4.9 ----- Original Message ----- From: "Josh Luthman" <j...@imaginenetworksllc.com> To: "WISPA General List" <wireless@wispa.org> Sent: Wednesday, May 26, 2010 12:18 PM Subject: Re: [WISPA] Mikrotik routing/queing problem
Also what firmware (sys routerboar pr)? Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 “Success is not final, failure is not fatal: it is the courage to continue that counts.” --- Winston Churchill On Wed, May 26, 2010 at 3:15 PM, Greg Ihnen <os10ru...@gmail.com> wrote: > What version of RouterOS are you running? > > Greg > > On May 26, 2010, at 12:46 PM, Kevin Sullivan 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: wireless@wispa.org > > > > 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: wireless@wispa.org > > 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: wireless@wispa.org 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: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
