 >> To: <[email protected]> >> Reply-To: pfSense support and discussion <[email protected]> >> Subject: Re: [pfSense] pfSense and Cable Modem Throughput >> >> On 9/12/2013 1:25 PM, Matt Smith wrote: >> >>> On Sep 12, 2013, at 10:28 AM, Adam Piasecki <[email protected]> >>> wrote: >>> >>> First I'm almost certain this is a cable modem/provider problem. We >>>> have a 20mb ethernet circuit that works fine with the same pfSense. >>>> >>>> We upgraded to a 100/10mb cable modem, when we put this on the WAN of >>>> the pfsense, we are getting major packet loss during peak times, and speed >>>> test sites that won't even load. Non-peak times we get no packet loss, good >>>> speed tests (50+mb) >>>> >>>> The problem I'm having is that when we take the pfSense out and plug a >>>> PC directly into the cable modem, the speedtests look fine and the dropped >>>> packets go away. Both during peak times and non-peak. >>>> >>>> My thought is the number of packets going over the cable modem with the >>>> pfSense is a lot greater then just one PC doing a speedtest, and the cable >>>> modem can't handle it. We have about 100 clients behind the pfSense trying >>>> to access the internet during peak times. The traffic graphs on pfSense >>>> only indicate we are doing 5-10mbs download and 1-5 upload, so we are no >>>> where near maxing out the cable modem bandwidth wise. >>>> >>>> I've checked wan ethernet settings 1gig full duplex, no collisions or >>>> errors on the pfSense side. I don't see any problems in the log, we are not >>>> doing any traffic shaping. >>>> >>>> What's the MTU set to on the WAN interface of the pfsense box? The >>> cable modem may be encapsulating traffic in PPP or doing some other form of >>> tunneling. You might check if large packets are being dropped somewhere >>> upstream. You can run ping with a large packet size and the do not fragment >>> bit set to check this. E.g. 'ping -s 1472 -D <some_internet_host>'. >>> >>> -Matt Smith >>> >>> ______________________________**_________________ >>> List mailing list >>> [email protected] >>> http://lists.pfsense.org/**mailman/listinfo/list<http://lists.pfsense.org/mailman/listinfo/list> >>> >> Okay, i'll try this, it's 1500 the default. >> >> ______________________________**_________________ >> List mailing list >> [email protected] >> http://lists.pfsense.org/**mailman/listinfo/list<http://lists.pfsense.org/mailman/listinfo/list> >> ______________________________**_________________ >> List mailing list >> [email protected] >> http://lists.pfsense.org/**mailman/listinfo/list<http://lists.pfsense.org/mailman/listinfo/list> >> > > > ______________________________**_________________ > List mailing list > [email protected] > http://lists.pfsense.org/**mailman/listinfo/list<http://lists.pfsense.org/mailman/listinfo/list> > -- Best Regards. Bao C. Ha Hacom - Embedded Systems and Appliances http://www.hacom.net voice: (714) 564-9932
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