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/
