10GBase-t switch

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1

Date: Thu, 11 Mar 2010 12:26:16 +0900
From: Randy Bush <randy@psg.com>

> arista 7120t-4s...

hot box. but you are giving away the secret sauce!

Hot box for the datacenter, but small buffers make it unsuited for
long distances. In the right place, this box can't be beaten in the
price/performance realm.

Some of their salescritters can be annoying, too, but YMMV. We may have
just hit a bad one.

2

"Arista EOS" - what good/bad things do you have to say about their
management capabilities? which "known" brand can it be compared to?

thanks,
raoul

3

"Arista EOS" - what good/bad things do you have to say about their
management capabilities? which "known" brand can it be compared to?

I couldn't help myself thinking that the name of an operanting system
shouldn't resemble "End of Sales" that much.

Rubens

4

Do the Arista switches support netflow? From a management perspective netflow can be vital. This is something we have been unhappy with on our 3560 and 3750 cisco's.

Dylan

5

Hi,

6

Hi,

7

Kevin Oberman wrote:

Date: Thu, 11 Mar 2010 12:26:16 +0900
From: Randy Bush <randy@psg.com>

arista 7120t-4s...
      

hot box. but you are giving away the secret sauce!
    
Hot box for the datacenter, but small buffers make it unsuited for
long distances. In the right place, this box can't be beaten in the
price/performance realm.

Can you point to another 1U box that has more than 16MB per-port buffer?

-Dave

8

They don't (yet). Given you buy enoughboxes, Arista may be willing to
implement this feature. Would like to have this as well.

Arnold

9

And if you have to request a vendor of L2 devices to implement something
in this sense then definitely ask for sFlow.

Cheers,
Paolo

10

If 10GTX isn't a hard requirement, SPF+ & CX4 are supported in a similar
price/perfromance point on the BNT G8124/G1000, with sFlow.

11

Anyone know what the buffer depth is on the Brocade TurboIron 24x? One
thing to keep in mind is that neither the Arista nor the Brocade
TurboIron are store and forward, they are both "cut through" switches
which means they use less buffering for a given amount of traffic.
Basically, a packet is already going out the egress interface before it
is even completely received on the ingress interface.

I have them (TI24X) in production and they work ok. They are lacking
some features of the larger switches, though. No MRP or stp-group
stuff. But they are a decent switch for the price.

George

12

From: Dave Temkin
Sent: Thursday, March 11, 2010 12:51 PM
To: Kevin Oberman
Cc: nanog@nanog.org
Subject: Re: 10GBase-t switch

Can you point to another 1U box that has more than 16MB per-port
buffer?

-Dave

Anyone know what the buffer depth is on the Brocade TurboIron 24x? One
thing to keep in mind is that neither the Arista nor the Brocade
TurboIron are store and forward, they are both "cut through" switches
which means they use less buffering for a given amount of traffic.
Basically, a packet is already going out the egress interface before it
is even completely received on the ingress interface.

Strickly speaking when mixed 1Gb/10Gb configurations are supported (as
the original poster was requesting) cut-through forwarding no-longer works.

13

sFlow will be available at the end of Q2 2010.

Bill Fenner
Arista Networks, Inc.

14

I was talking to the Brocade SE and he mentioned that TurboIron 24X will
support Full L3 including multicast routing along with advanced L2 such as stp
groups, vlan groups, MRP, ..etc