I was having a discussion today about Global IP networks from AT&T, WorldCom, etc that are moving to the "IP+Optical" standard. From what I understand it fiber optic cable, MPLS and IP (OSPF, BGP, etc).
My question is what is the Layer 2 technology? I may be thinking of this from a TDM world (I work on several enterprise networks), but if it's not Ethernet everywhere (they're getting there), what is the Layer 2 technology the breaks the packets into frames and frames the 1's and 0's from the fiber network ?
I've read about RPR and DPT. Are these the Layer2 encapsulation used?
RPR and SRP (formerly called DPT) are Layer 2 MAC encapsulation protocols providing multiple access over Sonet. They virtually emulate a LAN environment.
On point-to-point Sonet links the choice of Layer 2 encapsulation is HDLC, PPP, Frame Relay. ATM is a special case, not fitting in the OSI layered model. ATM can also be a transport over Sonet, which is always Layer 1.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...