# Interface Types and Specifiers

Many commands take the variables interfaceType and interfaceSpecifier. Some commands support all types of interfaces, whereas other commands support only certain types of interfaces. Similarly, some commands support all interface specifier formats for a particular interface type, whereas other commands support only certain interface specifier formats.

Table 3 lists the interface specifiers for each type of interface on ERX7xx models, ERX14xx models, and the Juniper Networks ERX310 Broadband Services Router.

| Note: On ERX7xx models, ERX14xx models, and the ERX310 router, you can use the atm slot/port/vpi/vci interface specifier format as an alternative to the atm slot/port.subinterface format with the specific show interface and show subinterface commands to monitor all ATM 1483 subinterfaces (except NBMA interfaces) as well as the upper-layer interfaces configured over an ATM 1483 subinterface. You cannot, however, use the atm slot/port/vpi/vci format to create or modify an ATM 1483 subinterface.

Table 4 lists the interface specifiers for each type of interface on the Juniper Networks E120 and E320 Broadband Services Routers.

| Note: On the E120 router and the E320 router you can use the atm slot/adapter/port/vpi/vci interface specifier format as an alternative to the atm slot/adapter/port.subinterface format with the specific show interface and show subinterface commands to monitor all ATM 1483 subinterfaces (except NBMA interfaces) as well as the upper-layer interfaces configured over an ATM 1483 subinterface. You cannot, however, use the atm slot/adapter/port/vpi/vci format to create or modify an ATM 1483 subinterface.

Table 3: Interface Types and Specifiers for ERX7xx Models, ERX14xx Models, and ERX310 Router

