The MPLS-OPS Archive

[Sidnie Feit <sfeit@vnet.net>]

If a packet arrives via Ethernet, the Ethertype field will
indicate that an MPLS label follows.

If the packet arrives across a PPP link, the PPP protocol field
will indicate that an MPLS label follows.

Also keep in mind that Frame Relay and ATM switches
participate in MPLS. In these cases, the Frame Relay DLCI
or ATM VPI/VCI is used as the label. The fact that these
labels are established via MPLS label distribution
signaling is irrelevant at execution time, when traffic is being
forwarded.

Sidnie Feit

At 03:04 AM 3/22/2001 -0800, you wrote:

>Hi,
>    I have question.
>When a packet comes into a router supporting both
>MPLS and conventional IP forwarding,on processing,
>will the IP address be looked at first?Or the presence
>of a label is checked first?
>     In both cases,doesn't this add to the processing
>delay and thus decreases the efficiency of the
>forwarding paradigm provided by MPLS?
>
>   Thanks
>
>
>
>
>__________________________________________________
>Do You Yahoo!?
>Get email at your own domain with Yahoo! Mail.
>http://personal.mail.yahoo.com/
>
>-------
>The MPLS-OPS Mailing List
>Subscribe/Unsubscribe:  http://www.mplsrc.com/mplsops.shtml
>Archive: http://www.mplsrc.com/mpls-ops_archive.shtml

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