netdev - Re: [patch net-next] mlxsw: spectrum_switchdev: Allow port enslavement to a VLAN-unaware bridge

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Date:   Wed, 21 Feb 2018 12:41:39 -0700
From:   David Ahern <dsahern@...il.com>
To:     Ido Schimmel <idosch@...sch.org>
Cc:     Jiri Pirko <jiri@...nulli.us>, netdev@...r.kernel.org,
        davem@...emloft.net, idosch@...lanox.com, mlxsw@...lanox.com
Subject: Re: [patch net-next] mlxsw: spectrum_switchdev: Allow port
 enslavement to a VLAN-unaware bridge

On 2/21/18 12:25 PM, Ido Schimmel wrote:
>>
>> and can talk to the hosts:
>> # ping6 ff02::2%br0
> 
> Can you try ff02::1 ?

same result.

> 
>> PING ff02::2%br0(ff02::2) 56 data bytes
>> 64 bytes from fe80::7efe:90ff:fee8:3a79: icmp_seq=1 ttl=64 time=0.073 ms
>> 64 bytes from fe80::202:ff:fe00:2: icmp_seq=1 ttl=64 time=0.661 ms (DUP!)
>> 64 bytes from fe80::202:ff:fe00:5: icmp_seq=1 ttl=64 time=0.705 ms (DUP!)
>> 64 bytes from fe80::202:ff:fe00:1: icmp_seq=1 ttl=64 time=0.720 ms (DUP!)
>> 64 bytes from fe80::202:ff:fe00:3: icmp_seq=1 ttl=64 time=0.729 ms (DUP!)
>> 64 bytes from fe80::202:ff:fe00:6: icmp_seq=1 ttl=64 time=0.739 ms (DUP!)
>> 64 bytes from fe80::202:ff:fe00:4: icmp_seq=1 ttl=64 time=0.748 ms (DUP!)
>> 64 bytes from fe80::202:ff:fe00:7: icmp_seq=1 ttl=64 time=0.757 ms (DUP!)
>> 64 bytes from fe80::202:ff:fe00:8: icmp_seq=1 ttl=64 time=0.766 ms (DUP!)
>>
>> but the hosts can not talk to each other:
>>
>> cumulus@...t3:~$ net show lldp
>>
>> LocalPort  Speed  Mode          RemoteHost   RemotePort
>> ---------  -----  ------------  -----------  ----------
>> swp1       10G    Interface/L3  mlx-2700-05  swp1s2
>>
>> cumulus@...t3:~$ ping6 3000:1000:1000:1000::2
>> PING 3000:1000:1000:1000::2(3000:1000:1000:1000::2) 56 data bytes
>> ^C
>> --- 3000:1000:1000:1000::2 ping statistics ---
>> 3 packets transmitted, 0 received, 100% packet loss, time 1999ms
> 
> Can you please try
> 
> # brctl showstp br0
> 
> To make sure STP state is set to forwarding?

it is.

> 
> Does it matter if you try IPv4 ping or if vlan_filtering is set 1?
> Unfortunately, I can't reproduce on my switch.

Bring up the hosts and then reboot the switch. At that point I get no
host to host communication. As soon as I flap the port on host1 host3 to
host1 starts working.

So it seems to be something about the initial boot state.