The MPLS-OPS Archive

[Stefan Oettl <soettl@freenet.de>]

what kind of PE boxes do you use ?
in case of Cisco's you could configure a backup PE-PE or PE-NAS (NAS will need 
MPLS then) GRE tunnel for label switching.
As far as I know MPLS forwarding on (DDR) ISDN / Dialer interfaces isn't 
supported directly in IOS up to know. Please someone correct me if I'm wrong 
here ...
So you could use GRE encapsulation to tunnel the MPLS frames over the 
non-supported circuit.

cheers,
Stefan

On Tuesday 10 September 2002 11:08, Saifulazza wrote:
> Hi
>
> Has anybody out  have implemented the PE-PE connection  being backup by
> ISDN PRI ? . I experienced very unstable connection with the OSPF adjacency
> flapping most of the time and the VPN can never be developed .
>
> Cheers
>
>
>
> -----Original Message-----
> From: fraanro [mailto:fraanro@arrakis.es]
> Sent: Tuesday, September 10, 2002 4:02 PM
> To: Enrique Torres
> Cc: mpls-ops@mplsrc.com
> Subject: Re: [MPLS-OPS]: tag-switching MTU on c7206 and c3640
>
>
> You should configure the tagswitching MTU in the Fast Ethernet
> interfaces to be able to hold the MPLS frame with as many shim headers
> as you need. for example 1508 if you want to labels.
>
> mpls mtu 1508
>
> under the interface configuration.
>
> Rgds.
> Javier.
>
> ----- Mensaje Original -----
> Remitente: Enrique Torres <entorresa@yahoo.com>
> Fecha: Lunes, Septiembre 9, 2002 8:28 pm
> Asunto: [MPLS-OPS]: tag-switching MTU on c7206 and c3640
>
> > Hi all
> >
> > I started tag-switching between 2 nodes of my network
> > but there is a problem with the MTU and the packet
> > size after tag imposition.
> >
> > My configuration in each node is it
> >
> > I have a Cisco7206 (IOS 12.1(1)E), it is connected
> > with 6 Cisco 3640 (remote cells) through E1 circuits.
> > Between the C3640 and C7206 I run tag switching
> > because I have configured VPN's. In all these routers
> > is configured "Path MTU Discovery" and our MTU between
> > the c3640 and c7206 is 1530.
> >
> > In this configuration I dont have any problem to send
> > information between clients connected in our c3640's.
> >
> > But when I connect this node with a second node, I
> > must connect the c7206 through a fast ethernet port
> > and run tag-switching over these ports. In this
> > situation I started to have problems with http, ftp or
> > any kind of traffic with large size of packet (greater
> > than 1500bytes).
> >
> > I believe that I have a problem with the MTU after
> > second tag imposition (the impositon between c7206's)
> >
> > Please, could you help me to solve this.
> >
> > Thanks,
> >       Enrique.
> >
> >
> >
> > =====
> > Saludos,
> >       Enrique
> >
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