Initial commit to add the suport of the Interfaces in VRF for Nexus devices
To tune to correctly retrieve the context for the VRF
On Nexus device, you need to add the following command for each VRF:
snmp-server context <context> vrf <vrf>
* Include EdgeSwitch and update subs to support more UBNT devices
* Adjust EdgeRouter model logic to use only standard OIDs
* Comments and code cleanup
* cleanup
* Include ER Infinity
Serial numbers weren't reported for stackable Layer3::H3C devices, even
when not actually stacked. Report serial number not only if the entity
has no parent, but also if it has a parent but is of type "chassis".
This fixes#232.
Data rates up to MCS 15 (two spatial streams) at 20 MHz and 40 MHz were
defined; added MCS 16 through 23.
Decoding MCS rates at SS1 and SS2 not implemented yet.
