On Wed, Mar 06, 2013 at 09:26:19AM -0800, Bruce Davie wrote:
> The processing for MPLS TTL is somewhat complex compared to IP,
> because there are a few different options for what is acceptable
> when pushing and popping labels. However, one thing that DOES carry
> forward straightforwardly from IP is that if the TTL reaches zero,
> the packet MUST be discarded. This is documented in RFC 1812,
> Section 5.3.
> 
> If you want to see all the gorey details about MPLS TTL processing,
> you need to read RFC 3443.

Thanks a lot, I sent out a fix:
http://openvswitch.org/pipermail/dev/2013-March/025853.html
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