[OpenIndiana-discuss] LACP between OpenIndiana and a Cisco C3560: only some traffic passes.

[Udo Grabowski (IMK)]

On 10/09/2013 10:14, Antony Brooke-Wood wrote:
> I am running OpenIndiana (oi_151a8) and have two NICs aggregated using LACP
> connected to a Cisco WS-C3560G-48TS. Both the server and the switch show
> the aggregate link as up. But while link layer traffic is visible ('snoop'
> shows ARP requests etc), I can not pass any IP traffic (ping, ssh all
> fail). The really strange thing is that the aggregate link can obtain a
> DHCP address, which provides the correct gateway etc. My initial thoughts
> were that there was a problem with the VLAN configuration, but the switch
> is running everything on VLAN1. I also tried explicitly adding this on both
> ends, but without success (OI won't let me configure a VLAN with the native
> VLAN). Any ideas?
>

The switch should have its ports also in a LACP group, and this
group should be VLAN access, not a trunk port, otherwise you have
to create a vlan aggr on your host also (which makes no real sense
if you only access this subnet on the host). You may also set the
policy to all layers (-P L2,L3,L4), LACPDU speed should match. We
usually prefer to set the switch to passive and host to active
mode:

interface GigabitEthernet0/14
  switchport access vlan yyyy
  switchport mode access
  channel-group 10 mode passive

If you see

switchport trunk encapsulation dot1q
switchport trunk allowed vlan yyyy
switchport mode trunk

you have a trunk port, not an access port.

Port: Gi0/14
------------

Port state    = Up Mstr Assoc In-Bndl
Channel group = 10          Mode = Passive         Gcchange = -
Port-channel  = Po10        GC   =   -             Pseudo port-channel = Po10
Port index    = 0           Load = 0x00            Protocol =   LACP

Flags:  S - Device is sending Slow LACPDUs   F - Device is sending fast LACPDUs.
         A - Device is in active mode.        P - Device is in passive mode.

Local information:
                             LACP port     Admin     Oper    Port        Port
Port      Flags   State     Priority      Key       Key     Number      State
Gi0/14    SP      bndl      32768         0xA       0xA     0xE         0x3C

Partner's information:

                   LACP port                        Admin  Oper   Port    Port
Port      Flags   Priority  Dev ID          Age    key    Key    Number  State
Gi0/14    SA      4096      0014.4f01.ddd2  28s    0x0    0x3E9  0x4     0x3D

Age of the port in the current state: 692d:17h:49m:29s


-- 
Dr.Udo Grabowski    Inst.f.Meteorology a.Climate Research IMK-ASF-SAT
www.imk-asf.kit.edu/english/sat.php
KIT - Karlsruhe Institute of Technology            http://www.kit.edu
Postfach 3640,76021 Karlsruhe,Germany  T:(+49)721 608-26026 F:-926026