ON THIS PAGE
Example: Configuring a Static PPPoE Subscriber Interface over ATM
This example illustrates a Point-to-Point Protocol over Ethernet (PPPoE) over ATM configuration that creates a static PPPoE (pp0) subscriber interface over a static ATM underlying interface on an MX Series router. The router must have Module Port Concentrator/Modular Interface Card (MPC/MIC) interfaces that use an ATM MIC with small form-factor pluggable transceiver (SFP).
You can also configure a dynamic PPPoE interface over a static ATM underlying interface on an MX Series router with an ATM MIC with SFP installed. For information, see Example: Configuring a Dynamic PPPoE Subscriber Interface over ATM.
Requirements
This example uses the following software and hardware components:
MX Series 5G Universal Routing Platform
ATM MIC with SFP (Model Number MIC-3D-8OC3-2OC12-ATM) and compatible MPC1 or MPC2
Before you begin:
Make sure the MX Series router you are using has an ATM MIC with SFP installed and operational.
For information about compatible MPCs for the ATM MIC with SFP, see the MX Series Interface Module Reference.
For information about installing MPCs and MICs in an MX Series router, see the Hardware Guide for your MX Series router model.
Make sure you understand how to configure and use static ATM interfaces.
Overview
By using the ATM MIC with SFP and a supported MPC, you can configure an MX Series router to support static PPPoE subscriber access over an ATM network using ATM Adaptation Layer 5 (AAL5) permanent virtual connections (PVCs). PPPoE-over-ATM configurations on MX Series routers consist of one or more statically created PPPoE (pp0) logical subscriber interfaces over a static ATM underlying interface. Most PPPoE and subscriber services features supported on terminated connections and tunneled (L2TP access concentrator, or LAC) connections are also supported for PPPoE-over-ATM connections on an MX Series router.
This example include the following basic steps to configure static PPPoE-over-ATM subscriber access on an MX Series router:
Statically configure ATM physical interface at-1/0/6 with virtual path identifier (VPI) 6.
Statically configure logical unit 2 on the ATM physical interface (at-1/0/6.2) with the following properties:
PPPoE-over-ATM logical link control (LLC) encapsulation (ppp-over-ether-over-atm-llc)
Virtual circuit identifier (VCI) 2 on VPI 6. The combination of VPIs and VCIs provisions the ATM AAL5 PVC for access over the ATM network.
(Optional) PPPoE-specific options at the [edit interfaces interface-name unit logical-unit-number family pppoe] hierarchy level
Note For dynamic or static PPPoE-over-ATM configurations on MX Series routers, You must specify PPPoE-specific options in the family pppoe stanza at the [edit interfaces interface-name unit logical-unit-number] hierarchy level. Specifying PPPoE-specific options in the pppoe-underlying-options stanza at the [edit interfaces interface-name unit logical-unit-number] hierarchy level is not supported for these configurations.
Statically configure the pp0 logical subscriber interface (pp0.2) with at least the following properties:
The name of the underlying ATM interface (at-1/0/6.2)
The server statement, which configures the router to act as a PPPoE server
The unnumbered address (lo0.0) for the inet (IPv4) or inet6 (IPv6) protocol family
In static PPPoE-over-ATM configurations, each pp0 logical interface configured at the [edit interfaces pp0 unit logical-unit-number] hierarchy level corresponds to a static PPPoE subscriber interface.
Configuration
To configure a static PPPoE subscriber interface over an underlying ATM interface, perform these tasks:
CLI Quick Configuration
To quickly configure this example, copy the following commands, paste them in a text file, remove any line breaks, change any details necessary to match your network configuration, and then copy and paste the commands into the CLI at the [edit] hierarchy level.
Configuring the ATM Physical Interface
Step-by-Step Procedure
To configure the ATM physical interface:
- Specify that you want to configure ATM-specific options
on the physical interface.[edit interfaces at-1/0/6]user@host# edit atm-options
- Configure one or more VPIs on the physical interface.[edit interfaces at-1/0/6 atm-options]user@host# set vpi 6
Results
From the [edit] hierarchy level in configuration mode, confirm the results of the ATM physical interface configuration by issuing the show interfaces at-1/0/6 command. If the output does not display the intended configuration, repeat the instructions in this example to correct it.
If you are done configuring the ATM physical interface, enter commit from configuration mode.
Configuring Encapsulation, VCI, and PPPoE Options on Logical Unit 2
Step-by-Step Procedure
To configure encapsulation, VCI, and PPPoE options on logical unit 2:
- Configure PPPoE-over-ATM LLC encapsulation on the interface.[edit interfaces at-1/0/6 unit 2]user@host# set encapsulation ppp-over-ether-over-atm-llc
- Configure the VCI for the logical interface.[edit interfaces at-1/0/6 unit 2]user@host# set vci 6.2
This statement configures VCI 2 on VPI 6.
