I received a shipment of several Cisco Nexus 2248TP Fabric Extenders as well as a pair of Nexus 5596UP switches. I unboxed them and took a few pictures to note how things were going. Comments for each shot follow below each one.
I’ll get into design and implementation of the Nexus gear in separate posts in upcoming weeks. I don’t have to rush these into production, so I’m hoping to work with some of my fellow engineers to put the Nexus gear through their considerable paces in a lab setting before we rack ‘em up permanently.
We ordered a Nexus bundle from Cisco that contained a 5596UP, 6 2248TP Fabric Extenders, and 48 FETs (a FET being a low-cost optical module that interconnects the 2Ks to the 5Ks or 7Ks, but isn’t good for much else). The FETs were scattered all over the box, as the plastic tray in the upper right of the shot had popped open, allowing many of the 36 FETs inside to disperse. No FETs were missing, and none of them appeared to be damaged. As the FET is like any other SFP form factor transceiver, it’s a rugged little device surrounded by metal. I’m not expecting any issues, but a simple piece of tape could have kept the plastic tray shut. One of my tweeps ran into the same issue only in his case, several of the FETs ended up missing.
The 5596UPs are deep. This is a side view of a pair of them, with a Cisco 2911 ISR G2 stacked on top for scale.
This is a close up of one of the 16 fixed port groups on a 5596UP. Note that on the top row, the SFPs are inserted in a manner you would probably consider “normal” (the card edge facing downward). However, on the bottom row, the SFPs face up.
This is a shot from the side/front of a stack of fabric extenders. I want to point out the downward sloping gap that forms an air exit point.
Here again, a shot showing the gap that allows air to exit in the front-to-back airflow design optimized for hot/cold aisle data centers.
A FET is not a regular Ethernet transceiver. It’s a low cost way to uplink a 2K. Don’t mistake this for a 10G SR optical module.
The fabric extender is not a switch. Without a 5K or 7K, it’s functionless. Think of it as a linecard in a logical chassis where a 5K or 7K is the necessary component. In this shot, I’ve got rack ears mounted to the front (the furthest away from us here), a rail guide mounted further back, and the rail floating in the guide. In production, the rail will get mounted into the cabinet, and then the FEX will get slid onto the rail, and then the front rack ears screwed into place.
Same shot as above, just the rails slid along the rail guide so that you can see which bit is floating.
The 2248TP FEXen have field-replaceable modular fans and power supplies. Here, I’ve pulled out the fan unit and sat it next to a screwdriver for scale.
Here’s the 2248TP fan unit partially seated in the chassis. On either side is a power supply. The fan unit is secured with two thumb screws.
Here is one of the power supplies from the 2248TP FEX.
Here’s a power supply from the 2248TP partially seated in the chassis. The power supplies are held in place by clips.
More to come as I get into the Nexus lab testing.