[c-nsp] 3750 Metro MPLS

[David Prall]

Sounds like you tried to configure tunnel keys or 2 tunnels with the same
source address. The 6500 requires that an interface be dedicated as a tunnel
source in order to be hw switched. The hardware also doesn't support tunnel
keys, which is required when you are configuring 2 tunnels between the same
devices using the same source/destination pairs.

http://www.cisco.com/univercd/cc/td/doc/product/metro/me6500/122zu/sg/intro.
htm
The PFC3C does not provide hardware acceleration for tunnels configured with
the tunnel key command.

GRE Tunneling and IP in IP Tunneling-The PFC3C supports the following tunnel
commands: 
tunnel destination
tunnel mode gre
tunnel mode ipip
tunnel source
tunnel ttl
tunnel tos

--
http://dcp.dcptech.com
  

> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net 
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Justin Shore
> Sent: Tuesday, September 18, 2007 8:05 AM
> To: Phil Mayers
> Cc: Munroe, James (DSS/MAS); Chris Lane; cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] 3750 Metro MPLS
> 
> Phil Mayers wrote:
> > On Mon, 2007-09-17 at 22:47 -0500, Justin Shore wrote:
> >> I've got a pair of each.  The ME6524 has been a pretty 
> good router for 
> >> us so far, other than the lack of L2TP support and no GRE 
> in hardware. 
> > 
> > Interesting. The sup720 does GRE in hardware, modulo a few 
> limitations.
> > Why doesn't the 6524?
> 
> That's a good question.  It was a very silly situation that I 
> was trying 
> to work around with GRE, L2TP and even AToM.  IIRC L2TP 
> wasn't supported 
> at all and the RP told me that the GRE tunnel would be handled in 
> software upon creating the tunnel interface.  AToM wouldn't 
> work because 
> I couldn't get the IGP and LDP up and running underneath it prior to 
> bringing up AToM.  I was trying to tunnel across hardware that was 
> stripping out IS-IS.  Lots of fun...
> 
> Justin
> 
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