Auto neg can cause problems. On Thu, May 27, 2010 at 1:51 AM, Kevin Sullivan <[email protected]> wrote: > No, it's a gig link, set to auto neg. > > Kevin > ----- Original Message ----- > From: "RickG" <[email protected]> > To: "WISPA General List" <[email protected]> > Sent: Wednesday, May 26, 2010 6:55 PM > Subject: Re: [WISPA] Mikrotik routing/queing problem > > > I havent seen that on my RB1000. Do you have the ports locked down to > a set rate? > > On Wed, May 26, 2010 at 1:16 PM, Kevin Sullivan > <[email protected]> wrote: >> I think I have found a legitimate bug. I'm running an RB1000 that >> we put in service about 2 weeks ago (it replaced another RB1000 that was >> having similar problems). Here is what is going on: >> >> Linux router "A" <---------> [ether1] RB1000 [ether3] <-----------> Linux >> router "B" >> >> >> The RB1000 above is connected to the two hosts shown. >> Each link A < > RB1000 < > B has latency ~1ms. We are not using any >> Mikrotik wireless. >> >> A and B both know that they can reach each other through the RB1000 >> (thanks >> to OSPF). >> >> A and B are Linux routers. When I ping B from A (traffic going through the >> RB1000), I get no response. When I log into B and tcpdump traffic, I can >> see icmp echo request packets coming in from A, and echo reply packets >> going >> out to A. Fine. I then log into the RB1000 and packet sniff ether1 and >> ether3. >> >> ether1 packet sniff shows icmp request packets coming in. ether3 shows >> icmp >> request packets going out, and icmp reply packets coming in. However, the >> replies are not going out ether1. >> >> BUT.... after several minutes, A starts seeing replies. >> >> 64 bytes from x.x.x.x: icmp_seq=1049 ttl=63 time=671216 ms >> 64 bytes from x.x.x.x: icmp_seq=1095 ttl=63 time=628217 ms >> 64 bytes from x.x.x.x: icmp_seq=1142 ttl=63 time=584217 ms >> 64 bytes from x.x.x.x: icmp_seq=1188 ttl=63 time=541218 ms >> 64 bytes from x.x.x.x: icmp_seq=1235 ttl=63 time=497234 ms >> >> the RB1000 has been queuing my ICMP packets for ~500 seconds!! >> >> I STOP pinging from A and packet sniff ether1 on the RB1000 again. It is >> STILL sending out queued ICMP replies from A, even though I am >> not sending requests anymore. >> >> Several minutes after I stop pinging from A, the RB1000 stops sending >> replies on ether1. >> >> Clients have been complaining for months about slow speeds passing traffic >> through this router. I've also noticed high CPU utilization, even when >> normal CPU hungry tasks were turned off (one mangle rule, no queues, no >> proxy, no DNS, etc). During the day, we see 70-80% CPU utilization. The >> previous router (same config) went to 100% utilization, which is why we >> replaced it. >> >> Regards, >> >> Kevin >> >> >> >> >> >> >> >> -------------------------------------------------------------------------------- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> -------------------------------------------------------------------------------- >> >> WISPA Wireless List: [email protected] >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ >
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