Here’s a (partial) transcript from an IRC session last night. I am in awe.
21:54:13 -!- fluter [~fluter@unaffiliated/fluter] has joined #cisco 22:01:22 <fluter> hi, can I choose any one port to be the uplink of a switch? 22:01:37 <jlgaddis> no 22:01:47 <jlgaddis> take the total number of ports, divide by 2 and add 4 22:01:52 <jlgaddis> that interface is your uplink port 22:02:24 <fluter> jlgaddis, please dont make fun, 22:03:00 <fluter> jlgaddis, the switch is L2, so I need a uplink to do routing 22:09:04 <runelind> hopefully you bought a switch with an unlink port 22:09:24 <runelind> otherwise you have to return it 22:09:24 <fluter> javelin, it has no explicit uplink, 22:09:31 <fluter> which should I use? 22:09:35 <runelind> did you try port 1? 22:09:59 <runelind> damn! 22:10:02 <runelind> did you try port 2? 22:10:43 <fluter> runelind, thats my question, which port can be used as uplink? 22:11:20 <runelind> I'm out of my league here 22:11:38 <fluter> huh? 22:12:01 <jlgaddis> ANY PORT! 22:12:29 <fluter> interface Ethernet1/20 22:12:30 <runelind> jlgaddis: not port 1, it's connected to a server. 22:12:30 <fluter> description uplink 22:12:30 <fluter> switchport trunk allowed vlan 160 22:12:43 <fluter> jlgaddis, is this ok? port 20 22:12:54 <jlgaddis> yes, ffs 22:13:46 <fluter> jlgaddis, nice 22:15:10 <GraNNy-> fluter, you're nice and all, but please go read some documents before asking us for help about simple stuff. 22:15:43 <fluter> GraNNy-, I read documents, but sometimes need confirm, 22:16:01 <runelind> did you read the one about what a switch is? 22:16:17 <GraNNy-> you didn't read the docs, otherwise you wouldn't be asking such beginner questions 22:16:51 <GraNNy-> and exactly how old is this switch if you are using an Ethernet port instead of FE or GIGE? 22:17:15 <fluter> I guess I read the wrong docs, could you give some docs that I should read? 22:17:21 <GraNNy-> www.cisco.com 22:17:36 <GraNNy-> what series of switch is it? 22:17:54 <fluter> GraNNy-, hmm, we just got this switch, its a nexus 5010 22:18:04 <jlgaddis> oh what the fuck