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Date:   Fri, 17 Jan 2020 14:58:45 +0100
From:   Matteo Croce <>
To:     Jeremy Harris <>
Cc:     netdev <>
Subject: Re: [PATCH net-next v3] openvswitch: add TTL decrement action

On Fri, Jan 17, 2020 at 2:44 PM Jeremy Harris <> wrote:
> On 15/01/2020 16:40, Matteo Croce wrote:
> > New action to decrement TTL instead of setting it to a fixed value.
> > This action will decrement the TTL and, in case of expired TTL, drop it
> > or execute an action passed via a nested attribute.
> > The default TTL expired action is to drop the packet.
> On drop, will it emit an ICMP?
> --
> Cheers,
>   Jeremy

No, drop will silently drop it.

But if you add an action which sends the packet to userspace, the
controller can send an ICMP TTL exceeded response.

Matteo Croce
per aspera ad upstream

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