The MPLS-OPS Archive

[Karl Garcia <Karl.Garcia@cosinecom.com>]

Title: RE: Fwd: FW: How to Differentiate Traffic ?

Just to throw another perspective into the fray, there is equipment available
today that will allow the decision about when to leave the private network to
be made at the provider's site.  Essentially this turns the VRF into a real
router, rather than just a entry into the MPLS core.  You would probably
need some kind of firewall at the egress point too.  All this functionality
can be provided by one device.

Designed this way, the CPE could be anything from a full router to just a DSL line.
No provider management necessary at all.  And this would eliminate the
need for special GRE or VLAN configuration (and overhead !!) too.

___________
Karl

Karl Garcia
Sr. Mrkt. Engr.
CoSine Communications, Inc. 
www.cosinecom.com

-----Original Message-----
From: Chris C., [mailto:theguber@hotmail.com]
Sent: Wednesday, November 28, 2001 2:41 AM
To: raszuk@cisco.com
Cc: mpls-ops@mplsrc.com
Subject: Re: Fwd: FW: How to Differentiate Traffic ?

Robert,

Let me clarify a little. This is for a service Providers network. Let me
make some comments below:

> >
> > 1. You have a CPE that does not support this? Like a DSL Bridge as an
> > example.
>
>I am surprise that you would connect DSL bridge directly into the PE.
>Usually it goes to NAS then via some L2 encapsulation (for example l2tp)
>to PEs.
>

Chris>> Need cheap CPE devices. The above was just one example. DSL bridge
through a DSLAM using a Bridge Group at the PE with DHCP for IP Addressing
so that telecommuters for an enterprise can get the same IP address wherther
they are at work or at home or a SOHO office. IE: The DHCP server for that
particular user is the actual enterprises Server

> > 2. You do not have a CPE. EG: Ethernet port off a L2 LAN Switch in a MTU
> > model.
>
>Well most ethernet switches support VLANs. That's all what you need.
>Also linux supports both GRE and vlans so you can easily use this as
>solution as well.

Chris>> Does not seem practical. Are you saying put a LINUX WS at each site?
That eliminates the cost advantage of using Ethernet then doesn't it?? Also
in the VLAN scenario would that not mean the clients Internet traffic could
route back to the VPN path? (Note: If the client did nothing about it and
was outsourcing the service to us the SP)

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