Network Management

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

Class 8: July 27

Midterm study guide  (solutions are on Sakai)


Assignment 2:

OpenFlow match-rule priorities

Continuation with and
   TCP connections take trunk 1, 2, or 3, in sequence.

What do we do with TCP connections? setting link bandwidths 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.

4. Mininet and SNMP

We can install SNMP into the Mininet virtual machine with these two commands:
    apt-get install snmpd
    apt-get install snmp

We also have to configure /etc/snmp/snmpd.conf, but only once, on the base Mininet virtual machine. We can now start /usr/sbin/snmpd on each Mininet node, and it will share the configuration.

We can then run, eg
    snmpwalk -v 1 -c tengwar

What is this OID?

Continuation with SNMP

Read, 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