Numbering Scheme; Erx7Xx Models, Erx14Xx Models, And The Erx310 Router; E120 And E320 Routers; Chapter 5 Configuring Ethernet Interfaces - Juniper PHYSICAL LAYER - CONFIGURATION GUIDE V11.1.X Configuration Manual

For detailed information about the modules that support Fast Ethernet and Gigabit
Ethernet interfaces on the ERX14xx models, ERX7xx models, and the ERX310 router:
For detailed information about the modules that support Gigabit Ethernet and
10-Gigabit Ethernet interfaces on the E120 and E320 Broadband Services routers:

Numbering Scheme

When configuring or managing an interface, you must know the numbering scheme
for identifying an interface. The numbering scheme depends on the type of E Series
router that you have.

ERX7xx Models, ERX14xx Models, and the ERX310 Router

Use the slot/port [.subinterface] format to identify Ethernet interfaces and
subinterfaces.
For information about installing line modules and I/O modules in ERX routers, see
ERX Hardware Guide, Chapter 4, Installing Modules.

E120 and E320 Routers

Use the slot/adapter/port [.subinterface] format to identify Ethernet interfaces and
subinterfaces.
See ERX Module Guide, Table 1, Module Combinations for detailed specifications
of these modules.
See ERX Module Guide, Appendix A, Module Protocol Support for information about
the protocols and applications that Ethernet modules support.
See E120 and E320 Module Guide, Table 1, Modules and IOAs for detailed
specifications of these modules.
See E120 and E320 Module Guide, Appendix A, IOA Protocol Support for information
about the protocols and applications that Ethernet modules support.
slot Number of the slot in which the line module resides in the chassis.
In ERX7xx models, line module slots are numbered 2-6; slots 0 and 1 are reserved
for SRP modules. In ERX14xx models, line module slots are numbered 0–5 and
8–13; slots 6 and 7 are reserved for SRP modules. In an ERX310 router, line
module slots are numbered 1–2; slot 0 is reserved for the SRP module.
port Number of the port on the I/O module.
On the OC3-2 GE APS I/O module, you can configure only a Gigabit Ethernet
interface in port 2; ports 0 and 1 are reserved for OC3/STM1 ATM interfaces.
subinterface Subinterface number of the protocol or VLAN subinterface.
Chapter 5: Configuring Ethernet Interfaces
Ethernet Interface Platform Considerations
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