We dropped all routes smaller than a /16, just using a default route for the smaller subnets. That fixed the problem. Looks like it was just the sheer number of routes, as Kevin Myers though.
Kevin From: mikrotik-users-boun...@wispa.org [mailto:mikrotik-users-boun...@wispa.org] On Behalf Of Kevin Sullivan via Mikrotik-users Sent: Monday, May 08, 2017 2:50 PM To: 'Kevin Myers'; 'Mikrotik Users' Subject: Re: [Mikrotik Users] High routing CPU load Thanks. Just for clarification, we're only see 100% load on one core, not on the router as a whole. It's started crashing OSPF occasionally when we log into the router via SSH, as well. It doesn't do that with winbox, only SSH. Kinda weird, since I would think the OSPF stuff would be running through an alternate core, as would the SSH login. Right now we're thinking we're going to have to switch to x86 for more processing power per CPU. Don't see that many options for a pre-built x86, though. Kevin From: Kevin Myers [mailto:kevin.my...@iparchitechs.com] Sent: Tuesday, May 02, 2017 5:11 PM To: Kevin Sullivan; Mikrotik Users Subject: RE: [Mikrotik Users] High routing CPU load If you're advertising a large number of routes to your 31 peers (full or partial tables) then you'll need to adjust your routing architecture somewhat and consider using the CCR1072 more for transit and offload some of the peerings with a larger number of routes onto a CHR or x86 VM with a public route reflector (depends on throughput requirements). You can easily get over 100 peerings on a CCR but the route count has to be lower. Thanks, Kevin Myers MTCINE # 1409 MTCRE, MTCTCE, MTCWE, CCNP, MCP Network Architect / Managing Partner +1 (601) 287-3868 - Mobile (GMT -6) +1 (303) 590-9943 - Office (GMT -6) ipa.kevin.myers - Skype iparchitechs_ms_logo_msp-header-166x46 #1 Ranked MikroTik consulting firm in North America Expert consulting in | BGP | MPLS | OSPF | ISP | Data Center IPA 2017 Conference Schedule - Come meet up with us !! MikroTik User Meeting (MUM) EUROPE - Milan, Italy - March 30th-31st, 2017 WISPAMERICA (WISPA) USA - Memphis, TN - March 14th-16th, 2017 MikroTik User Meeting (MUM) USA - TBA - SPRING 2017 From: mikrotik-users-boun...@wispa.org [mailto:mikrotik-users-boun...@wispa.org] On Behalf Of Kevin Sullivan via Mikrotik-users Sent: Tuesday, May 2, 2017 5:44 PM To: mikrotik-users@wispa.org Subject: [Mikrotik Users] High routing CPU load All, We have an edge router, CCR1072, that has a few 10g internet ports and a 10g connection back to the rest of the network. We're only passing ~1g at peak times currently, but the resources display shows 100% CPU on one of the cores continuously. If we look at the load profiler, it says that "routing" is consuming 100% of that core. We have 31 BGP peers and 25 route filters on the router. I'm wondering what we can do to lessen or spread the load around a bit. Thanks, Kevin
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