Re: [net 1/2] selftests: seg6: disable DAD on IPv6 router cfg for srv6_end_dt4_l3vpn_test

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On 5/10/23 5:16 AM, Andrea Mayer wrote:
> The srv6_end_dt4_l3vpn_test instantiates a virtual network consisting of
> several routers (rt-1, rt-2) and hosts.
> When the IPv6 addresses of rt-{1,2} routers are configured, the Deduplicate
> Address Detection (DAD) kicks in when enabled in the Linux distros running
> the selftests. DAD is used to check whether an IPv6 address is already
> assigned in a network. Such a mechanism consists of sending an ICMPv6 Echo
> Request and waiting for a reply.
> As the DAD process could take too long to complete, it may cause the
> failing of some tests carried out by the srv6_end_dt4_l3vpn_test script.
> 
> To make the srv6_end_dt4_l3vpn_test more robust, we disable DAD on routers
> since we configure the virtual network manually and do not need any address
> deduplication mechanism at all.
> 
> Fixes: 2195444e09b4 ("selftests: add selftest for the SRv6 End.DT4 behavior")
> Signed-off-by: Andrea Mayer <andrea.mayer@xxxxxxxxxxx>
> ---
>  tools/testing/selftests/net/srv6_end_dt4_l3vpn_test.sh | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 

Reviewed-by: David Ahern <dsahern@xxxxxxxxxx>





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