I seem to remember there is a certain CPU load to manage all the switch ports. Not sure if it depends on whether they are all active.
From: AF <af-boun...@af.afmug.com> On Behalf Of Mathew Howard Sent: Wednesday, March 11, 2020 11:52 AM To: AnimalFarm Microwave Users Group <af@af.afmug.com> Subject: Re: [AFMUG] RB4011 Lockups I think that must have to do with how the CPU is connected to the switch. The test results actually are the same for all of the 512 and 64 byte tests... it's just that the CRS appears to be limited to a maximum of 983.7 Mbps. Probably has something to do with the fact that there are two separate switches in the RB2011. On Wed, Mar 11, 2020 at 11:43 AM Adam Moffett <dmmoff...@gmail.com <mailto:dmmoff...@gmail.com> > wrote: For some reason their test results show 20-40% higher maximum throughput for the 2011 than the CRS125. I recognize that they have the same CPU and RAM, but there must be more to it. .....or maybe the test procedure wasn't consistent I suppose. On 3/11/2020 12:08 PM, Ken Hohhof wrote: CRS125 may be marketed as a “switch”, but CPU and RAM are comparable to several RB series “routers”. I think RB2011 is one of those. From: AF <mailto:af-boun...@af.afmug.com> <af-boun...@af.afmug.com> On Behalf Of Adam Moffett Sent: Wednesday, March 11, 2020 8:24 AM To: af@af.afmug.com <mailto:af@af.afmug.com> Subject: Re: [AFMUG] RB4011 Lockups I relate to "crazy explanations". A lot of the 2nd rate IT crowd stays employed by not admitting when they don't know something. Always hit the client or boss with techno babble and they'll think you're smart, meanwhile failure to admit that their inferences have no underlying factual basis prevents them from actually growing. The worst part is I think most of them actually believe their own BS. </high_horse> If your client is using the CRS as a router then he'll be disappointed. It does run RouterOS, but it's clearly marketed as a switch and has clear and well advertised limits on CPU and memory. It's handy for that one time in 20 when you need your switch to also run an IP tunnel or provide a DHCP relay or some such That said, yes I've had watchdog resets that go away when you disable connection tracking. It's not necessarily RAM though because you can actually crash a CCR 1072 with a couple gigs of traffic and connection tracking turned on. Those have 16GB of RAM and appear to be in no danger of running out of RAM when they die. We could only guess why. In any case if you don't need NAT or Mangle rules then you can safely disable connection tracking with no ill effects. As you say, that might be worth a try on those 4011's. On 3/10/2020 11:14 PM, Ken Hohhof wrote: I don’t have a lot of 2011’s, but other than one that came with one Ethernet port DOA, I don’t think I’ve seen that kind of problem on that model. And mine are outdoors in uncontrolled environments. Well, except for one at my office. One just general comment, are you tracking memory utilization (like graphing via SNMP)? I have a weirdo customer who went from using Linux computers as routers to using Mikrotiks, I think CRS series. He has his own /24 and gets portscanned like crazy and has connection tracking on. He complains that his Mikrotiks keep having to be rebooted or netinstalled and he has all sorts of crazy explanations, but I’m convinced he is just running out of memory due to his conntrack table filling up. Not my problem though, so I’ve avoided getting sucked into it. 2011 has I think 128 MB RAM, the heavier duty Mikrotiks have somewhere around 1 – 4 GB. I mean, I’ve still got a few smaller routers in my network like 493G and 850Gx2 and I don’t see RAM running low, but just tossing it out as a possibility. From: AF <mailto:af-boun...@af.afmug.com> <af-boun...@af.afmug.com> On Behalf Of ch...@wbmfg.com <mailto:ch...@wbmfg.com> Sent: Tuesday, March 10, 2020 6:04 PM To: AnimalFarm Microwave Users Group <mailto:af@af.afmug.com> <af@af.afmug.com> Subject: Re: [AFMUG] RB4011 Lockups Stops handing out IPs and stops passing traffic. From: Colin Stanners Sent: Tuesday, March 10, 2020 4:09 PM To: AnimalFarm Microwave Users Group Subject: Re: [AFMUG] RB4011 Lockups What kind of issue? I haven't heard model-specific bugs with those so they should "just work" forever. On Tue, Mar 10, 2020, 4:57 PM <ch...@wbmfg.com <mailto:ch...@wbmfg.com> > wrote: We have been having a similar issue with a RB2011iL-iN . -----Original Message----- From: Darren Shea Sent: Tuesday, March 10, 2020 3:31 PM To: 'AnimalFarm Microwave Users Group' Subject: Re: [AFMUG] RB4011 Lockups I only have one RB4011 in the field, but it seems to have a problem a couple times a year. I now have it on a remote PDU which can power-cycle it when it stops responding to pings, but if they come out with a f/w fix for this problem, I'd be very interested! -----Original Message----- From: AF [mailto:af-boun...@af.afmug.com] On Behalf Of Nate Burke Sent: Saturday, March 07, 2020 11:24 AM To: Animal Farm Subject: [AFMUG] RB4011 Lockups This week I've had 2 RB4011 Routers lockup requiring a power cycle. They were still passing some traffic, but stopped doing things like handing out DHCP, or responding to SNMP. And you couldn't log into them via Winbox or MACNeighbor. One was on ROS6.44.3, the other on ROS6.45. Both of them were doing NAT, whereas most of my Mikrotiks are only routing. Both of these locations have multiple RB4011s, and only the one doing NAT locked up. Nothing is recorded in the log other than the reboot. These were both routers that have been installed for months. One router lockup I can attribute to a fluke, but 2 in the same week is worrysome. 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