This file is indexed.

/lib/udev/rules.d/73-special-net-names.rules is in udev 232-25+deb9u8.

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# On Dell PowerEdge systems, the iDRAC7 and later support a USB Virtual NIC
#   which terminates in the iDRAC. Help identify this with 'idrac'
ACTION=="add", SUBSYSTEM=="net", SUBSYSTEMS=="usb", ATTRS{idVendor}=="413c", ATTRS{idProduct}=="a102", NAME="idrac"

# On IBM systems the Integrated Management Module is reachable using a
# # USB Virtual NIC.
ACTION=="add", SUBSYSTEM=="net", SUBSYSTEMS=="usb", \
   ATTRS{idVendor}=="04b3", ATTRS{idProduct}=="0325", NAME="ibmimm"

# ibmveth devices' $DEVPATH number is tied to (virtual) hardware (slot id
# selected in the HMC), thus this provides a reliable naming (e. g.
# "/devices/vio/30000002/net/eth1"); we ignore the bus number, as
# there should only ever be one bus, and then remove leading zeros
ACTION=="add", SUBSYSTEM=="net", NAME=="", DRIVERS=="ibmveth", PROGRAM="/bin/sh -ec 'D=${DEVPATH#*/vio/}; D=${D%%%%/*}; D=${D#????}; D=${D#0}; D=${D#0}; D=${D#0}; D=${D#0}; echo ${D:-0}'", NAME="ibmveth$result"