Moving Interfaces; Preventing Ip Spoofing; Routing Protocols; Policies And Qos - Juniper JUNOSE SOFTWARE 11.0.X - BROADBAND ACCESS CONFIGURATION GUIDE 4-1-2010 Configuration Manual

without VLANs. Using subscriber interfaces, the router can demultiplex or separate
the traffic associated with different subscribers.
You can configure subscriber interfaces with VLANs. If you do so, the E Series router
demultiplexes packets by using first the VLAN and then the subscriber interface.

Moving Interfaces

A shared IP interface that has associated subscriber demultiplexing attributes retains
these attributes when it moves.
For details about moving shared IP interfaces, see the Moving IP Interfaces section
in JUNOSe IP, IPv6, and IGP Configuration Guide .

Preventing IP Spoofing

You can prevent IP spoofing on subscriber interfaces by using media access control
(MAC) address validation.
For information about configuring MAC address validation, see the MAC Address
Validation section in JUNOSe IP, IPv6, and IGP Configuration Guide.
For information about the relationship between the MAC address validation state
and dynamically created subscriber interfaces, see "Inheritance of MAC Address
Validation State for Dynamic Subscriber Interfaces" on page 607.

Routing Protocols

You configure unicast routing protocols on subscriber interfaces in the same way
that you configure routing protocols on primary IP interfaces, provided that you
configure them to use unicast addressing when communicating with a peer. You can
also enable multicast routing protocols such as IGMP on subscriber interfaces;
however, we do not recommend this type of configuration.

Policies and QoS

You can configure policies, such as rate limiting and filtering, and quality of service
(QoS) for subscriber interfaces in the same way that you do for primary IP interfaces.
For more information, see the JUNOSe Policy Management Configuration Guide and
the JUNOSe Quality of Service Configuration Guide.

Applications

In a cable modem network, service providers can use subscriber interfaces to:
Direct traffic toward special local content in the network
Differentiate traffic for virtual private networks (VPNs)
Chapter 25: Configuring Subscriber Interfaces
Subscriber Interfaces Overview
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