ON THIS PAGE
Example: Configuring a Dynamic PPPoE Subscriber Interface on a Dynamic Underlying VLAN Demux Interface over Aggregated Ethernet
This example shows how you can configure dynamic PPPoE subscriber interfaces over aggregated Ethernet bundles to provide subscriber link redundancy.
Requirements
PPPoE over VLAN demux interfaces over aggregated Ethernet requires the following hardware and software:
MX Series 5G Universal Routing Platforms
MPCs
Junos OS Release 11.2 or later
No special configuration beyond device initialization is required before you can configure this feature.
Overview
Aggregated Ethernet bundles enable link redundancy between the router and networking devices connected by Ethernet links. This example describes how to configure link redundancy for dynamic PPPoE subscribers over aggregated Ethernet with an intermediate dynamic VLAN demux interface. Sample tasks include configuring a two-member aggregated Ethernet bundle, configuring dynamic profiles that establish the dynamic VLAN demux interface that underlies the PPPoE subscriber interface, and configuring the dynamic profile that establishes the dynamic PPPoE subscriber interfaces.
In this example, two different dynamic profiles are configured to instantiate either VLAN (vlan-profile) or S-VLAN (svlan-profile) demux interfaces. These profiles define PPPoE family options and include the dynamic PPPoE profile (pppoe-profile) that creates the PPPoE subscriber interface. Junos OS predefined variables are used in each profile to represent the interfaces and VLAN identifiers that are dynamically created. These dynamic profiles include the following predefined variables:
$junos-interface-unit—Represents the logical unit number of the dynamic VLAN demux interface. This predefined variable is dynamically replaced with the unit number supplied by the router when the subscriber logs in.$junos-interface-ifd-name—Represents the underlying logical interface on which the PPPoE subscriber interface is created. This predefined variable is dynamically replaced with the name of the underlying interface supplied by the router when the subscriber logs in.$junos-vlan-id—Represents the VLAN identifier. This predefined variable is dynamically replaced with a VLAN ID when the subscriber logs in. The VLAN ID is allocated within the VLAN range specified in the aggregated Ethernet configuration. In the case of the S-VLAN demux,$junos-vlan-idrepresents the inner VLAN identifier.$junos-stacked-vlan-id—Represents the outer VLAN identifier for the stacked VLAN. This predefined variable is dynamically replaced with a VLAN ID when the subscriber logs in. The VLAN ID is allocated within the VLAN range specified in the aggregated Ethernet configuration. This variable is not used for the VLAN demux configuration.
The dynamic PPPoE profile (pppoe-profile) creates the PPPoE subscriber interface. It also configures the router to act as a PPPoE server and enables the local address to be derived from the specified address without assigning an explicit IP address to the interface. The pppoe-profile dynamic profile is assigned to the dynamic, intermediate VLAN and S-VLAN demux interfaces. This dynamic profile includes the following predefined variables:
$junos-interface-unit—Represents the logical unit number of the dynamic PPPoE logical interface. This predefined variable is dynamically replaced with the unit number supplied by the router when the subscriber logs in.$junos-underlying-interface—Represents the name of the underlying Ethernet interface. This predefined variable is dynamically replaced with the interface name supplied by the router when the subscriber logs in.
This example does not show all possible configuration choices.
Configuration
Procedure
CLI Quick Configuration
To quickly configure link redundancy for dynamic PPPoE subscribers over a dynamic VLAN demux interface over aggregated Ethernet, copy the following commands, paste them in a text file, remove any line breaks, and then copy and paste the commands into the CLI.
