Description Maps to the RADIUS attribute TunnelMediumType (RFC 2868).
Specifies the transport medium to use when creating a tunnel for those protocols (such as, L2TP) that can operate over multiple transports. It can be part of the access-request and the access-accept packets.
Possible values are:
1 Ipv4 (IP version 4)
2 Ipv6 (IP version 6)

Note: The E-series router supports Ipv4 only.
Object identifier
Attribute syntax Integer
Equality matching rule Integer Match
Multivalued False