Supported Platforms
Example: Dynamic IP Demux Subscriber Interfaces over Dynamic VLAN Demux Interfaces
This example describes how to configure dynamic IP demux interfaces over dynamic VLAN demux interfaces. You can also configure dynamic IP demux interfaces over static VLAN interfaces. For information on how to configure static VLAN interfaces, see the Junos® OS Ethernet Interfaces.
Requirements
Before you begin, make sure to configure either DHCP Relay or DHCP Local Server. You can find information about configuring either of these components in the Junos OS Subscriber Management, Release 12.3.
Overview
You can create a subscriber interface using an IP demux interface stacked on a static or dynamic VLAN demux interface. IP demux interfaces are used to uniquely identify subscribers in an access network based on their IP address
Configuration
- Preparing a Subscriber Access Interface
- Preparing the Loopback Interface
- Configuring a Dynamic Profile to Dynamically Create Single-Tagged VLANs
- Configuring a Dynamic Profile to Dynamically Create IP Demux Interfaces
Preparing a Subscriber Access Interface
CLI Quick Configuration
To quickly configure the aggregated Ethernet interface over which subscribers access the router:
Step-by-Step Procedure
You must configure an interface over which clients initially access the router. We recommend that you specify the same VLAN tagging for the interface that you expect from incoming clients. This example uses flexible VLAN tagging to simultaneously support transmission of 802.1Q VLAN single-tag and dual-tag frames on logical interfaces on the same Ethernet port.
If you want it to automatically create dynamic VLANs, the interface must include the VLAN range type (single or stacked) and contain any specific ranges you want the VLANs to use.
To configure an interface for subscriber access:
- Configure the number of aggregated Ethernet interfaces
on the router.[edit]user@host# set chassis aggregated-devices ethernet device-count 1
- Access the physical interface over which you want subscribers
to initially access the router.[edit]user@host# edit interfaces ge-5/0/9
- Specify the aggregated Ethernet interface to which the
physical interface belongs.[edit interfaces ge-5/0/9]user@host# set gigether-options 802.3ad ae0
- Repeat Step 2 and Step 3 for each interface you want to
assign to the aggregated Ethernet bundle.[edit]user@host# set interfaces ge-5/1/9 gigether-options 802.3ad ae0
- Access the aggregated Ethernet interface.[edit]user@host# edit interfaces ae0
- Specify the VLAN tagging that you want the aggregated
Ethernet interfaces to use.[edit interfaces ae0]user@host# set vlan-tagging
- Edit the auto-configure stanza to automatically
configure VLANs.[edit interfaces ae0]user@host# edit auto-configure
- Edit the vlan-ranges stanza for single-tagged
VLANs.[edit interfaces ae0 auto-configure]user@host# edit vlan-ranges
- Specify the dynamic VLAN profile that you want the interface
to use for dynamically creating single-tagged VLANs.[edit interfaces ae0 auto-configure vlan-ranges]user@host# edit dynamic-profile Auto-VLAN-Demux
- Specify what VLAN Ethernet packet type the VLAN profile
accepts.[edit interfaces ae0 auto-configure vlan-ranges dynamic-profile Auto-VLAN-Demux]user@host# set accept inet
- Specify the VLAN ranges that you want the dynamic profile
to use. The following example specifies a lower VLAN ID limit of 500
and an upper VLAN ID limit of 1000.[edit interfaces ae0 auto-configure vlan-ranges dynamic-profile Auto-VLAN-Demux]user@host# set ranges 500-1000
- (Optional) Activate the transmission of LACP packets on
the aggregated Ethernet interfaces.[edit interfaces ae0]user@host# set aggregated-ether-options lacp active
- Specify that the aggregated Ethernet interfaces use link
protection.[edit interfaces ae0]user@host# set aggregated-ether-options lacp link-protection
Preparing the Loopback Interface
CLI Quick Configuration
To quickly configure the required loopback interface for this example:
Step-by-Step Procedure
You must configure a loopback interface for use as the unnumbered address and preferred source address for dynamically created interfaces.
To configure the required loopback interface for this example:
- Configure a loopback interface.[edit]user@host# edit interfaces lo0.0
- Specify that the loopback interface accept inet packets.[edit interfaces lo0 unit 0]user@host# edit family inet
- Specify the IP address for the loopback interface.[edit interfaces lo0 unit 0 family inet]user@host# set address 100.100.100.1/32
Configuring a Dynamic Profile to Dynamically Create Single-Tagged VLANs
CLI Quick Configuration
To quickly configure the dynamic profile used to dynamically create single-tagged VLANs in the example:
Step-by-Step Procedure
For dynamic IP demux interfaces to reside on a dynamic VLAN demux interface, the VLAN interface must first exist.
