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Re: Fwd: FW: How to Differentiate Traffic ?

  • From: Robert Raszuk <raszuk@cisco.com>
  • Date: Wed, 28 Nov 2001 18:28:49 +0100
  • CC: ccasey@bigfoot.com, "Chris C.," <theguber@hotmail.com>, mpls-ops@mplsrc.com
  • Organization: Signature: http://www.employees.org/~raszuk/sig/
  • Resent-Date: Wed, 28 Nov 2001 14:50:14 -0500
  • To: krishnak@sify.com

KK,

> I wish there could be a way you can control the traffic on the physical interface of PE itself. Along with the command "ip vrf forwarding VPN1", some ACL, or route-map or some thing could have been provided.

Ok since you said it let me bring one way of doing it :). Yes we still
don't support regular PBR in the vrf. On the other hand without touching
CE you may configure a static route for any dst back to some other
logical interface out of given vrf. That other logical interface may go
to other vrf or to a global table of your PE. I believe that would solve
your question as well as Chris need. 

Of course you need to also let the global RIB know about dst behind the
vrf. For now in cisco the only way to do it via static but we have in
our developemnt queue the way to make this vrf2global learning dynamic.

R.

> krishnak@sify.com wrote:
> 
> Hi Robert,
> 
> I agree with Chris in this case, with MPLS, what customer sees is a low end very simple CPE router. As a service provider, we too don't want much complexity and control on customer end routers. Also, there could be cases, where cusotmer end router does not support FR, or tunnel or what ever. (As far as I know, GRE tunnel on Cisco is not compatible with other vendor routers).
> 
> I wish there could be a way you can control the traffic on the physical interface of PE itself. Along with the command "ip vrf forwarding VPN1", some ACL, or route-map or some thing could have been provided.
> 
> Regards,
> KK
> 
>  "Chris C.," <theguber@hotmail.com>:
> 
> > 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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