[c-nsp] WS6548 pericles with port/ether-channels

[Christian Schmutzer]

hi,

if you have a sup720 in your system you should always look at 67xx 
cards. only if you use sup32 you need to look at 61xxA or 65xxA cards 
because these cards do not require a fabric connection.

also be aware that 65xxA cards are priced at same level as comparable 
67xx cards (without DFC3) ... so the $$$ should not be the reason for 
using a 65xxA card with sup720

christian

Tom Sands wrote:
> The architecture of the 6548 card is pretty close to the 6148 card.. The 
> important thing for you is knowing that both of them are over subscribed 
> 8:1 and have shared buffer space per 8 ports.  So the card only has a 
> 8Gbps switch fabric total.
> 
> read the CEF265 characteristics more again, just because the classic bus 
> is 32Gbps, doesn't mean the card itself can sustain that.
> 
> The Cisco Catalyst 6500 Series Cisco Express Forwarding 256 10/100 and 
> 10/100/1000 interface modules offer the following operational advantages 
> and characteristics:
> 
> • Forwarding architecture-These modules use the central Cisco Express 
> Forwarding engine located on the supervisor engine.
> 
> • Forwarding performance-These modules forward packets up to 30 Mpps per 
> system and up to 15 Mpps per slot if upgraded to support distributed 
> forwarding.
> 
> • Fabric connection-These modules connect to the switch fabric through 
> one 8-Gbps connection and the 32-Gbps shared bus.
> 
> 
> 
> The 6748 is subscribed at 1.2:1 (40Gbps) with dedicated buffers per port
> 
> 
> ------------------------------------------------------
> Tom Sands			  				
> Chief Network Engineer				
> Rackspace Managed Hosting	    	
> (210)447-4065		   	
> ------------------------------------------------------
> 
> 
> Moerman, Maarten wrote:
>> Sorry for my outlook not correctly quoting (Quotefix doesn't work for
>> some reason)
>>
>> However, the 6548 has a 32gbit shared bus. My thoughts where that it
>> should be possible to have 2 * 8gb and 1 * 2gb running on that.
>>
>> On the 6148's I do not have problems, as I'll be using them only for
>> connecting normal 1gbit ports, without much traffic on it.
>>
>> I just found out that the 6748's are only about 1k more then the 6548's,
>> so it shouldn't be a big problem, however, I find the cisco not very
>> clear on this.
>>
>> Maarten
>>
>> -----Original Message-----
>> From: Will Hargrave [mailto:will at harg.net] 
>> Sent: Tuesday, December 05, 2006 11:55 AM
>> To: Moerman, Maarten
>> Cc: cisco-nsp at puck.nether.net
>> Subject: Re: [c-nsp] WS6548 pericles with port/ether-channels
>>
>> Moerman, Maarten wrote:
>>
>>
>>> I just bought these freakin expensive WS6548GE-TX boards, in order to
>>> correctly implement portchannels ,and get rid of the 1gb limit the
>>> 6148's have. As been told by the cisco site, the cisco site also
>>> mentioned that the 6548's do not have ratelimit problems. So I'm
>>> implementing those.... 
>>
>> 1gb limit on 6148? it has a classic bus (32gbit) connection. What
>> problems have you been having with these?
>>
>>
>>> I needed to have 2 port channels of 8gb and one of 2gb. Is this
>> possible
>>
>>> in my configuration? I have 7604's with Sup730-3BXL, no money spared
>> on
>>
>>> those. And now I've found out that after the cisco site giving me
>> wrong
>>
>>> information, I can't get this fixed. 
>>
>> 6548 is a CEF256 card.. they have a single 8Gbps fabric and a 32Gbps
>> shared 'classic' bus connection.
>>
>> http://www.cisco.com/en/US/products/hw/modules/ps4835/products_data_shee
>> t0900aecd8017376e.html
>>
>> Not what you wanted to hear, but you should have really bought
>> WS-X6748-GE-TX. 67xx cards have CEF720 fabric connections (2x20G) which
>> means they operate optimally with SUP720.
>>
>> Will
>>
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> 
> 
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