Understanding Interface Naming Conventions on EX Series Switches
Juniper Networks EX Series Ethernet Switches use a naming convention for defining the interfaces that is similar to that of other platforms running under Juniper Networks Junos operating system (Junos OS). This topic provides brief information on the naming conventions used for interfaces on EX Series switches. For additional information, see the Junos OS Network Interfaces Configuration Guide at http://www.juniper.net/techpubs/software/junos/index.html.
This topic describes:
Physical Part of an Interface Name
Interfaces in Junos OS are specified as follows:
type-fpc / pic / port
EX Series switches apply this convention as follows:
- type—EX Series interfaces use
the following media types:
- ge—Gigabit Ethernet interface
- xe—10 Gigabit Ethernet interface
- fe—Fast Ethernet interface
- fpc—Flexible PIC Concentrator.
EX Series interfaces use the following convention for the FPC number
in interface names:
- On EX2200 switches, EX3200 switches, EX4200 standalone switches, or EX4500 switches, FPC refers to the switch itself. The FPC number is always 0 on these switches.
- On EX4200 switches configured in a Virtual Chassis, the FPC number indicates the member ID of the switch within the Virtual Chassis, from 0 through 9.
- On EX8200 switches, the FPC number indicates the slot number of the line card that contains the physical interface.
- pic—EX Series interfaces use
the following convention for the PIC (Physical Interface Card) number
in interface names:
- On EX2200, EX3200, EX4200, and EX4500 switches, the PIC number is 0 for all built-in interfaces (interfaces that are not an uplink port).
- On EX2200, EX3200, and EX4200 switches, the PIC number is 1 for uplink ports.
- On EX4500 switches, the PIC number is 1 for uplink ports on the left-hand uplink module and 2 for uplink ports on right-hand uplink module.
- On EX8200 switches, the PIC number is always 0.
- port—EX Series interfaces use
the following convention for port numbers:
- On EX2200, EX3200, EX4200, and EX4500 switches, built-in network ports are numbered from left to right. On models that have two rows of ports, the ports on the top row start with 0 followed by the remaining even-numbered ports, and the ports on the bottom row start with 1 followed by the remaining odd-numbered ports.
- Uplink ports in EX2200, EX3200, EX4200, and EX4500 switches are labeled from left to right, starting with 0.
- On EX8200 switches, the network ports are numbered from left to right on each line card. On line cards that have two rows of ports, the ports on the top row start with 0 followed by the remaining even-numbered ports, and the ports on the bottom row start with 1 followed by the remaining odd-numbered ports.
Logical Part of an Interface Name
The logical unit part of the interface name corresponds to the logical unit number, which can be a number from 0 through 16384. In the virtual part of the name, a period (.) separates the port and logical unit numbers: type-fpc/pic/port.logical-unit-number. For example, if you issue the show ethernet-switching interfaces command on a system with a default VLAN, the resulting display shows the logical interfaces associated with the VLAN:
Interface State VLAN members Blocking ge-0/0/0.0 down remote-analyzer unblocked ge-0/0/1.0 down default unblocked ge-0/0/10.0 down default unblocked
When you configure aggregated Ethernet interfaces, you configure a logical interface that is called a bundle or a LAG. Each LAG can include up to 8 or 12 Ethernet interfaces, depending on the switch model.
Wildcard Characters in Interface Names
In the show interfaces and clear interfaces commands, you can use wildcard characters in the interface-name option to specify groups of interface names without having to type each name individually. You must enclose all wildcard characters except the asterisk (*) in quotation marks (" ").
