Subject: RE: Label Detection

From: Shahram Davari <[email-masked]>
Date: Wed, 17 Nov 1999 11:32:56 -0800

Hi,

You have a field called "Ethertype" in the Ethenet header. As far as I
remember it is "x8847 and x8848" for unicast and multicast MPLS
respectively. For 802.3, which has no "Ethertype" field, an extra SNAP
encapsulation is needed.

Cheers,
Shahram

> -----Original Message-----
> From: [email-masked] [mailto:[email-masked]]
> Sent: Tuesday, November 16, 1999 7:31 PM
> To: [email-masked]
> Subject: Label Detection
> 
> 
> 
> 
> 
> Hi All,
> In case of MPLS over ethernet, we add a shim header between 
> l2 and l3 header
> right. I wanted to know how does a Label Switching Router 
> know if it is a
> Labeled packet or not
> 
> regs,
> Ravi Singh.
> 
>