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Subscriber Interfaces on E Series Broadband Services Routers, Release 13.2

The subscriber interfaces can provide different levels of services for individual subscribers in an access network. You can configure subscriber interfaces to be static or dynamic. To identify subscribers statically, you can reference a static VLAN interface or a static IP demux interface in a dynamic profile. IP demultiplexing (demux) interfaces are logical interfaces that share a common, underlying logical interface. Statically created interfaces allocate and consume system resources when the interface is created.

The router creates dynamic subscriber interfaces (DSIs) on demand, in response to external events, such as when a DHCP event occurs or when the router detects a packet. DSIs function in a manner similar to dynamic interfaces.

This page provides information that describes how to configure static and dynamic subscriber interfaces for remote access to E Series routers.

JunosE Software Documentation for E Series Broadband Services Routers, Release 13.2

Overview
Configuration
Administration
Troubleshooting

Understanding Static and Dynamic Subscriber Interfaces

Subscriber Interfaces Overview

Dynamic Interfaces and Dynamic Subscriber Interfaces Overview

Characteristics of Subscriber Interfaces

Applications for Subscriber Interfaces

Subscriber Interfaces References

Subscriber Interfaces Platform Considerations

Dynamic Subscriber Interfaces Creation Methods

Dynamic Subscriber Interfaces Using Packet Detection Overview

Dynamic Subscriber Interfaces Using DHCP Events Overview

Dynamic Creation of Subscriber Interfaces Overview

MAC Address Validation State for Dynamic Subscriber Interfaces

How MAC Address Validation State Inheritance Works

Inheritance of MAC Address Validation State for Dynamic Subscriber Interfaces Overview

Configuration Tasks for Static Subscriber Interfaces
Example: Configuring Static Subscriber Interfaces

Configuration Tasks for Dynamic Subscriber Interfaces

Example: Configuring Dynamic Subscriber Interfaces

Example: Configuring Dynamic Subscriber Interfaces Using Loopback Interfaces

Configuration Commands

encapsulation bridge1483

encapsulation vlan

interface fastEthernet

interface gigabitEthernet

interface tenGigabitEthernet

interface loopback

ip auto-configure append-virtual-router-name

ip auto-configure ip-subscriber

ip auto-detect ip-subscriber

ip demux-type da-prefix

ip destination-prefix

ip share-interface

ip share-nexthop

ip source-prefix

ip dhcp-local pool

ip inactivity-timer

ip source-prefix

ip use-framed-routes ip-subscriber

service dhcp-local

set dhcp relay giaddr-selects-interface

Monitoring Tasks

Monitoring Subscriber Interfaces Overview

Monitoring Subscriber Interfaces

Monitoring Active IP Subscribers Created by Subscriber Management

Monitoring Commands

show ip demux interface

show ip-subscriber

Knowledge Base

Subscriber interfaces fail to receive policy attachments via SDX

QoS queues not applied to L2TP subscriber interfaces on the LNS

SDX does not always manage DHCP users on Dynamic Subscriber Interfaces

ERX SSC client does not send nasPortId for subscriber interfaces to SDX

DHCP clients on static subscriber interfaces are unable to be managed by SDX

SDX does not always include accounting data for DHCP subscribers on Dynamic Subscriber Interfaces

SSC client does not send nasPortId in COPS message to SDX for subscriber interfaces

lm10 Reset:lm10a crashes continuously after reloading with configuration of 8k Subscriber interfaces

Line card reset: Ping failure threshold exceeded reset while running traffic over subscriber interfaces.

When Subscriber interfaces are redistributed into OSPF, OSPF will delete and add all external routes

SDX discards valid pending DHCP notifications for dynamic subscriber interfaces when subscriber IP address is reused frequently.

ERX RADIUS accounting acct-terminate-cause attribute is always the same value for dynamic subscriber interfaces

ERX stops creating and deleting Dynamic subscriber interfaces after ERX was under very heavy Dynamic subscriber and DHCP load

LM4 primary and subscriber interface statistics are not correctly incremented

SAE Managed Static Subscriber interface do not send DRQ when manually shutdown

SDX fails to install a default output policy on a subscriber interface

Secondary input-policy on subscriber interface drops egress traffic on MPLS enabled uplinks

IP access-internal/access routes are not created for subscriber bridge1483 interfaces.

E Series fails to process ARP requests/responses from clients in a static subscriber interface configuration

Policy assigned to a Dynamic Subscriber Interface no longer works after an HA enabled SRP switch is performed

Setup rate of Dynamic Subscriber Interface (DSI) drops as the data rate of the packets which trigger the DSI creation increases

Access internal route cannot be added for Dynamic Subscriber Interface (DSI) created while SRP utilization is running at 100% after router reload

DHCP subscriber interface references shown in the output of 'show subscribers' and 'show ip route' is different

Framed route returned from Radius not installed for IP subscriber interface

RADIUS CoA using an IP/VR pair to identify the subscriber interface fails

Sample config for DSI interfaces with Route based policies.

Traffic does not flow through a DSI after an LM4 reload

MAC address validation is not working for auto-detected DSI subscribers

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