Example: Configuring a Static Subscriber Interface on an IP Demux Interface over Aggregated Ethernet

This example shows how you can configure a subscriber interface using a static IP demultiplexing (demux) interface stacked on a two-link aggregated Ethernet logical interface. In this example, the underlying aggregated Ethernet logical interface is configured for one-to-one active/backup redundancy at the DPC level.

1. Define the number of aggregated Ethernet interfaces on the router.

   In this example, only one aggregated Ethernet logical interface is configured on the router:

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   chassis {
       aggregated-devices {
           ethernet {
               device-count 1;
           }
       }
   }
   

2. Configure ae0, a two-link aggregated Ethernet logical interface to serve as the underlying interface for the static IP 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 DPC level, the LAG bundle attaches ports from two different EQ DPCs.

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   interfaces {
       ge-5/0/3 {
           gigether-options {
               802.3ad {
                   ae0;
                   primary;
               }
           }
       }
       ge-5/1/2 {
           gigether-options {
               802.3ad {
                   ae0;
                   backup;
               }
           }
       }
   }
   

3. Configure the aggregated Ethernet logical interface with link protection enabled, and specify the logical demultiplexing source family type for both the active and backup links.

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   interfaces {
       ae0 {
           aggregated-ether-options {
               link-protection;
               minimum-links 1;
               link-speed 1g;
           }
           unit 0 {
               demux-source inet {
               family inet {
                   address 203.0.113.110/24;
               }
           }
           unit 1 {
               demux-source inet {
               family inet {
                   address  203.0.113.111/24;
               }
           }
       }
   }
   

4. Configure the IP demux interface over the aggregated Ethernet logical interface.

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   interfaces {
       demux0 {
           unit 101 {
               demux-options {
                   underlying-interface ae0.0;
               }
               family inet {
                   demux-source 203.0.113.100/16;
                   address 203.0.113.0/24;
               }
           }
           unit 101 {
               demux-options {
                   underlying-interface ae0.1;
               }
               family inet {
                   demux-source 203.0.113.221/16;
                   address 203.0.113.0/24;
               }
           }
       }
   }