Interface Type | Description | Interface Specifier | Example
--- | --- | --- | ---
atm | ATM interface or ATM 1483 subinterface | Refer to the individual formats listed below.
ATM interface or subinterface |  | To configure an ATM interface or subinterface: slot/port[.subinterface ] slot—Number of the chassis slot in the range 0–6 (ERX7xx models), 0–13 (ERX14xx models), and 0–2 (ERX310 router) port—Port number on the I/O module subinterface—Number of the subinterface in the range 1–2147483647 | atm 3/2.6
ATM 1483 subinterface |  | To display information about an ATM 1483 subinterface by using show commands: slot/port/vpi/vci slot—Number of the chassis slot in the range 0–6 (ERX7xx models), 0–13 (ERX14xx models), and 0–2 (ERX310 router) port—Port number on the I/O module vpi—Virtual path identifier of the PVC on this ATM 1483 subinterface; allowable numeric range depends on the module capabilities and current configuration vci—Virtual circuit identifier of the PVC on this ATM 1483 subinterface; allowable numeric range depends on the module capabilities and current configuration | atm 3/2/1/2
fastEthernet | IEEE 802.3 Fast Ethernet (FE) interface | slot/port[.subinterface1[.subinterface2 ] ] slot—Number of the chassis slot in the range 0–6 (ERX7xx models), 0–13 (ERX14xx models), and 0–2 (ERX310 router) port—Port number on the I/O module or port 0 for the Fast Ethernet management port on the SRP I/O module The meaning of the subinterface variables depends on the configuration context. You can configure Fast Ethernet interfaces with or without VLANS. VLANs: subinterface1—Number of the VLAN subinterface in the range 1–2147483647; no more than 4096 VLAN subinterfaces per Fast Ethernet physical port subinterface2—When using PPPoE, the number of the PPPoE subinterface in the range 1–2147483647; no more than 8000 PPPoE subinterfaces per Fast Ethernet line module No VLANs: subinterface1—When using PPPoE, the number of the PPPoE subinterface in the range 1–2147483647; no more than 8000 PPPoE subinterfaces per Fast Ethernet line module subinterface2—Not used | fastEthernet 3/2.6.20
gigabitEthernet | IEEE 802.3 Gigabit Ethernet (GE) interface | slot/port[.subinterface1[.subinterface2 ] ] slot—Number of the chassis slot in the range 0–6 (ERX7xx models), 0–13 (ERX14xx models), and 0–2 (ERX310 router) port—Port number on the I/O module The meaning of the subinterface variables depends on the configuration context. You can configure Gigabit Ethernet interfaces with or without VLANs. VLANs: subinterface1—Number of the VLAN subinterface in the range 1–2147483647; no more than 4096 VLAN subinterfaces per Gigabit Ethernet physical port subinterface2—When using PPPoE, the number of the PPPoE subinterface in the range 1–2147483647; no more than 8000 PPPoE subinterfaces per Gigabit Ethernet line module No VLANs: subinterface1—When using PPPoE, the number of the PPPoE subinterface in the range 1–2147483647; no more than 8000 PPPoE subinterfaces per Gigabit Ethernet line module subinterface2—Not used | gigabitEthernet 3/0.6.20
lag | IEEE 802.3ad link aggregation group (LAG) interface | bundle-name[.subinterface ] bundle-name—Name of the bundle subinterface—Number of the LAG subinterface in the range 1–2147483647 | lag paris.2
loopback | Loopback interface | integer integer—Integer in the range 1–4294967293 | loopback 20
mlframe-relay | Multilink frame relay interface | bundle-name[.subinterface ] bundle-name—Name of the bundle subinterface—Number of the MLFR subinterface in the range 1–4294967293 | mlframe-relay boston.1
mlppp | Multilink PPP interface | bundle-name bundle-name—Name of the bundle | mlppp chicago
mplsL2shim | MPLS shim interface | slot/port[.subinterface ] slot—Number of the chassis slot in the range 0–6 (ERX7xx models), 0–13 (ERX14xx models), and 0–2 (ERX310 router) port—Port number on the I/O module subinterface—Number of the subinterface in the range 1–2147483647 | mplsL2shim 3/2.1
mplsMajor | MPLS major interface | slot/port[.subinterface ] slot—Number of the chassis slot in the range 0–6 (ERX7xx models), 0–13 (ERX14xx models), and 0–2 (ERX310 router) port—Port number on the I/O module subinterface—Number of the subinterface in the range 1–2147483647 | mplsMajor 3/2.1
mplsMinor | MPLS minor interface | [ vr:]tunnel-name vr—Name of a virtual router tunnel-name—Name of the tunnel | mplsMinor lsp-02020202-1-4
null | Null interface, which acts as a data sink and cannot forward or receive traffic. You cannot configure values on the null interface. | 0 | null 0
