Ocx/Stmx Pos Ioas; Numbering Scheme; Erx7Xx Models, Erx14Xx Models, And The Erx310 Router; Figure 7: Interface Stack For Ocx/Stmx Pos Interfaces - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - PHYSICAL LAYER CONFIGURATION GUIDE 2010-09-24 Configuration Manual

Numbering Scheme

Copyright © 2010, Juniper Networks, Inc.
The ES2 4G LM also pairs with the ES2-S1 OC12-2 STM4 ATM IOA to deliver unchannelized
OC12/STM4 ATM operation through two line interfaces. You can install the ES2-S1 OC12-2
STM4 ATM IOA in both IOA bays.
The interface stack for both of these IOAs is the same as for OCx/STMx/DS3-ATM
interfaces. (See Figure 5 on page 76.)

OCx/STMx POS IOAs

The ES2 4G LM pairs with the ES2-S1 OC12-2 STM4 POS IOA to deliver unchannelized
OC12/STM4 POS operation through two line interfaces. You can install the ES2-S1 OC12-2
STM4 POS IOA in both IOA bays.
The ES2 4G LM also pairs with the ES2-S1 OC48 STM16 POS IOA to deliver unchannelized
OC48/STM16 POS operation through one line interface. In the current release, you can
install the ES2-S1 OC48 STM16 POS IOA in only one of the IOA bays per slot.
Figure 7 on page 79 shows the interface stack for OCx/STMx POS interfaces on the ES2
4G LM.

Figure 7: Interface Stack for OCx/STMx POS Interfaces

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 format to identify unchannelized SONET/SDH interfaces. Interfaces
that support APS/MSP also use the APS/MSP channel number.
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 unchannelized SONET/SDH
interfaces on ports 0 and 1; port 2 is reserved for a Gigabit Ethernet interface.
Chapter 3: Configuring Unchannelized OCx/STMx Interfaces
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