[AusNOG] Scaling beyond 1Gbps transit

Wed Sep 25 17:18:33 EST 2013

I would have assumed it was 512K IPv6 or 1.5m IPv4 or a mix of the two, given IPv6 entries will consume more memory you should get less of them in the same amount of space.

I'd imagine you would not fit 500k IPv4 and 1m IPv6 entries, rough math would put that at around 333k ipv6 with 1/3 max IPv4 (500k) used.

It's generally given as a maximum for either (not both) and you can shift them around (or it will) to suit.

Assumptions from past experience, don't take these as gospel.

Thanks,
Ayden Beeson

From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Joshua D'Alton
Sent: Wednesday, 25 September 2013 2:41 PM
To: Shane Short
Cc: AusNOG at lists.ausnog.net
Subject: Re: [AusNOG] Scaling beyond 1Gbps transit

I'd think they mean <512k not <512, and from what I understand they are not hard limits, it is merely a general guide of the amount you can expect to fit in RAM. IE, you could have 500k ipv4 and 1mil ipv6, or any combination that will fit in FIB (CEF for cisco, not sure of brocade term?)

On Wed, Sep 25, 2013 at 12:50 PM, Shane Short <shane at short.id.au<mailto:shane at short.id.au>> wrote:
I note the documentation states 1.5mil IPv4, but <512 routes for ipv6.. is this a typo, or is it tuneable?

James Braunegg wrote:
Dear James

We had this very debate back in 2010 we were using Cisco 7200 G2 at our pop sites and they would just die under pressure .... Even more so when you started to flow traffic.

We looked at the Cisco ASR, Brocade MLXe and Juniper MX routers all of which were stupidly large from a capacity point of view .... We ended up choosing the Brocade MLXe platform and it's been a choice which I'm very happy with..... Lots of ports, lots of capacity and huge amounts of performance.

That being said as mentioned you also have the Brocade CER RT which is a 1RU box like a MLXe but cut down in physical size single routing engine but still supports 4 x 10gbit interfaces and 1.5 million routes.

Kindest Regards

James Braunegg
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From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Colin Stubbs
Sent: Tuesday, September 24, 2013 10:44 PM
To: james.mcintosh at rocketmail.com<mailto:james.mcintosh at rocketmail.com>; AusNOG at lists.ausnog.net<mailto:AusNOG at lists.ausnog.net>
Subject: Re: [AusNOG] Scaling beyond 1Gbps transit

Since a bunch of people chipped in with the ASR option, which are great and can be quite attractive with the lower end/priced bundles..... a few words of warning.

They're complicated boxes so make sure you're familiar with the ASR architecture including what components exist within each box. In particular what components have their own discrete memory; along with what those memory requirements will be within your particular network using your particular configuration.

e.g. If you take MPLS all the way to the edge and are encapsulating a full Internet routing table that will impact memory requirements within the ESP. There are workarounds but on 1K consider an ESP 10G at a minimum.

Colin Stubbs | Equate Technologies
Level 27, Santos Place, 32 Turbot Street, Brisbane, QLD 4000
T: +61 7 3181 5558 | M: +61 488 000 977<tel:%2B61%20488%20000%20977>
E: colin.stubbs @ equatetechnologies . com . au

On 24 September 2013 18:00, Lindsay Hill <lindsay.k.hill at gmail.com<mailto:lindsay.k.hill at gmail.com>> wrote:
There are some ASR1K bundles you can get that include reasonably priced 10Gb ports.

If you don't get those ports via the bundle price, then yes, they blow the cost out of the water. I've seen some scenarios where it's almost worth buying a 1001 just to get bundled 10G adapters, that you then use somewhere else.

On 24/09/2013, at 7:24 PM, Tom Lanyon <tom+ausnog at oneshoeco.com<mailto:tom%2Bausnog at oneshoeco.com>> wrote:

> On 24/09/2013, at 4:21 PM, Skeeve Stevens <skeeve+ausnog at eintellegonetworks.com<mailto:skeeve%2Bausnog at eintellegonetworks.com>> wrote:
>> 600Mbps is almost the limit for a 7201 (1Gig TP maximum theoretical).
>>
>> Go an ASR1002 or Juniper MX5 - both make great cheap bgp border routers.
>>
>> Yes... 10Gb interfaces is the way to go.... or just multiple 1Gb upstreams?  With that much traffic, you should be diverse anyhow.
>
> 10Gbps interfaces are still relatively expensive[1] on the ASR1000 platform, when you consider the pricing of 7200 series[2] gear which it is replacing.  Is the situation better with the MX?
>
> I don't have any experience with them, but would an ASR9001(-S) actually be a better choice for 10Gbps, considering the 4x built in 10Gbps SFP+ ports and cheaper-per-10Gbps modular port adapters?
>
> -Tom
>
>
> [1] Somewhere around $12k for a single port SPA-1X10GE-L-V2?  and some crazy figure for the WAN PHY version (which I assume just has big buffers?)..
>
> [2] Understanding, of course, that this product line is EOL.
>
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