[AusNOG] Microtik bgp issues

Wed Nov 5 12:16:22 EST 2014

☺ I had it confirmed on the forums hardware limitation, something about the driver being single threaded. Potentially solved in the ROS7…. But..

Alex

From: Damien Gardner Jnr [mailto:rendrag at rendrag.net]
Sent: Wednesday, 5 November 2014 12:15 PM
To: Alex Samad - Yieldbroker
Cc: Beeson, Ayden; Joseph Goldman; ausnog at lists.ausnog.net
Subject: Re: [AusNOG] Microtik bgp issues

I have that same issue on the CCR1009 - can't push more than 700mbps on a single TCP stream. I can get it to 900 if I disable ip conntrack and filtering entirely, but that isn't really an option unless I want more hardware to offload that job.

On Wednesday, 5 November 2014, Alex Samad - Yieldbroker <Alex.Samad at yieldbroker.com<mailto:Alex.Samad at yieldbroker.com>> wrote:
Hi

It does cause a problem for individual tcp streams
I have some CCR1036-8G-2S+ with 10G links. I can push 9+Gbs of udp and 9+Gbs combined tcp. But I can’t push a single tcp stream past 1G.  because of cpu..

Alex

From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net<javascript:_e(%7B%7D,'cvml','ausnog-bounces at lists.ausnog.net');>] On Behalf Of Beeson, Ayden
Sent: Wednesday, 5 November 2014 12:04 PM
To: 'Joseph Goldman'; 'ausnog at lists.ausnog.net<javascript:_e(%7B%7D,'cvml','ausnog at lists.ausnog.net');>'
Subject: Re: [AusNOG] Microtik bgp issues

AFAIK it can use them all, just not for BGP. Packet handling etc is all multi-core now as I understand it.

http://www.mikrotik-routeros.com/tag/multicore/ seems to have some really good stuff in the linked presentation for those interested.

Thanks,
Ayden Beeson

From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net<javascript:_e(%7B%7D,'cvml','ausnog-bounces at lists.ausnog.net');>] On Behalf Of Joseph Goldman
Sent: Wednesday, 5 November 2014 12:01 PM
To: ausnog at lists.ausnog.net<javascript:_e(%7B%7D,'cvml','ausnog at lists.ausnog.net');>
Subject: Re: [AusNOG] Microtik bgp issues

ROS7 is when these improvements will come. Only slight improvements making it into ROS6. ROS7 beta is hoping to be released Q1 2015 at this rate, based on info from Janis in a support ticket I had with him.

I was thinking they were delaying the CCR1072 for ROS7 release together, but Janis confirmed CCR1072 will release with ROS6 :( WHy have 72 cores if can't use them all lol.
On 05/11/14 11:37, Damien Gardner Jnr wrote:
Ahhhh, that'd explain why I have one CPU core constantly at 100% :)

Any idea how far away those enhancements are? :)

On 5 November 2014 11:30, Mike Everest <mike at duxtel.com<javascript:_e(%7B%7D,'cvml','mike at duxtel.com');>> wrote:
There is an AU mikrotik mailing list (http://talk.mikrotik.com.au) frequented by many mikrotik pro folks who do that kind of thing on a day to day basis.  Some of them are also consultants who can take on a project for you, plus all of the major distributors usually have engineering team available fo that sort of support contract.

One thing to watch out for, though, is that there does still exist a limitation with routerOS that allows only a single CPU core for bgp and routing table processing, so for busy routers with large bgp tables and regular updates, it is not so uncommon that one cpuy core will peg and raouting updates start to suffer.  It does need several tens (perhaps 100s) of thousands of route prefixes to show up this problem, but it sure can be a showstopper for major nodes.

Since routerOS is based on linux kernel, updates to kernel code to support multi-core enhancements will (apparently) eventually overcome that limitation ;)

Cheers!

Mike.

From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net<javascript:_e(%7B%7D,'cvml','ausnog-bounces at lists.ausnog.net');>] On Behalf Of iQ Net
Sent: Wednesday, 5 November 2014 9:07 AM
To: ausnog at lists.ausnog.net<javascript:_e(%7B%7D,'cvml','ausnog at lists.ausnog.net');>
Subject: [AusNOG] Microtik bgp issues

Hi Guys,

Just wondering if anyone out there has had success with bgp on the microtik's and I can pick your brain?

I've got a CCR1009 and I'm struggling to get the BGP session established. Can telnet to 179 on my providers router and it looks like the settings I've got are correct but its failing to establish a connection...

Any suggestions?

Or anyone do any consulting on list that can give me a (paid) hand at all?

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