[ovs-discuss] How to support traceroute using OVS

[Ben Pfaff]

On Wed, Dec 02, 2015 at 09:21:14AM +0000, Chao Hu wrote:
> [CH] we want to support traceroute for both IP and MPLS
> cases. Actually there's another issue here that when push mpls label,
> its TTL is copied from the IP TTL, but when pop mpls label, now seems
> there's no way to copy mpls TTL back to IP TTL. I think it'll be
> useful if provide a load action for TTL field. Then the
> user/controller can decide whether to copy TTL back or not.

You mean, to add support for the MPLS TTL field?  That wouldn't be too
hard to implement; feel free to submit a patch.