Twinax-wise we've had a few issues with active twinax cables. The NIC's on some storage hosts (Isilon IIRC) didn't work well with active twinax cables. We've used Panduit passive twinax cables w/o issue. I think Panduit sells up to a 7m passive cable, whereas Cisco only sells passive up to 5m.
Also - there are some restrictions on ISSU on the 5k that might bite you. I think as someone already mentioned it doesn't do ISSU if you're using L3. Personally I'd try to avoid doing L3 on a N5k if possible. Oliver ------------------------------------- Oliver Garraux Check out my blog: blog.garraux.net Follow me on Twitter: twitter.com/olivergarraux On Thu, May 16, 2013 at 4:34 PM, Blake Pfankuch - Mailing List < [email protected]> wrote: > Scott, > Great question on the Layer 3. This literally a Layer 2 > DR network with a /21 internally for a small subset of our primary > datacenter. Very limited Layer 3 (4 /28's or smaller totaling 11 devices), > which is all handled by our HA firewall and inter-datacenter WAN Routers > (through the firewall). Firewall is 10gbit, and will handle that traffic > without a problem. This is a 3 rack environment currently holding a 4900M > and a 3560G. I need 4 ports of 10gbit SR, 10 ports of non-overcommitted > 10gbase-t and 40 ports of 1gbase-t. Storage lives on its own dedicated > fabric (for now) and will not be on Nexus for a number of years. Next year > I will add a second 5548UP and properly multihome the FEX and HA firewalls. > The only reason this environment is going Nexus is due to space > constraints (colo) and the need for 10gbit fiber, copper and CX1, otherwise > the existing 4900M or a small 4500E would have been perfectly fine. > > Vendor bit us on this one as they don't know how to pick a standard... > The moral of the story is, never let your DBA team purchase their own > equipment. Also don't listen to Oracle sales monkeys. They lie. > > I did know about the BPDU guard implementation on the N2k devices. I do > have a question regarding other types of links... Any experience with > routers? I have a pretty big handful of T1/MPLS/DS3/OC3/Voice routers > ranging from 1700 to 7206 which I was thinking might have to go into a non > n2k platform when we do our primary datacenter next year. Do these devices > that do not speak spanning tree function as expected on the 2k's? > > What about Routed interfaces? I have 2 (soon to be 3) WAN links that are > terminated within our primary datacenter 6509's as routed interfaces. I am > assuming that they need to be on a non n2k platform as well? > > Thanks, > Blake > > From: Scott Voll [mailto:[email protected]] > Sent: Thursday, May 16, 2013 11:58 AM > To: Blake Pfankuch - Mailing List > Cc: [email protected] > Subject: Re: [c-nsp] Nexus 5548 Questions and experiences... > > We have just started our move from a 4506E to a set of 5548's. NXOS is a > little different from IOS. Learn the vPC, and such will be a good thing. > as someone already stated, having one is not the best design. With all > the 10 Gig stuff running, what are you going to use for layer 3? > > we went with the 5548's, but there are some design considerations to be > made. my understanding is you can't do a Non interrupting upgrade. Was > not my plan originally, and makes upgrades more of a problem (especailly > with Storage running through them also), thus I'm back to what ever you > install will be on it until we by new hardware. Thus we went with the 5.2 > flavor, having been burned on .0 stuff way to often. > > we have a Cisco Blade chassis with multiple blades. very happy with the > TwinAX cables. So long as you get the right sizes. I don't like looping > them a bunch. But it's hard to order before you get them in, with out > knowing were everything will be racked. > > also another note, you will not want to place any IOS switches hanging off > the 2k's. They don't support Spanning tree and will error disable your > port. Wish I would have known that before buying a 5548. Might have went > bigger. > > YMMV > > Scott > > On Thu, May 16, 2013 at 7:35 AM, Blake Pfankuch - Mailing List < > [email protected]<mailto:[email protected]>> > wrote: > Within the next week I will be starting my first dive into Nexus. I have > read the Cisco Press book for nexus, however its primarily focused on 4.x > not 5.x and 6.x. > > I am looking for some real world feedback, including some of the gotchas > people have found in existing deployments. Really this will be a small > deployment, a single 5548 for now and a couple 2232TM-E and 2224TP for > fabric extenders. What has been the experience using TwinAX cables to > uplink to servers? Cisco Twinax cables working only or have people been > able to use HP/Sun/Dell provided cables with luck? What's the experience > with the Nexus B22 blade chassis FEX? > > OS suggestions? Again this is going to be a new deployment, and its going > into an environment that is not upgraded heavily. As an example I have > moved some devices off 12.2 (20) or earlier in the past few weeks. > > Thanks, > > Blake > _______________________________________________ > cisco-nsp mailing list [email protected]<mailto: > [email protected]> > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