- Specify that you want to configure the PPPoE protocol
family.[edit interfaces at-1/0/6 unit 2]user@host# edit family pppoe
- Configure additional PPPoE-specific options for the dynamic
subscriber interface.[edit interfaces at-1/0/6 unit 2 family pppoe]user@host# set duplicate-protectionuser@host# set short-cycle-protection lockout-time-min 120 lockout-time-max 240user@host# set max-sessions 3user@host# set max-sessions-vsa-ignoreuser@host# set access-concentrator ac-pppoeoa
Results
From the [edit] hierarchy level in configuration mode, confirm the results of the configuration on logical unit 2 by issuing the show interfaces at-1/0/6.2 command. If the output does not display the intended configuration, repeat the instructions in this example to correct it.
If you are done configuring logical unit 2, enter commit from configuration mode.
Configuring the Static PPPoE Subscriber Interface
Step-by-Step Procedure
To configure the static PPPoE subscriber interface:
- Specify that you want to configure the pp0 subscriber
interface on logical unit 2.[edit]user@host# edit interfaces pp0 unit 2
- Specify that you want to configure PPP options for the
subscriber interface.[edit interfaces pp0 unit 2]user@host# edit ppp-options
- Configure Challenge Handshake Authentication Protocol
(CHAP) authentication for the subscriber interface.[edit interfaces pp0 unit 2 ppp-options]user@host# set chapuser@host# up
- Specify that you want to configure PPPoE-specific options.[edit interfaces pp0 unit 2]user@host# edit pppoe-options
- Associate the PPPoE subscriber interface with the underlying
ATM interface.[edit interfaces pp0 unit 2 pppoe-options]user@host# set underlying-interface at-1/0/6.2
- Configure the router to act as a PPPoE server, also known
as a remote access concentrator.[edit interfaces pp0 unit 2 pppoe-options]user@host# set serveruser@host# up
- Configure the interval for sending keepalive requests.[edit interfaces pp0 unit 2]user@host# set keepalives interval 10
- Specify that you want to configure the IPv4 (inet) protocol family.[edit interfaces pp0 unit 2]user@host# edit family inet
- Configure the unnumbered address for the protocol family.[edit interfaces pp0 unit 2 family inet]user@host# set unnumbered-address lo0.0
Results
From the [edit] hierarchy level in configuration mode, confirm the results of the static PPPoE subscriber interface configuration by issuing the show interfaces pp0 command. If the output does not display the intended configuration, repeat the instructions in this example to correct it.
If you are done configuring the static PPPoE subscriber interface, enter commit from configuration mode.
Verification
To confirm that the static PPPoE subscriber interface pp0.2 is properly configured on ATM underlying interface at-1/0/6.2, perform the following tasks:
Verifying the Encapsulation, VCI, and PPPoE Options Configuration on Logical Unit 2
Verifying the Static PPPoE Subscriber Interface Configuration
Verifying the ATM Physical Interface Configuration
Purpose
Verify that ATM physical interface at-1/0/6 is properly configured for use with ATM PVCs.
Action
From operational mode, issue the show interfaces at-1/0/6 command.
For brevity, this show command output includes only the configuration that is relevant to the at-1/0/6 physical interface. Any other configuration on the system has been replaced with ellipses (...).
user@host> show interfaces at-1/0/6Physical interface: at-1/0/6, Enabled, Physical link is Down
Interface index: 179, SNMP ifIndex: 598
Link-level type: ATM-PVC, MTU: 2048, Clocking: Internal, SDH mode, Speed: OC3, Loopback: None, Payload scrambler: Enabled
Device flags : Present Running Down
Link flags : None
CoS queues : 8 supported, 8 maximum usable queues
Schedulers : 0
Current address: 00:00:5e:00:53:9b
Last flapped : 2012-09-19 07:57:59 PDT (07:46:56 ago)
Input rate : 0 bps (0 pps)
Output rate : 0 bps (0 pps)
SDH alarms : LOL, LOS
SDH defects : LOL, LOS, LOP, BERR-SF, HP-FERF
VPI 6
Flags: Active
Total down time: 0 sec, Last down: Never
Traffic statistics:
Input packets: 0
Output packets: 0
...Meaning
ATM-PVC in the Link-level Type field indicates that encapsulation for ATM permanent virtual circuits is being used on ATM physical interface at-1/0/6. The Active flag for VPI 6 indicates that the virtual path is up and operational.
Verifying the Encapsulation, VCI, and PPPoE Options Configuration on Logical Unit 2
Purpose
Verify that the encapsulation, VCI, and PPPoE settings have been properly configured on logical unit 2 (at-1/0/6.2).
