[c-nsp] 3560G as WAN-aggregation-layer

Tony Varriale tvarriale at comcast.net
Mon Feb 8 23:25:44 EST 2010

Care to share your server farm experience?

There are many that do what you are trying to do as long as you understand 
the limitations and differences in QoS/etc (compared to routers).

G1s, although being part of a software platform, are decent horsepower.  If 
you are looking at some shaping/policing down from gig you may want to be 
careful (especially on multiple).  But, if it's a 100mb line and you want to 
play they will do fairly well.

----- Original Message ----- 
From: "Jeff Bacon" <bacon at walleyesoftware.com>
To: <cisco-nsp at puck.nether.net>
Sent: Monday, February 08, 2010 5:09 PM
Subject: [c-nsp] 3560G as WAN-aggregation-layer

> Greetings.
> I know this is going to sound pretty, well, lame. But...
> I currently have a couple of routers (a 7204/NPE-G1 and a 3845)
> front-ending my WAN connections, which are all metro Ethernet, mostly
> gig ports which are policed at some CIR, or 100Mbit. The routers are
> big, expensive, and really don't do much - oh, someday I would like to
> do some QoS...someday.
> So, there is this pile of 3560Gs in the corner. I've had
> less-than-impressive experiences with them as server-farm access
> switches, which is why they are there. However, I'm thinking that for
> handling a handful (4-6) of Gig-Es/100Ms which are mostly not running at
> capacity, as long as I distribute the ports out amongst the port ASICs
> (so each line has the full 2Mbit TX buffer of the port ASIC to itself),
> and as long as I don't do something stupid like put all 4 ports of a
> 4-port etherchannel in ports 1-4, they ought to be fine.
> The switches don't need to do much - pass the traffic, run EIGRP, a
> little light QoS. Our route table is tiny, relatively.
> Am I going to regret this?
> Conversely, how much can I really expect out of an NPE-G1?
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