Hot Downloads



The forum is in read only mode.
Welcome, Guest
Username: Password: Remember me
  • Page:
  • 1

TOPIC: Packets between DSLAM and BRAS

Packets between DSLAM and BRAS 9 years 11 months ago #29922

Hi All,

I am trying to understand what type of packets move between a DSLAM and BRAS.

I have read the sticky "DSLAM basics" which gives great insight, but still leaves some questions unanswered for me.

ATM DSLAMs send ATM cells between DSLAM and BRAS (no surprises here)
Ethernet DLSAMs send ethernet Frames between DLSLAM and BRAS which means all IP and PPP traffic go over ethernet (no surprises here)
IP DSLAMs - this is where I am still a little confused so this is where my quesions start.

1. What I'm trying to figure out is, are IPDSLAM pure IP therefore backhaul between DSLAM and BRAS can be sent over a pure IP solution that does not support Layer 2 traffic.

2. On a IPDSLAM does only IP traffic pass b/w DSLAM and BRAS or are there also layer 2 services being provided

3. For IPDSLAM what happens to PPPoE traffic, does the DSLAM act as a proxy and forward the PPPoE traffic via IP to BRAS.
  • Page:
  • 1
Time to create page: 0.094 seconds


Cisco Routers

  • SSL WebVPN
  • Securing Routers
  • Policy Based Routing
  • Router on-a-Stick

VPN Security

  • Understand DMVPN
  • GRE/IPSec Configuration
  • Site-to-Site IPSec VPN
  • IPSec Modes

Cisco Help

  • VPN Client Windows 8
  • VPN Client Windows 7
  • CCP Display Problem
  • Cisco Support App.

Windows 2012

  • New Features
  • Licensing
  • Hyper-V / VDI
  • Install Hyper-V


  • File Permissions
  • Webmin
  • Groups - Users
  • Samba Setup