Re: [PATCH net] selftest/net: skip srv6_end_d[t/x][4/6]_*_test.sh if iproute2 too old

[Alessio Faina <alessio.faina@canonical.com>]

On Wed, Aug 26, 2026 at 12:01:56AM +0200, Andrea Mayer wrote:
> On Mon, 24 Aug 2026 11:15:37 +0200
> Alessio Faina <alessio.faina@canonical.com> wrote:
> 
> Hi Alessio,
> 
> Thanks for the patch.
> 
> > In case iproute2 is older than version 5.14.0, released ~Sept 1, 2021,
> > the End.DT4/DT6/DX4/DX6 support are not available and the tests
> > contained in the following 4 test files
> >  - srv6_end_dt4_l3vpn_test.sh
> >  - srv6_end_dt6_l3vpn_test.sh
> >  - srv6_end_dx4_netfilter_test.sh
> >  - srv6_end_dx6_netfilter_test.sh
> > are failing in some kernel backports.
> > This is the result of one those tests in an unsupported environment:
> > 
> > \################################################################################
> > \TEST SECTION: SRv6 VPN connectivity test among hosts in the same tenant
> > \################################################################################
> > \
> > \    TEST: Hosts connectivity: hs-t100-1 -> hs-t100-2 (tenant 100)       [FAIL]
> > \
> > \    TEST: Hosts connectivity: hs-t100-2 -> hs-t100-1 (tenant 100)       [FAIL]
> > \
> > \    TEST: Hosts connectivity: hs-t200-3 -> hs-t200-4 (tenant 200)       [FAIL]
> > \
> > \    TEST: Hosts connectivity: hs-t200-4 -> hs-t200-3 (tenant 200)       [FAIL]
> > \
> > 
> > To amend this, check the current running iproute2 supports the required
> > feature and, if not, just skip the entire test to avoid a failure.
> > 
> 
> Which kernel were you running when you saw these failures?
> 
> Did the ip route add commands that install the seg6local routes fail
> there, and if so, with which error?
> 
> Ciao
> Andrea

Hi Andrea,

I was running kernel 5.15 (5.15.0-139-generic).

Removing the sink to /dev/null in check_hs_connectivity
I can see the following error:

------------
PING 10.0.0.2 (10.0.0.2) 56(84) bytes of data.

--- 10.0.0.2 ping statistics ---
1 packets transmitted, 0 received, 100% packet loss, time 0ms

    TEST: Hosts connectivity: hs-t100-1 -> hs-t100-2 (tenant 100)       [FAIL]

.....
------------

The error I can see upon installing the route in the setup is the
following:

------------
Error: either "to" is duplicate, or "vrftable" is a garbage.
------------

I can see that iproute2 doesn't support any End routes

------------
~$ ip route help 2>&1 | grep -qo "End"
~$ echo $?
1
------------

It's similar to the case we added last month(-ish) for
srv6_end_dt46_l3vpn_test.sh.
I just didn't realise at the time that there were standalone 4 and 6
test cases as well, or I would have added those checks at the same time.

Kind regards,
    -Alessio
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