[edit] set chassis aggregated-devices ethernet device-count 1 set interfaces ge-5/0/3 gigether-options 802.3ad ae0 set interfaces ge-5/0/3 gigether-options 802.3ad primary set interfaces ge-5/1/2 gigether-options 802.3ad ae0 set interfaces ge-5/1/2 gigether-options 802.3ad backup edit interfaces ae0 set flexible-vlan-tagging set aggregated-ether-options link-protection edit auto-configure set vlan-ranges dynamic-profile vlan-profile accept pppoe set vlan-ranges dynamic-profile vlan-profile ranges 1-4094 set stacked-vlan-ranges dynamic-profile svlan-profile accept pppoe set stacked-vlan-ranges dynamic-profile svlan-profile ranges 1-4094,1-4094 top edit dynamic-profiles pppoe-profile edit interfaces pp0 unit $junos-interface-unit set pppoe-options underlying-interface $junos-underlying-interface set pppoe-options server set family inet unnumbered-address lo0.0 top edit dynamic-profiles vlan-profile interfaces demux0 edit unit $junos-interface-unit set vlan-id $junos-vlan-id set demux-options underlying-interface $junos-interface-ifd-name set family pppoe access-concentrator pppoe-server-1 set family pppoe duplicate-protection set family pppoe dynamic-profile pppoe-profile top edit dynamic-profiles svlan-profile interfaces demux0 edit unit $junos-interface-unit set vlan-tags outer $junos-stacked-vlan-id set vlan-tags inner $junos-vlan-id set demux-options underlying-interface $junos-interface-ifd-name set family pppoe access-concentrator pppoe-server-1 set family pppoe duplicate-protection set family pppoe dynamic-profile pppoe-profile top
Step-by-Step Procedure
The following example requires you to navigate various levels in the configuration hierarchy. For instructions on how to do that, see Using the CLI Editor in Configuration Mode.
To configure link redundancy for dynamic PPPoE subscribers over a dynamic VLAN demux interface over aggregated Ethernet:
Define the number of aggregated Ethernet devices on the router.
[edit chassis] user@host# set aggregated-devices ethernet device-count 1
Configure a two-link aggregated Ethernet logical interface to serve as the underlying interface for the dynamic VLAN demux subscriber interface. In this example, the LAG bundle is configured for one-to-one active/backup link redundancy. To support link redundancy at the MPC level, the LAG bundle attaches to ports from two different MPCs.
[edit interfaces] user@host# set ge-5/0/3 gigether-options 802.3ad ae0 user@host# set ge-5/0/3 gigether-options 802.3ad primary user@host# set ge-5/1/2 gigether-options 802.3ad ae0 user@host# set ge-5/1/2 gigether-options 802.3ad backup
Enable link protection on the aggregated Ethernet logical interface and configure support for single and dual (stacked) VLAN tags.
[edit interfaces] user@host# set ae0 aggregated-ether-options link-protection user@host# set ae0 flexible-vlan-tagging
Configure the parameters for automatically configuring VLANs and S-VLANs, including the VLAN ranges and dynamic profiles.
[edit interfaces] user@host# set ae0 auto-configure vlan-ranges dynamic-profile vlan-profile accept pppoe user@host# set ae0 auto-configure vlan-ranges dynamic-profile vlan-profile ranges 1-4094 user@host# set ae0 auto-configure stacked-vlan-ranges dynamic-profile svlan-profile accept pppoe user@host# set ae0 auto-configure stacked-vlan-ranges dynamic-profile svlan-profile ranges 1-4094,1-4094
Configure the dynamic profile that creates the PPPoE subscriber interface.
[edit dynamic-profiles pppoe-profile] user@host# edit interfaces pp0 unit $junos-interface-unit [edit dynamic-profiles pppoe-profile interfaces pp0 unit "$junos-interface-unit"] user@host# set pppoe-options underlying-interface $junos-underlying-interface user@host# set pppoe-options server user@host# set family inet unnumbered-address lo0.0
Configure the dynamic profile that creates VLAN demux underlying interfaces, including the PPPoE family attributes.
[edit dynamic-profiles vlan-profile] user@host# edit interfaces demux0 unit $junos-interface-unit [edit dynamic-profiles vlan-profile interfaces demux0 unit "$junos-interface-unit"] user@host# set vlan-id $junos-vlan-id user@host# set demux-options underlying-interface $junos-interface-ifd-name user@host# set family pppoe access-concentrator pppoe-server-1 user@host# set family pppoe duplicate-protection user@host# set family pppoe dynamic-profile pppoe-profile
Configure the dynamic profile that creates S-VLAN demux underlying interfaces, including the PPPoE family attributes.