To configure a dynamic profile that automatically creates VLAN interfaces:
- Create a dynamic profile for automatically creating single-tagged
VLAN interfaces.[edit]user@host# edit dynamic-profiles Auto-VLAN-Demux
- Specify that the dynamic VLAN profile use the demux interface.[edit dynamic-profiles “Auto-VLAN-Demux”]user@host# edit interfaces demux0
- Specify that the dynamic profile apply the demux interface
unit value to the dynamic VLANs.[edit dynamic-profiles Auto-VLAN-Demux interfaces demux0]user@host# edit unit $junos-interface-unit
- (Optional) Specify that the demux source accepts only
IPv4 (inet) packets.[edit dynamic-profiles Auto-VLAN-Demux interfaces demux0 unit “$junos-interface-unit”]user@host# set demux-source inet
- (Optional) Specify that each dynamically created interface
respond to any ARP request, as long as an active route exists to the
target address of the ARP request.[edit dynamic-profiles Auto-VLAN-Demux interfaces demux0 unit “$junos-interface-unit”]user@host# set proxy-arp
- Specify that VLAN IDs are dynamically created.[edit dynamic-profiles Auto-VLAN-Demux interfaces demux0 unit “$junos-interface-unit”]user@host# set vlan-id $junos-vlan-id
- Specify the logical underlying interface for the dynamic
VLANs.[edit dynamic-profiles Auto-VLAN-Demux interfaces demux0 unit “$junos-interface-unit”]user@host# set demux-options underlying-interface $junos-interface-ifd-name
- Specify that the VLAN demux interface can accept inet
family packets for IPoE/DHCP subscribers.[edit dynamic-profiles Auto-VLAN-Demux interfaces demux0 unit “$junos-interface-unit”]user@host# edit family inet
- Specify the loopback address as the unnumbered address
and preferred source address for the inet family.[edit dynamic-profiles Auto-VLAN-Demux interfaces demux0 unit “$junos-interface-unit” family inet]user@host# set unnumbered-address lo0.0 preferred-source-address 100.100.100.1
Configuring a Dynamic Profile to Dynamically Create IP Demux Interfaces
CLI Quick Configuration
To quickly configure the dynamic profile used to dynamically create IP demux interfaces in the example:
Step-by-Step Procedure
To configure a dynamic profile that automatically creates IP demux interfaces:
- Create a dynamic profile for dynamically creating IP demux
interfaces.[edit]user@host# edit dynamic-profiles DHCP-IP-Demux
- Specify that the dynamic profile use the demux0 interface.[edit dynamic-profiles DHCP-IP-Demux]user@host# edit interfaces demux0
- Specify that the dynamic profile apply the interface unit
value to the dynamic IP demux interfaces.[edit dynamic-profiles DHCP-IP-Demux interfaces demux0]user@host# edit unit $junos-interface-unit
- (Optional) Configure the router to respond to any ARP
request, as long as the router has an active route to the target address
of the ARP request.[edit dynamic-profiles DHCP-IP-Demux interfaces demux0 unit “$junos-interface-unit”]user@host# set proxy-arp
- Specify the logical underlying interface for the dynamic
IP demux interfaces.[edit dynamic-profiles DHCP-IP-Demux interfaces demux0 unit “$junos-interface-unit”]user@host# set demux-options underlying-interface $junos-underlying-interface
- Specify the protocol family information for the dynamic
IP demux interfaces.[edit dynamic-profiles DHCP-IP-Demux interfaces demux0 unit “$junos-interface-unit”]user@host# edit family inet
- Specify the demux source address is obtained from the
incoming subscriber IP address.[edit dynamic-profiles DHCP-IP-Demux interfaces demux0 unit “$junos-interface-unit” family inet]user@host# set demux-source $junos-subscriber-ip-address
- Specify the loopback interface as the unnumbered address
and the demux interface IP address as the preferred source address
for the dynamic IP demux interfaces.[edit dynamic-profiles DHCP-IP-Demux interfaces demux0 unit “$junos-interface-unit” family inet]user@host# set unnumbered-address lo0.0 preferred-source-address 100.100.100.1
Verification
Subscriber Verification
Purpose
View subscriber information on the router.
Action
- To display dynamic subscriber information:user@host# show subscribers detail
Interface Verification
Purpose
View interface-specific information on the router.
Action
- To display interface-specific output:user@host# show interfaces interface-name
