Initial version of this MIB module.
Throughout this document phy is used as an abbreviation
for Physical Interface. In particular it refers to a
physical ATM jack on a Catalyst 5000 ATM card. This card
can be fitted with either one or two physical jacks, only
one of which may be active at any given moment. The second
phy serves as a redundant connector to the ATM backbone.
Note, however, that for logistical reasons, each phy has
a separate ifIndex.
Support of the phy by ifTable
The dual phy entity on the c5K ATM line card is managed
using the ifTable. Specific interpretations of ifTable
for the dual phy entity are as follows.
Object Use for dual phy entity
ifIndex Each phy entity is represented by an ifEntry.
ifDescr Description of the phy entity.
ifType The value for the phy entity is other(1).
ifSpeed See .
ifPhysAddress An octet string of zero length, per .
ifAdminStatus See .
ifOperStatus See . In addition, note that a phy can
be in the up state but still not be the
active phy. However, the active phy will
always be up.
ifLastChange See .
ifName See .
ifHighSpeed See .
 McCloghrie, K. and F. Kastenholz, Evolution of the
Interfaces Group of MIB-II, RFC 1573, Hughes LAN Systems,
FTP Software, January 1994.