1. The AXC105 Fibre Switch Hans Nilsson hans@erix.ericsson.se

2. The access system ISPs Management This talk: the local node

3. Photos Mounted on a wall with fibres to the users Rack installation

4. The local node is basically an Ethernet Switch Network processor Assembler PowerPC Linux Erlang/OTP (35 k lines) C (10 k lines) Hardware Another story…

5. What does what Network Processor Ethernet Frames PowerPC Erlang C Linux Tables, registers SNMP Telnet SSH …

6. In Erlang: Resources Everything manageable is a resource: Ethernet Port Bandwidth limitation CPU LED Clock Alarm …

7. ELN Resource System – example of Resources User- and machine interfaces: –SNMP –CLI (Command Line Interface) over telnet –… Generic Interface Resources Generic Resources Independent of HW and function: –Error logger –Trace logger –Database –Alarm –… Models HW and the function: –Ethernet port –Network processor –Vlan –Mezzanine board –Main board –Bandwidth limitation –… Function Specific Resources

8. Hardware CPUNP NP-SWDrivers Linux NP_LIB Generic Resource System Function Specific Resources Generic Resources Generic Interface Resources Development Support SNMP Telnet/cli etc HW Dependencies Application Core Application & HW Independent Parts The Resource System HW_LIB

9. Resources The Resource System: coordinates actions performed by the different resources supervises the resources provides an API A Resource: is started by the Resource System performs actions at start-up (initiates registers, load code …) execute orders sent to the resource (set, get, reset, call, check …) Provides configuration data to the CLI (Commands)

10. Experiences Good Linux: Much available out there Many experts Erlang: High level Very short development time Network Processor Flexible Bad Linux: Not completely perfect Allergic reactions … Erlang: Nothing bad Allergic reactions … Network Processor Expensive Allergic reactions …

11. Questions ?