The MPLS-OPS Archive

["Rajiv Asati \(rajiva\)" <rajiva@cisco.com>]

Amos meant this to be sent to everybody...
FYI..

> -----Original Message-----
> From: Amos Rosenboim [mailto:r.amos@zahav.net.il] 
> Sent: Wednesday, April 20, 2005 2:19 PM
> To: Rajiv Asati (rajiva)
> Subject: RE: [MPLS-OPS]: Tunneling MPLS over non-MPLS network
> 
> Garry,
> 
> Apart from products support perspective you have some operational
> factors to consider. 
> This kind of configuration forces you to have another layer of routing
> besides your normal IGP/BGP routing. 
> You need this layer to make sure that your mpls traffic stays 
> on the GRE
> tunnel and doesn't leak to the non mpls network underneath 
> it. Take for
> example a simple vpn between two PE routers, you need the two PE learn
> the source address of vpnv4 routes of each other through the 
> GRE tunnel.
> This usually involves either a lot of static routes or a lot of route
> filtering and most probably some of both.
> From my personal experience this is ok as long as it stays in a small
> scale, once it grows it becomes a nightmare to manage. 
> We have done this for several months (we bypassed a non mpls 
> core by GRE
> tunnels from one PE to the other) and at the end it wasn't 
> simple at all
> to manage and caused a lot of trouble.
> 
> Regards
> 
> Amos
> 
> 
> -----Original Message-----
> From: Rajiv Asati (rajiva) [mailto:rajiva@cisco.com] 
> Sent: Tuesday, April 19, 2005 2:46 PM
> To: Garry Glendown; mpls-ops@mplsrc.com
> Subject: RE: [MPLS-OPS]: Tunneling MPLS over non-MPLS network
> 
> Garry,
> 
> One alternative is to use GRE tunnel (enabled with MPLS).
> Depending upon the topology/requirement, the GRE tunnel could 
> be either
> PE-P or PE-PE.
> 
> Cheers,
> Rajiv 
> 
> > -----Original Message-----
> > From: Garry Glendown [mailto:garry@regio.net] 
> > Sent: Tuesday, April 19, 2005 3:10 AM
> > To: mpls-ops@mplsrc.com
> > Subject: [MPLS-OPS]: Tunneling MPLS over non-MPLS network
> > 
> > Hi,
> > 
> > I was wondering if there is a way to tunnel MPLS traffic over 
> > a non-MPLS
> > link? Hardware is Cisco routers, and link would have to 
> account for an
> > MTU for 1500 or possibly less ...
> > 
> > Any idea?
> > 
> > Tnx, -gg
> > 
> > -------
> > The MPLS-OPS Mailing List
> > Subscribe/Unsubscribe:  http://www.mplsrc.com/mplsops.shtml
> > Archive: http://www.mplsrc.com/mpls-ops_archive.shtml
> > 
> > MPLScon 2005 - May 16-19, NYC, NY
> > http://www.mplscon.com/
> > 
> 
> -------
> The MPLS-OPS Mailing List
> Subscribe/Unsubscribe:  http://www.mplsrc.com/mplsops.shtml
> Archive: http://www.mplsrc.com/mpls-ops_archive.shtml
> 
> MPLScon 2005 - May 16-19, NYC, NY
> http://www.mplscon.com/
> 

-------
The MPLS-OPS Mailing List
Subscribe/Unsubscribe:  http://www.mplsrc.com/mplsops.shtml
Archive: http://www.mplsrc.com/mpls-ops_archive.shtml

MPLScon 2005 - May 16-19, NYC, NY
http://www.mplscon.com/