A text string describing the local interface associated with this
subscriber. Types/formats/examples for this string include:
ATM Virtual Circuit
atm <slot>/<port>:<vpi>.<vci>
'atm 3/0:0.100'
Ethernet
{ fastEthernet | gigabitEthernet } <slot>/<port>
'fastEthernet 3/0'
'gigabitEthernet 3/0'
Ethernet VLAN
{ fastEthernet | gigabitEthernet } <slot>/<port>:<vlanID>
'fastEthernet 3/0:1000'
'gigabitEthernet 3/0:1000'
Channelized Serial
serial <slot>/<port>:<channelSpecifier>[/<channelSpecifier>]*
'serial 3/0:4' (T1/E1)
'serial 3/0:2/4' (T3/E3)
'serial 3/0:2/1/1/4' (OC3/OC12 - channelized DS3)
'serial 3/0:2/1/1/1/4' (OC3/OC12 - virtual tributaries)
L2TP/L2F over IP
ip:<localIpAddr>:<peerIpAddr>:<localTunnelID>:<peerTunnelID>:
<localSessionID>:<peerSessionID>:<callSerialNumber>
'ip:10.10.0.1:20.20.0.2:1234:5678:9abc:def0:6789abcd'
(Note: tunnelIDs, sessionIDs, and callSerialNumber are in
hexadecimal.)
Other formats may be supported over time.