pos | Packet over SONET (POS) interface | slot/port[.subinterface ] slot—Number of the chassis slot in the range 0–6 (ERX7xx models), 0–13 (ERX14xx models), and 0–2 (ERX310 router) port—Port number on the I/O module subinterface—Number of the subinterface in the range 1–2147483647 | pos 3/2
serial | CT3, E3 Frame, T3 Frame, or cOCx/STMx interface | Refer to the individual formats listed below.
CT3 |  | slot/port:channel/subchannel[.subinterface ] slot—Number of the chassis slot in the range 0–6 (ERX7xx models) and 0–13 (ERX14xx models) port—Port number on the I/O module channel—Number of a T1 channel on a CT3 module; in the range 1–28 subchannel—Number of the channel group associated with a range of DS0 timeslots on a CT3 module; in the range 1–28 subinterface—Number of the subinterface in the range 1–2147483647 | serial 3/2:20/15
E3/T3 Frame |  | slot/port[.subinterface ] slot—Number of the chassis slot in the range 0–6 (ERX7xx models) and 0–13 (ERX14xx models) port—Port number on the I/O module subinterface—Number of the subinterface in the range 1–2147483647 | serial 3/2
cOCx/STMx: unframed E1 |  | slot/port:path-channel/path-payload/ tributary-group/tributary-number/ channelNumber[.subinterface ] slot—Number of the chassis slot in the range 0–6 (ERX7xx models), 0–13 (ERX14xx models), and 0–2 (ERX310 router) port—Port number on the I/O module path-channel—Number of the STS-1or STM-0 line in the range 1–2147483648 path-payload—Number of the payload within the path tributary-group—Number of the tributary group within the path tributary-number—Number of the tributary within the group channelNumber—1 (the router assigns the number one to an unframed E1 channel) subinterface—Number of the subinterface in the range 1–2147483647 | serial 3/0:10/1/2/2/1
cOCx/STMx: fractional E1/T1 |  | slot/port:path-channel/path-payload/ tributary-group/tributary-number/ channel-group[.subinterface ] slot—Number of the chassis slot in the range 0–6 (ERX7xx models), 0–13 (ERX14xx models), and 0–2 (ERX310 router) port—Port number on the I/O module path-channel—Number of the STS-1or STM-0 line in the range 1–2147483648 path-payload—Number of the payload within the path tributary-group—Number of the tributary group within the path tributary-number—Number of the tributary within the group channel-group—Number of a fractional T1 or E1 line subinterface—Number of the subinterface in the range 1–2147483647 | serial 3/0:10/1/2/2/1
cOCx/STMx: unchannelized DS3 |  | slot/port:path-channel/ds3-channel-number [.subinterface ] slot—Number of the chassis slot in the range 0–6 (ERX7xx models), 0–13 (ERX14xx models), and 0–2 (ERX310 router) port—Port number on the I/O module path-channel—Number of the STS-1or STM-0 line in the range 1–2147483648 ds3-channel-number—Number of a T3 channel subinterface—Number of the subinterface in the range 1–2147483647 | serial 3/0:1/1
cOCx/STMx: DS3 channelized to DS0 |  | slot/port:path-channel/ds3-channel-number/ ds1-channel-number/subchannel-number [.subinterface ] slot—Number of the chassis slot in the range 0–6 (ERX7xx models), 0–13 (ERX14xx models), and 0–2 (ERX310 router) port—Port number on the I/O module path-channel—Number of the STS-1or STM-0 line in the range 1–2147483648 ds3-channel-number—Number of a T3 channel ds1-channel-number—Number of a T1 channel subchannel-number—Number of a fractional T1 channel subinterface—Number of the subinterface in the range 1–2147483647 | serial 3/0:1/1/10/15
sonet – line layer | Line layer of a SONET/SDH interface | slot/port slot—Number of the chassis slot in the range 0–6 (ERX7xx models), 0–13 (ERX14xx models), and 0–2 (ERX310 router) port—Port number on the I/O module | sonet 3/0
sonet – path layer | Path layer of a SONET/SDH interface | slot/port:path-channel slot—Number of the chassis slot in the range 0–6 (ERX7xx models), 0–13 (ERX14xx models), and 0–2 (ERX310 router) port—Port number on the I/O module path-channel—Number of the STS-1or STM-0 line in the range 1–2147483648 | sonet 3/0:2
sonet – section layer | Section layer of a SONET/SDH interface | slot/port slot—Number of the chassis slot in the range 0–6 (ERX7xx models), 0–13 (ERX14xx models), and 0–2 (ERX310 router) port—Port number on the I/O module | sonet 3/0
tunnel | Tunnel interface | tunnel-type:tunnel-name[.subinterface ] tunnel-type—Type of the tunnel: dvmrp, gre, ipsec, l2tp, or mpls tunnel-name—Name of the tunnel subinterface—For GRE tunnels, number of the subinterface in the range 1–2147483647 | tunnel gre:boston

