[c-nsp] Nexus 2000 vs Catalyst 4948 for access layer

[Manu Chao]

No

AFAIK vPC is already available on N5K/N2K, active/active with FEX should
be possible:

 Cisco Nexus 5000 NX-OS Software Rel 4.1(3)N2(1)

"A virtual port channel (vPC) allows links that are physically connected to
two different Cisco Nexus 5000 Series switches or Cisco Nexus 2000 Series
Fabric Extenders to appear as a single port channel by a third device (see
the following figure). The third device can be a switch, server, or any
other networking device. Beginning with Cisco NX-OS Release 4.1(3)N1(1), you
can configure vPCs in topologies that include Cisco Nexus 5000
Seriesswitches connected to the Fabric
Extender. A vPC can provide multipathing, which allows you to create
redundancy by enabling multiple parallel paths between nodes and load
balancing traffic where alternative paths exist"

R/
Manu

On Sat, Jan 30, 2010 at 12:56 AM, scott owens <scottowens12 at gmail.com>wrote:

> >
> >   1. Re: Nexus 2000 vs Catalyst 4948 for access layer
> >      (chris at lavin-llc.com)
> > --------------------------------------------------------------------
> >
> > Message: 1
> > Date: Fri, 29 Jan 2010 14:16:59 -0500
> > From: chris at lavin-llc.com
> > To: "Nick Hilliard" <nick at inex.ie>
> > Cc: cisco-nsp at puck.nether.net
> > Subject: Re: [c-nsp] Nexus 2000 vs Catalyst 4948 for access layer
> > Message-ID:
> >        <c322407a5ca5c76b043fa62c4bee5476.squirrel at email.fatcow.com>
> > Content-Type: text/plain;charset=iso-8859-1
> >
> > > wrt NX-OS vs. IOS, they are two different systems.  NX-OS is very young
> > in
> > > its development cycle; IOS is much more mature and has many more
> > features.
> > >
> > > Nick
> >
> >
> > I'm curious why you suggest that the NX-OS is very young. My
> understanding
> > (I'm not a SAN guy) is that the NX-OS is just a move of bringing the MDS
> > OS into a routing/switching combination with IOS.
> >
> > I had the recent experience of a Nexus CPOC down in RTP. Going into it I
> > was apprehensive about learning a new OS. But through the CPOC I learned
> > that it's not that much different from IOS. Seemed like they did a decent
> > job of importing/aliasing the IOS related commands. I didn't feel as lost
> > within the CLI as I had expected.
> >
> > -chris
> >
>
>
> We have about a dozen 2148Ts connected to 4 Nexus 5Ks and a couple of 7Ks
>
> I would absolutely NOT pick the 2148Ts for just switching unless you had
> some larger data center needs; they and their "parent" 5Ks don't route ..
> .so we do some ( and we wanted to) vlan tagging on servers to bypass
> routing.
>
> I will say that "show log last 20" is worth every penny :)
>
> They are stable if you hook them up right - currently you can not do
> active/active with a FEX connected to multiple 5Ks & do LACP teaming to
> servers.
>
> Got question  - shoot them on over ...
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