Action
From operational mode, issue the show interfaces at-1/0/6.2 command.
user@host> show interfaces at-1/0/6.2 Logical interface at-1/0/6.2 (Index 345) (SNMP ifIndex 1990)
Flags: Device-Down Point-To-Point SNMP-Traps 0x4000 Encapsulation: PPPoE-over-ATM-LLC
Input packets : 0
Output packets: 0
Protocol pppoe
Dynamic Profile: None,
Service Name Table: None,
Max Sessions: 3, Max Sessions VSA Ignore: On,
Duplicate Protection: On, Short Cycle Protection: mac-address,
AC Name: ac-pppoeoa
VCI 6.2
Flags: Active
Total down time: 0 sec, Last down: Never
Input packets : 0
Output packets: 0
Meaning
PPPoE-over-ATM-LLC in the Encapsulation field indicates that logical interface at-1/0/6.2 is properly configured for PPPoE-over-ATM LLC encapsulation. Protocol pppoe indicates that the PPPoE protocol family has been properly configured on the logical interface. The Active flag for VCI 6.2 indicates that VCI 2 on VPI 6 is up and operational.
Verifying the Static PPPoE Subscriber Interface Configuration
Purpose
Verify that the static PPPoE subscriber interface (pp0.2) is properly configured.
Action
From operational mode, issue the show interfaces pp0 command.
user@host> show interfaces pp0Physical interface: pp0, Enabled, Physical link is Up
Interface index: 131, SNMP ifIndex: 505
Type: PPPoE, Link-level type: PPPoE, MTU: 1532
Device flags : Present Running
Interface flags: Point-To-Point SNMP-Traps
Link type : Full-Duplex
Link flags : None
Logical interface pp0.2 (Index 360) (SNMP ifIndex 1991)
Flags: Hardware-Down Point-To-Point SNMP-Traps 0x4000 Encapsulation: PPPoE
PPPoE:
State: SessionDown, Session ID: None,
Underlying interface: at-1/0/6.2 (Index 345)
Input packets : 0
Output packets: 0
Keepalive settings: Interval 10 seconds, Up-count 1, Down-count 3
LCP state: Not-configured
NCP state: inet: Not-configured, inet6: Not-configured, iso: Not-configured, mpls: Not-configured
CHAP state: Closed
PAP state: Closed
Protocol inet, MTU: 1492
Flags: Sendbcast-pkt-to-re, Protocol-Down
Addresses, Flags: Dest-route-down Is-Preferred Is-Primary
Destination: 198.51.100/24, Local: 198.51.100.11
Meaning
PPPoE in the Link-level type field indicates that PPPoE encapsulation is in use on the pp0 physical interface. PPPoE in the Encapsulation field indicates that PPPoE encapsulation is also in use on the pp0.2 logical subscriber interface. The Underlying interface field indicates that at-1/0/6.2 is properly configured as the underlying interface for the static PPPoE subscriber interface. Protocol inet indicates that the IPv4 protocol family is properly configured on the pp0.2 logical subscriber interface.
Verifying the PPPoE Underlying Interface Configuration
Purpose
Verify that the underlying interface is properly configured for static PPPoE-over-ATM subscriber access.
Action
From operational mode, issue the show pppoe underlying-interfaces at-1/0/6.2 extensive command.
user@host> show pppoe underlying-interfaces at-1/0/6.2
extensiveat-1/0/6.2 Index 345
State: Static, Dynamic Profile: None,
Max Sessions: 3, Max Sessions VSA Ignore: On,
Active Sessions: 0,
Service Name Table: None,
Duplicate Protection: On, Short Cycle Protection: mac-address,
AC Name: ac-pppoeoa,
PacketType Sent Received
PADI 0 0
PADO 0 0
PADR 0 0
PADS 0 0
PADT 0 0
Service name error 0 0
AC system error 0 0
Generic error 0 0
Malformed packets 0 0
Unknown packets 0 0
Lockout Time (sec): Min: 120, Max: 240
Total clients in lockout: 0
Total clients in lockout grace period: 0
Meaning
This command indicates that ATM logical interface at-1/0/6.2 is properly configured as the PPPoE underlying interface. Static in the State field indicates that at-1/0/0/.2 is statically configured. The remaining fields display information about the PPPoE-specific interface options configured for the PPPoE underlying interface at the [edit interfaces at-1/0/6 unit 2 family pppoe] hierarchy level. The Lockout Time fields, which appear in this command only when you display the extensive level of output, show the minimum lockout time (120 seconds) and maximum lockout time (240 seconds) configured for the PPPoE underlying interface.