[f-nsp] J-BxGMR4 and BGP + Bandwidth

[Jeroen Wunnink]

While debugging with 'dm' and 'hw' commands (TAC looked at it too), it 
turned out that the hardware was simply dropping packets internally. And 
the more BGP peers and prefixes were added (AMS-IX based router), the 
faster packets would get dropped in hardware.

No idea what the actual technical explanation was for it, but in the end 
we pulled the BI's from doing BGP and installed XMR's for routing (i)BGP 
tables. (which was a relief to say the least :-)

For basic L3 and L2, the Jetcores perform just great, just don't stress 
them out too much, because they start acting up from my experience.


On 4/7/10 10:36 AM, Clement Cavadore wrote:
> Hi,
>
> Strange issue.
>
> I have been using a couple of BI4k Jetcore for years, with B2x10G,
> BGP/OSPF, untill exhaustion of the machines: 16 Gbit/s of UDP audio
> streams.
>
> The limiting stuff was the 8Ge backplane per card (servers on a J-B16GC,
> intercos on 10G upstreams).
>
> Regards,
>
>
> Clément
>
> On Wed, 2010-04-07 at 09:20 +0200, Jeroen Wunnink wrote:
>    
>> Sure, the BI will run several full tables with no problem.
>>
>> But the problem I (and a customer recently with his own BI) ran into,
>> aside from a very small CAM table running full very quickly, was
>> unexplainable packetloss at 200Mbit+ traffic levels.
>> It was a very minor amount of loss (0.1% to 0.5%), but noticable
>> enough to make it unusable for UDP audio streams.
>>
>> And I've seen this only on BI's doing BGP, I have several BI's doing
>> basic L3 (gateway for vlans, ospf, etc) with no problems.
>>
>> So if you can avoid it, don't use the Jetcores for BGP related work.
>>
>> On 4/6/10 6:30 PM, Chuck Ufarley wrote:
>>      
>>> Hi all--
>>>
>>> I'm trying to figure out if I can run 500k - 600k routes of a full
>>> BGP table on a standard J-BxGMR4 (512MB) with a BigIron 4000
>>> chassis.  At this point I'm thinking no, but is anyone running
>>> anything like it?
>>>
>>> And looking at Foundry/Brocade's site doesn't give me much
>>> information, but does anyone have the specs on how much traffic a
>>> B4000 can handle at one time?
>>>
>>> Any direction on how to find this info without bothering you again
>>> would be great, too.  Sorry to be a bother.
>>>
>>> And thanks!
>>>
>>> --Chuck
>>>
>>> _______________________________________________
>>> foundry-nsp mailing list
>>> foundry-nsp at puck.nether.net
>>> http://puck.nether.net/mailman/listinfo/foundry-nsp
>>>        
>> -- 
>>
>> Met vriendelijke groet,
>>
>> Jeroen Wunnink,
>> EasyHosting B.V. Systeembeheerder
>> systeembeheer at easyhosting.nl
>>
>> telefoon:+31 (035) 6285455              Postbus 48
>> fax: +31 (035) 6838242                  3755 ZG Eemnes
>>
>> http://www.easyhosting.nl
>> http://www.easycolocate.nl
>>
>> _______________________________________________
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>>      
>
>    

-- 

Met vriendelijke groet,

Jeroen Wunnink,
EasyHosting B.V. Systeembeheerder
systeembeheer at easyhosting.nl

telefoon:+31 (035) 6285455              Postbus 48
fax: +31 (035) 6838242                  3755 ZG Eemnes

http://www.easyhosting.nl
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