The R1 and R2 interfaces are not facing each other, they are both connected separately to the Internet. R1 has a 1 Gig connection, R2 has a 30 Meg connection delivered over 100 Mbps copper.
On Thu, Oct 27, 2016 at 8:35 AM, Steve <li...@wavedirect.org> wrote: > I agree.. make sure you have R1 and R2's connecting interfaces both set to > manual 100FD because it can't go any higher anyway. That is a mismatch. > Not sure if that is THE problem but it is definitely A problem. > > ----- Original Message ----- > From: "George Skorup" <geo...@cbcast.com> > To: "af" <af@afmug.com> > Sent: Wednesday, October 26, 2016 5:24:07 PM > Subject: Re: [AFMUG] Trouble Identifying Throughput Issue > > The manual 100FD interface... what is that talking to? The Auto 1G on > R1? If that's the case, I'd bet that's your problem. Keep in mind that > you cannot run auto on one side and fixed FDX on the other side. This > results in a duplex mismatch. The interface in auto will fall back to > HDX. If you did auto one side and HDX on the other side, they'd both be > HDX, so it would work fine. But obviously half duplex sux. > > On 10/26/2016 1:54 PM, Christopher Gray wrote: > > R1 is the only router with 1 Gbps ports. Everything is auto except 1 > > connection that requires manual settings. > > > > *R1* -- (Auto 1 G FD) ...Internet... (Manual 100 FD) -- *R2 *-- (Auto > > 100 FD) -- *R3* -- (Auto 100 FD) ...M5... (Auto 100 FD) -- *R4* > > > > MTU is set to 1500 on every port (and the UBNT link). > > > > Flow control is off, and none of the interfaces show any pause frames > > received. > > > > > > This is a live link, but it is only running ~ 1 Mbps otherwise. > > > > > > > > On Wed, Oct 26, 2016 at 2:12 PM, Steve <li...@wavedirect.org > > <mailto:li...@wavedirect.org>> wrote: > > > > Few questions come to mind. > > > > Are all set to auto negotiate or are they fixed at 100Mbit? > > What are the MTU's of each connection? > > Flow control turned on? > > > > > > ----- Original Message ----- > > From: "Christopher Gray" <cg...@graytechsoftware.com > > <mailto:cg...@graytechsoftware.com>> > > To: "af" <af@afmug.com <mailto:af@afmug.com>> > > Sent: Wednesday, October 26, 2016 1:57:56 PM > > Subject: [AFMUG] Trouble Identifying Throughput Issue > > > > I have a section of my network that is lacking something, and I can't > > figure out where the problem is. I'm looking for any thoughts / > > suggestions. > > > > 4x MikroTik routers > > > > Link speeds: > > R1 -- (30 Mbps IP / Transport) -- R2 -- (100 Mbps Eth) -- R3 -- > > (75 Mbps > > UBNT M5) -- R4 > > > > The limiting factor for traffic should be the Transport, and I > > expect to be > > able to get 30 Mbps across the system (one-way). > > > > Testing from R1 to R3 runs 30 Mbps. > > > > Testing from R2 to R4 runs 75 Mbps. > > > > Testing from R1 to R4 only runs 10 Mbps (instead of 30). > > > > Tests were one-way btest with 20 TCP streams. > > > > Any ideas for something that would cause this? > > > > >
