[c-nsp] 10GE WAN options for 7606 for market data / micro-bursting

[Pavel Skovajsa]

The WS-X6704-10GE has:
- Xenpacks
- only 16MB buffers per port compared to 200MB on WS-X6708
- is about 5 years old. I remember this was the first 10G card we used
in 6500 back in 2005/6
- traditionally targeted for LAN and DC segment with simple/none QoS
-> hence the QoS implementation is simple based on WRR - see
http://www.cisco.com/en/US/docs/solutions/Enterprise/Video/tpqoscampus.html#wp1072698
- needs a DFC card for ingress 8q8t - see
http://www.cisco.com/en/US/docs/solutions/Enterprise/Video/tpqoscampus.html#wp1072698

Therefore a much better alternative is WS-X6708 or even WS-X6716.
However bare in mind that these are also "LAN" cards therefore might
not suite your QoS needs. For general QoS architecture on C6500 see
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/prod_white_paper0900aecd803e5269.html.

Cisco quickly found out that you cannot do much "sophisticated" stuff
with cards above and came with ES product line for service provider
segment - which is the ES20 and newer ES+
(http://www.cisco.com/en/US/docs/solutions/Enterprise/Video/tpqoscampus.html#wp1072698).

Hope it helps,
-Pavel


On Fri, Jan 29, 2010 at 11:04 PM, Phil Bedard <philxor at gmail.com> wrote:
> The ES20 cards have 512MB, the SIP-600 has 256MB, but I think they both say 100ms unidirectional buffering...  Is there a chance of congesting the egress interfaces where you would need the larger buffers?  They all support LLQ for priority traffic.
>
> Phil
>
>
> On Jan 29, 2010, at 12:22 PM, Matthew Huff wrote:
>
>> We are planning on moving a large portion of our data center to a colo facility at an financial exchange. We will be using redundant 10-GE connections from our existing pair of 7604 to a new pair of 7606 with Sup720-3B. We won't be doing MPLS/VPN, etc... Just normal L3 routing including PIM sparse mode multicast. Since a significant amount of the traffic will be market data, the line rate will be very bursty including micro-bursts. We will be setting up a series of LLQ queues with Modular QoS CLI and are interested in H-QOS, so I have some questions regarding which 10GB interface.
>>
>> The choices are:
>>
>> 1) WS-X6704-10GE. The standard linecard. TX queue of 1p7q8t. 16MB per port buffer
>> 2) 7600-ES20-10G3C. TX queue ??? (configurable ???), buffer size ???
>> 3) 7600-SIP-600 with SPA-10X1GE. TX queue ???, buffer size ???
>>
>> The SIP and ES20 may be overkill, maybe not. We aren't doing MPLS or VRF, or QinQ or any other tunneling, but we need the most flexible, best 10GB WAN interface that can help us deal with bursting/QOS.
>>
>> Any experiences, suggestions, warnings...?
>>
>> ----
>> Matthew Huff       | One Manhattanville Rd
>> OTA Management LLC | Purchase, NY 10577
>> http://www.ox.com  | Phone: 914-460-4039
>> aim: matthewbhuff  | Fax:   914-460-4139
>>
>>
>>
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