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JUNOS 10.1 Network Interfaces Configuration Guide
Related Topics
Understanding Transient Interfaces
The M Series, MX Series, and T Series routers contain slots for installing FPCs. PICs
can be installed in FPCs. The number of PICs that can be installed varies by router
and type of FPC. The PICs provide the actual physical interfaces to the network. The
MX Series routers contain slots for installing either DPC boards that provide the
physical interfaces to the network or for installing FPCs in which PICs can be installed.
These physical interfaces are transient interfaces of the router. They are referred to
as transient because you can hot-swap a DPC or FPC and its PICs at any time.
You can insert any DPC or FPC into any slot that supports them in the appropriate
router. Typically, you can place any combination of PICs, compatible with your router,
in any location on an FPC. (You are limited by the total FPC bandwidth, and by the
fact that some PICs physically require two or four of the PIC locations on the FPC.
In some cases, power limitations or microcode limitations may also apply.) To
determine DPC and PIC compatibility, see the Hardware Guide, DPC Guide, and PIC
Guide for your router.
You must configure each transient interface based on the slot in which the FPC is
installed, the location in which the PIC is installed, and for multiple port PICs, the
port to which you are connecting.
You can configure the interfaces on PICs that are already installed in the router as
well as interfaces on PICs that you plan to install later. The JUNOS Software detects
which interfaces are actually present, so when the software activates its configuration,
it activates only the present interfaces and retains the configuration information for
the interfaces that are not present. When the JUNOS Software detects that an FPC
containing PICs has been inserted into the router, the software activates the
configuration for those interfaces.
Related Topics
Understanding Services Interfaces
Services interfaces enable you to incrementally add services to your network. The
JUNOS Software supports the following services PICs:
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Understanding Transient Interfaces
Permanent Interfaces Overview on page 33
Types of Interfaces Overview on page 32
Adaptive Services (AS) PICs—Allow you to provide multiple services on a single
PIC by configuring a set of services and applications. The AS PICs offer a special
range of services you configure in one or more service sets.
ES PIC—Provides a security suite for the IP version 4 (IPv4) and IP version 6
(IPv6) network layers. The suite provides functionality such as authentication of
origin, data integrity, confidentiality, replay protection, and nonrepudiation of
source. It also defines mechanisms for key generation and exchange,
management of security associations, and support for digital certificates.
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