Network Management

Summer 2017, Corboy 205, TTh 5:30-8:45 pm

Class 7: July 25




Midterm study guide  (solutions are on Sakai)

Readings




Midterm news

There are two broad approaches to eliminating loops in a network:

We already saw the second approach in switchring.py


Interconnection fabric: intronetworks.cs.luc.edu/current/html/ethernet.html#openflow-switches.
 
3. Continuation with trunkNK.py and multitrunkpox.py
   TCP connections take trunk 1, 2, or 3, in sequence.

trunkNK.py: setting link bandwidths
multitrunkpox.py: assign new TCP connections to one of the trunks, in round-robin fashion via picktrunk().
Note that this requires matching on the IP addresses and TCP ports, as well as the Ethernet addresses.





Continuation with SNMP

Read intronetworks.cs.luc.edu/current/html/netmgmt.html, sections 21.1-21.11

   
Other ways of polling devices:

    ssh: limitations: lack of "universal" account
              lack of "limited" account
              doesn't work for most hubs/switches/non-hosts