Table 4: Interface Types and Specifiers for E120 Router and E320 Router

Interface Type | Description | Interface Specifier | Example
--- | --- | --- | ---
atm | ATM interface or ATM 1483 subinterface | Refer to the individual formats listed below.
ATM interface or subinterface |  | To configure an ATM interface or subinterface: slot/adapter/port[.subinterface ] slot—Number of the chassis slot in the range 0–5 (E120 router) and 0–5 or 11–16 (E320 router) adapter—Identifier for the IOA within the chassis slot, either 0 or 1, where: 0 indicates that the IOA is installed in the right IOA bay (E120 router) or the upper IOA bay (E320 router). 1 indicates that the IOA is installed in the left IOA bay (E120 router) or the lower IOA bay (E320 router). port—Port number on the IOA subinterface—Number of the subinterface in the range 1–2147483647 | atm 3/1/7.6
ATM 1483 subinterface |  | To display information about an ATM 1483 subinterface by using show commands: slot/adapter/port/vpi/vci slot—Number of the chassis slot in the range 0–5 (E120 router) and 0–5 or 11–16 (E320 router) adapter—Identifier for the IOA within the chassis slot, either 0 or 1, where: 0 indicates that the IOA is installed in the right IOA bay (E120 router) or the upper IOA bay (E320 router). 1 indicates that the IOA is installed in the left IOA bay (E120 router) or the lower IOA bay (E320 router). port—Port number on the IOA vpi—Virtual path identifier of the PVC on this ATM 1483 subinterface; numeric range for the E120 and E320 routers is 0–255 vci—Virtual circuit identifier of the PVC on this ATM 1483 subinterface; numeric range for the E120 and E320 routers is 1–65535 | atm 3/1/7/1/2
fastEthernet (for Fast Ethernet management port on SRP IOA) | IEEE 802.3 Fast Ethernet (FE) interface | slot/adapter/port slot—Number of the chassis slot, either 6 or 7 adapter—Identifier for the SRP I/O adapter (IOA) within the chassis slot; always 0 port—Port number on the SRP IOA; always 0 | fastEthernet 6/0/0
gigabitEthernet | IEEE 802.3 Gigabit Ethernet (GE) interface | slot/adapter/port[.subinterface1[.subinterface2 ] ] slot—Number of the chassis slot in the range 0–5 (E120 router) and 0–5 or 11–16 (E320 router) adapter—Identifier for the IOA within the chassis slot, either 0 or 1, where: 0 indicates that the IOA is installed in the right IOA bay (E120 router) or the upper IOA bay (E320 router). 1 indicates that the IOA is installed in the left IOA bay (E120 router) or the lower IOA bay (E320 router). port—Port number on the IOA The meaning of the subinterface variables depends on the configuration context. You can configure Gigabit Ethernet interfaces with or without VLANs. VLANs: subinterface1—Number of the VLAN subinterface in the range 1–2147483647; no more than 4096 VLAN subinterfaces per Gigabit Ethernet physical port subinterface2—When using PPPoE, the number of the PPPoE subinterface in the range 1–2147483647; no more than 16,000 PPPoE subinterfaces per Gigabit Ethernet line module No VLANs: subinterface1—When using PPPoE, the number of the PPPoE subinterface in the range 1–2147483647; no more than 16,000 PPPoE subinterfaces per Gigabit Ethernet line module subinterface2—Not used | gigabitEthernet 4/0/1.20
lag | IEEE 802.3ad link aggregation group (LAG) interface | bundle-name[.subinterface ] bundle-name—Name of the bundle subinterface—Number of the LAG subinterface in the range 1–2147483647 | lag paris.2
mplsL2shim | MPLS shim interface | slot/adapter/port[.subinterface ] slot—Number of the chassis slot in the range 0–5 (E120 router) and 0–5 or 11–16 (E320 router) adapter—Identifier for the IOA within the chassis slot, either 0 or 1, where: 0 indicates that the IOA is installed in the right IOA bay (E120 router) or the upper IOA bay (E320 router). 1 indicates that the IOA is installed in the left IOA bay (E120 router) or the lower IOA bay (E320 router). port—Port number on the IOA subinterface—Number of the subinterface in the range 1–2147483647 | mplsL2shim 3/0/2.1