[edit dynamic-profiles svlan-profile] user@host# edit interfaces demux0 unit $junos-interface-unit [edit dynamic-profiles svlan-profile interfaces demux0 unit "$junos-interface-unit"] user@host# set vlan-tags outer $junos-stacked-vlan-id user@host# set vlan-tags inner $junos-vlan-id user@host# set demux-options underlying-interface $junos-interface-ifd-name user@host# set family pppoe access-concentrator pppoe-server-1 user@host# set family pppoe duplicate-protection user@host# set family pppoe dynamic-profile pppoe-profile
Results
From configuration mode, confirm the aggregated device configuration by entering the show chassis command. Confirm the interface configuration by entering the show interfaces command. Confirm the dynamic profile configuration by entering the show dynamic-profiles command. If the output does not display the intended configuration, repeat the configuration instructions in this example to correct it.
[edit]
user@host# show chassis
aggregated-devices {
ethernet {
device-count 1;
}
}
[edit]
user@host# show interfaces
ge-5/0/3 {
gigether-options {
802.3ad {
ae0;
primary;
}
}
}
ge-5/1/2 {
gigether-options {
802.3ad {
ae0;
backup;
}
}
}
ae0 {
flexible-vlan-tagging;
aggregated-ether-options {
link-protection;
}
auto-configure {
vlan-ranges {
dynamic-profile {
vlan-profile {
accept pppoe;
vlan-ranges 1–4094};
}
}
}
stacked-vlan-ranges {
dynamic-profile {
svlan-profile {
accept pppoe;
vlan-ranges 1–4094,1–4094;
}
}
}
}
}
[edit]
user@host# show dynamic-profiles
pppoe-profile {
interfaces {
pp0 {
unit $junos-interface-unit {
pppoe-options {
underlying-interface $junos-underlying-interface;
server;
}
family inet {
unnumbered-address lo0.0;
}
}
}
}
}
vlan-profile {
interfaces {
demux0 {
unit "$junos-interface-unit" {
vlan-id "$junos-vlan-id";
demux-options {
underlying-interface "$junos-interface-ifd-name";
}
family pppoe {
access-concentrator pppoe-server-1;
duplicate-protection;
dynamic-profile pppoe-profile;
}
}
}
}
}
svlan-profile {
interfaces {
demux0 {
unit "$junos-interface-unit" {
vlan-tags outer "$junos-stacked-vlan-id" inner "$junos-vlan-id";
demux-options {
underlying-interface "$junos-interface-ifd-name";
}
family pppoe {
access-concentrator pppoe-server-1;
duplicate-protection;
dynamic-profile pppoe-profile;
}
}
}
}
}
If you are done configuring the device, enter commit from configuration mode.
Verification
To confirm that the configuration is working properly, perform this task:
Verifying the Aggregated Ethernet Interface Configuration
Purpose
Verify that the interface values match your configuration, the link is up, and traffic is flowing.
Action
From operational mode, enter the show interfaces redundancy command.
user@host> show interfaces redundancy Interface State Last change Primary Secondary Current status ae0 On primary ge-5/0/3 ge-5/1/2 both up
From operational mode, enter the show interfaces ae0 command.
user@host> show interfaces ae0
Physical interface: ae0, Enabled, Physical link is Up
Interface index: 128, SNMP ifIndex: 606
Link-level type: Ethernet, MTU: 1522, Speed: 1Gbps, BPDU Error: None,
MAC-REWRITE Error: None, Loopback: Disabled, Source filtering: Disabled,
Flow control: Disabled, Minimum links needed: 1, Minimum bandwidth needed: 0
Device flags : Present Running
Interface flags: SNMP-Traps Internal: 0x4000
Current address: 00:00:5e:00:53:d0, Hardware address: 00:00:5e:00:53:d0
Last flapped : 2011-03-11 13:24:18 PST (2d 03:34 ago)
Input rate : 1984 bps (2 pps)
Output rate : 0 bps (0 pps)
Logical interface ae0.32767 (Index 69) (SNMP ifIndex 709)
Flags: SNMP-Traps 0x4004000 VLAN-Tag [ 0x0000.0 ] Encapsulation: ENET2
Statistics Packets pps Bytes bps
Bundle:
Input : 371259 2 46036116 1984
Output: 0 0 0 0
Protocol multiservice, MTU: Unlimited
Flags: Is-PrimaryMeaning
The show interfaces redundancy output shows the redundant link configuration and that both link interfaces are up. The show interfaces ae0 output shows that the aggregated Ethernet interface is up and that traffic is being received on the logical interface.