ge-0/0/14 must be configured to trunk “all” vlans,.
Double-tagged frames can then egress via ge-0/0/14 towards MX-1.Any frames arriving on xe-0/0/16 with C-VLAN tags within the range of 100-4000 has an additional S-VLAN tag of 10, pushed onto it.This snippet of configuration does a couple of basic things: If we take a look at the VLAN and interface configuration of the EX-4500, it’s relatively straightforward: This approach allows for a high degree of scale, as you can encapsulate 4096 C-TAGs inside 4096 S-TAGs (basically you can have 16777216 customers in theory).Inner VLAN or C-TAG = to mark frames coming from each subscriber.Outer VLAN or S-TAG = to mark frames coming from the EX-4500.The EX-4500 pushes an “S-VLAN” onto all subscriber traffic, so frames heading towards the BNG are double-tagged, or “QinQ’d”.Each individual subscriber is assigned their own VLAN, can be imposed on the port, or the subscriber CPE can send tagged-frames,.For Broadband subscribers, I’m lucky to have access to an IXIA XG12 testerīefore we get to the BNG side of things, lets take a look at the access network (EX-4500) essentially, this switch is doing several things:.RADIUS is an Ubuntu server running FreeRadius (explained in more detail later).EX-4500 is self explanatory, and is basically doing QinQ towards the BNG.MX-2 is also an MX-5 is a generic PE with simulated external connectivity.MX-1 is a Juniper MX-5 router, acting as the BRAS or BNG.Many years ago I worked on large-scale Cisco platform terminating DSL business broadband users on Cisco 7200s over ATM, recently I’ve been involved in a couple of jobs where FTTC users are being terminated on Juniper MX480 routers, using double-tagging and PPPoE, this first post looks into how to setup a Juniper MX router from scratch and terminate PPPoE subscribers authenticated by RADIUS (in this case FreeRadius) MX DPC/MPC Troubleshooting Subroutine (called from Resolution Guide - Troubleshoot Fabric Plane)Ģ1.2R2-S2: Software Release Notification for JUNOS Software Version 21.Quite often on my travels I sometimes encounter technologies I worked on a long time ago that I seem to bump into again later in life, in this case it’s terminating broadband subscribers. Meaning of SLCHIP(0): 1 new SLin XIF ins eope errors Unable to pass traffic between SSG and M7 router when configured for Multilink PPP
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