mplsMajor | MPLS major interface | slot/adapter/port[.subinterface ] slot—Number of the chassis slot in the range 0–5 (E120 router) and 0–5 or 11–16 (E320 router) adapter—Identifier for the IOA within the chassis slot, either 0 or 1, where: 0 indicates that the IOA is installed in the right IOA bay (E120 router) or the upper IOA bay (E320 router). 1 indicates that the IOA is installed in the left IOA bay (E120 router) or the lower IOA bay (E320 router). port—Port number on the IOA subinterface—Number of the subinterface in the range 1–2147483647 | mplsMajor 3/0/2.1
mplsMinor | MPLS minor interface | [ vr:]tunnel-name vr—Name of a virtual router tunnel-name—Name of the tunnel | mplsMinor lsp-02020202-1-4
pos | Packet over SONET (POS) interface | slot/adapter/port slot—Number of the chassis slot in the range 0–5 (E120 router) and 0–5 or 11–16 (E320 router) adapter—Identifier for the IOA within the chassis slot, either 0 or 1, where: 0 indicates that the IOA is installed in the right IOA bay (E120 router) or the upper IOA bay (E320 router). 1 indicates that the IOA is installed in the left IOA bay (E120 router) or the lower IOA bay (E320 router). port—Port number on the IOA | pos 5/0/0
sonet – line layer | Line layer of a SONET/SDH interface | slot/adapter/port slot—Number of the chassis slot in the range 0–5 (E120 router) and 0–5 or 11–16 (E320 router) adapter—Identifier for the IOA within the chassis slot, either 0 or 1, where: 0 indicates that the IOA is installed in the right IOA bay (E120 router) or the upper IOA bay (E320 router). 1 indicates that the IOA is installed in the left IOA bay (E120 router) or the lower IOA bay (E320 router). port—Port number on the IOA | sonet 3/0/0
sonet – path layer | Path layer of a SONET/SDH interface | slot/adapter/port slot—Number of the chassis slot in the range 0–5 (E120 router) and 0–5 or 11–16 (E320 router) adapter—Identifier for the IOA within the chassis slot, either 0 or 1, where: 0 indicates that the IOA is installed in the right IOA bay (E120 router) or the upper IOA bay (E320 router). 1 indicates that the IOA is installed in the left IOA bay (E120 router) or the lower IOA bay (E320 router). port—Port number on the IOA | sonet 3/0/0
sonet – section layer | Section layer of a SONET/SDH interface | slot/adapter/port slot—Number of the chassis slot in the range 0–5 (E120 router) and 0–5 or 11–16 (E320 router) adapter—Identifier for the IOA within the chassis slot, either 0 or 1, where: 0 indicates that the IOA is installed in the right IOA bay (E120 router) or the upper IOA bay (E320 router). 1 indicates that the IOA is installed in the left IOA bay (E120 router) or the lower IOA bay (E320 router). port—Port number on the IOA | sonet 3/0/0
tenGigabitEthernet | IEEE 802.3ae 10-Gigabit Ethernet (GE) interface | slot/adapter/port[.subinterface1[.subinterface2 ] ] slot—Number of the chassis slot in the range 0–5 (E120 router) and 0–5 or 11–16 (E320 router) adapter—Identifier for the IOA within the chassis slot. 0 indicates that this a full-height IOA. port—Port number on the IOA The meaning of the subinterface variables depends on the configuration context. You can configure 10-Gigabit Ethernet interfaces with or without VLANs. VLANs: subinterface1—Number of the VLAN subinterface in the range 1–2147483647; no more than 4096 VLAN subinterfaces per 10-Gigabit Ethernet physical port subinterface2—When using PPPoE, the number of the PPPoE subinterface in the range 1–2147483647; no more than 16,000 PPPoE subinterfaces per 10-Gigabit Ethernet line module No VLANs: subinterface1—When using PPPoE, the number of the PPPoE subinterface in the range 1–2147483647; no more than 16,000 PPPoE subinterfaces per 10-Gigabit Ethernet line module subinterface2—Not used | tenGigabitEthernet 4/0/1.20
tunnel | Tunnel interface | tunnel-type:tunnel-name[.subinterface] tunnel-type—Type of the tunnel: dvmrp, gre, l2tp, or mpls tunnel-name—Name of the tunnel subinterface—For GRE tunnels, number of the subinterface in the range 1–2147483647 | tunnel gre:boston