[167730] in North American Network Operators' Group
Re: Mikrotik Cloud Core Router and BGP real life experiences?
daemon@ATHENA.MIT.EDU (Eduardo Schoedler)
Fri Dec 27 15:44:09 2013
In-Reply-To: <52BDE4E9.8010808@tomt.net>
Date: Fri, 27 Dec 2013 18:41:24 -0200
From: Eduardo Schoedler <listas@esds.com.br>
To: NANOG <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
How about SMP Affinity in CCR?
System > Resources > IRQ.
2013/12/27 Andre Tomt <andre-nanog@tomt.net>
> On 27. des. 2013 17:26, Jim Shankland wrote:
> <snip>
>
> Routing table size was completely not an issue in our environment; we
>> were looking at a number of concurrent flows in the high-5 to
>> low-6-digit range, and since Linux uses a route cache, it was that
>> number, rather than the number of full tables we carried, that was
>> important.
>>
> <snip>
>
> FYI, Linux no longer has a routing cache, so any performance numbers with
> the cache in place is void on modern kernels. It was deemed too fragile,
> handled mixed traffic badly, and was way easy to DoS. It wasnt simply just
> ripped out of course, the full lookups was made way faster and a bunch of
> scalability issues got plugged in the process.
>
> All in all, in PPS, Linux should now handle mixed traffic much better, but
> less diverse traffic patterns might be a little slower than before.
> However, all in all, much more consistent and predictable.
>
> Not everything is peachy though, there are still some cases that sucked
> last I checked. Running tons of tunnels beeing one. Multicast rx was
> severely gimped for a while after the removal, but that got fixed.
>
>
--
Eduardo Schoedler
