Optical transmit/receive power sensors should have a relation to an interface

[jmbredal]

NAV will automatically find and log sensors from ENTITY-MIB and ENTITY-SENSOR-MIB. This means that, at least on Cisco devices, we will log and graph transmit and receive power for each transceiver.

The only problem is that NAV only sees this as a generic sensor, and makes no relation to the corresponding interface that contains the transceiver. This information is readily available from the hierarchy of ENTITY-MIB::entPhysicalTable.

ASCII-formatted sample follows:

  |     +--Te8/1 [port]
  |     |  +--10-Gigabit Transceiver Port Container Te8/1 [container]
  |     |     +--Transceiver Te8/1 [module] (FBXXL27)
  |     |        +--Te8/1 Module Temperature Sensor [sensor]
  |     |        +--Te8/1 Supply Voltage Sensor [sensor]
  |     |        +--Te8/1 Bias Current Sensor [sensor]
  |     |        +--Te8/1 Transmit Power Sensor [sensor]
  |     |        +--Te8/1 Receive Power Sensor [sensor]

---

Imported from Launchpad using lp2gh.

• date created: 2015-09-16T12:46:47Z
• owner: mbrekkevold
• the launchpad url was https://bugs.launchpad.net/bugs/1496379

[jmbredal]

Related to #1232