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Copyright © 2010, Juniper Networks, Inc.
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
A cOC3/STM1 I/O module has four ports. Each port accepts one pair of SC-style fiber
connectors.
The cOC12/STM4 I/O module has one or two ports. On an I/O module that supports
two ports, one port is active (primary) and the other is redundant. Cabling both ports
provides a redundant path to the interface. If the active port fails, the redundant port
automatically becomes active. You can configure only port 0 on a cOC12/STM4 I/O
module. Port 0 accepts one pair of SC-style fiber connectors.
On I/O modules that support APS/MSP, the port numbers for the working (primary)
interfaces are assigned the lower half of the numbered interfaces, whereas the port
numbers for the protect (redundant) interfaces are assigned the upper half of the
numbered interfaces. For example, on an I/O module that provides one primary port
and one redundant port, the working interface is port 0 and the protect interface is
port 1.
APS/MSP channel number—Identifier of the working or protect interface for
configuration purposes
The protect interface is always assigned channel number 0. The working interface is
always assigned channel number 1.
For information about installing line modules and I/O modules in ERX routers, see ERX
Hardware Guide, Chapter 4, Installing Modules.
For more information about MIB support for cOCx/STMx interfaces, consult the following
resources:
RFC 1661—The Point-to-Point Protocol (PPP) (July 1994)
RFC 2495—Definitions of Managed Objects for the DS1, E1, DS2 and E2 Interface Types
(January 1999)
RFC 2496—Definitions of Managed Objects for the DS3/E3 Interface Types (January
1999)
RFC 2558—Definitions of Managed Objects for the SONET/SDH Interface Type (March
1999)
For more information about APS/MSP, consult the following resources:
Chapter 4: Configuring Channelized OCx/STMx Interfaces
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