Each entry represents config, status and statistics info related
to an ATM VP configured. This entry augments the atmVplEntry
defined in standard ATM mib (RFC 2515). So ifIndex and VPI are the
indices to this table.
Caveats:
- Traffic stats are available per VP tunnel, only if shaping is
configured on the VP. Object 'jnxAtmVpFlags' can be used to
determine if shaping is enabled.
- When no OAM is configured, OAM config and OAM stat objects'
values are invalid (zero by default). Object 'jnxAtmVpFlags'
contains info on whether OAM is configured or not.
- For atm-1 VPs, the only valid object is jnxAtmVpFlags.