BRKCRS-3900: NBase-T and the Evolution of Ethernet
Presenters: Dave Zacks, Distinguished Engineer; Peter Zones, Principle Engineer
History has been: 10x performnce increase at 3x the cost. 40Gb broke that model –> 100Gb PHYs were very expensive; industry needed/wanted an intermediate step.
Ethernet has a really strong roadmap and will continue to evolve for a very long time. Roadmap: http://www.ethernetalliance.org/roadmap/
- 25Gb – direct server connect (Twinax)
- 40GBase-T (Cat 8 cable!)
- 2.5/5G – N-BaseT
- 400Gb
- More
SERDES
- Serializer/deserializer
- Turns bits on the wire into bytes and vise-versa
- 40Gb Ethernet based on 4x10Gb SERDES
100m is the sweet spot for copper cable lengths. Why? CSMA/CD and also electrical wiring, placement of wiring closets just make 100m the right fit.
Cisco Mgig
- PoE/PoE+/UPoE
- Standards compliant
- Investment protection (existing cable plant)
- Supports 100M but not 10M; (had to drop something as far as standards and nobody uses 10M anymore really)
802.11ac Wave 2
- Max PHY rate: 6.8Gbps (in absolute best conditions)
- More likely 3-ish Gb/s
- Point: it’s more than 1Gbs
Cisco Mgig products:
- 4500E line card
- New 3850 models with Mgig ports
- New compact 3560CX with 2x Mgig ports
Between 2003 and 2014, approx 70 billion meters of Cat 5e and Cat 6 cabling were sold