Berkeley COMPSCI 268 - A Scalable Ethernet Architecture for Large Enterprises (57 pages)

Previewing pages 1, 2, 3, 4, 26, 27, 28, 54, 55, 56, 57 of 57 page document View the full content.
View Full Document

A Scalable Ethernet Architecture for Large Enterprises



Previewing pages 1, 2, 3, 4, 26, 27, 28, 54, 55, 56, 57 of actual document.

View the full content.
View Full Document
View Full Document

A Scalable Ethernet Architecture for Large Enterprises

50 views

Lecture Notes


Pages:
57
School:
University of California, Berkeley
Course:
Compsci 268 - Computer Networks
Computer Networks Documents

Unformatted text preview:

Floodless in SEATTLE A Scalable Ethernet Architecture for Large Enterprises Chang Kim and Jennifer Rexford http www cs princeton edu chkim Princeton University Goals of Today s Lecture Reviewing Ethernet bridging Lec 10 11 Flat addressing and plug and play networking Flooding broadcasting and spanning tree VLANs New challenges to Ethernet Control plane scalability Avoiding flooding and reducing routing protocol overhead Data plane efficiency Enabling shortest path forwarding and load balancing SEATTLE as a solution Amalgamation of various networking technologies covered so far E g link state routing name resolution encapsulation DHT etc 2 Quick Review of Ethernet Ethernet Dominant wired LAN technology Covers the first IP hop in most enterprises campuses First widely used LAN technology Simpler cheaper than token LANs ATM and IP Kept up with speed race 10 Mbps 10 Gbps Metcalfe s Ethernet sketch 4 Ethernet Frame Structure Addresses source and destination MAC addresses Flat globally unique and permanent 48 bit value Adaptor passes frame to network level protocol If destination address matches the adaptor Or the destination address is the broadcast address Otherwise adapter discards frame Type indicates the higher layer protocol Usually IP 5 Ethernet Bridging Routing at L2 Routing determines paths to destinations through which traffic is forwarded Routing takes place at any layer including L2 where devices are reachable across multiple hops App Layer P2P or CDN routing Lec 18 Overlay routing Lec 17 IP Layer IP routing Lec 13 15 Link Layer Ethernet bridging Lec 10 11 6 Ethernet Bridges Self learn Host Info Bridges switches forward frames selectively Forward frames only on segments that need them Switch table Maps destination MAC address to outgoing interface Goal construct the switch table automatically B A C switch D 7 Self Learning Building the Table When a frame arrives Inspect the source MAC address Associate Store Use the address with the incoming interface the



View Full Document

Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view A Scalable Ethernet Architecture for Large Enterprises and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view A Scalable Ethernet Architecture for Large Enterprises and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?