Since you guys are talking about it anyway I figured I would chime in and ask a question I had about the N5K.
If you just buy a new or even used 5548P does it come with the functionality to do MCT/vPC or is that an additional license (just purely for L2)? Thanks, -Drew -----Original Message----- From: cisco-nsp [mailto:[email protected]] On Behalf Of Oliver Garraux Sent: Thursday, May 16, 2013 4:54 PM To: Blake Pfankuch - Mailing List Cc: [email protected] Subject: Re: [c-nsp] Nexus 5548 Questions and experiences... 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/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
