netdev - Re: support for popping multiple MPLS labels with iproute2?

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Message-ID: <b1455c03-d98c-c08b-a6f3-330d9f36d8be@gmail.com>
Date:   Fri, 31 May 2019 15:56:47 -0600
From:   David Ahern <dsahern@...il.com>
To:     Alan Maguire <alan.maguire@...cle.com>, netdev@...r.kernel.org
Subject: Re: support for popping multiple MPLS labels with iproute2?

On 5/31/19 6:24 AM, Alan Maguire wrote:
> I was wondering if there is a way to pop multiple MPLS labels at
> once for local delivery using iproute2?
> 
> Adding multiple labels for encapsulation is supported via
> label1/label2/... syntax, but I can't find a way to do the same
> for popping multiple labels for local delivery.
> 
> For example if I run
> 
> # ip route add 192.168.1.0/24 encap mpls 100/200 via inet 192.168.1.101 \
>    dev mytun mtu 1450
> 
> ...I'm looking for the equivalent command to pop both labels on the
> target system for local delivery; something like
> 
> # ip -f mpls route add 100/200 dev lo
> 
> ...but that gets rejected as only a single label is expected.
> 

as I recall the kernel driver only pops one and does a look for it.

Try:

ip -f mpls route add 100 dev lo
ip -f mpls route add 200 dev lo