Re: Arista MLAG to Cisco 6500 VSS [ LACP Issue ]

Agree that's what I've been suggesting too in below, not much on google about
whether the Arista will MLAG with a Cisco, have you seen it working Brian?

Here's a snippet from Ethan Banks post on packet pushers

Multichassis etherchannel. Spreading an LACP link across two switches does
allow for forwarding on all interswitch links, but itbs not a topological
bany-anyb. In addition, vendorsb MEC solutions are not interoperable.
You canbt take an Arista switch, mate it to a Cisco switch, and present a
unified MEC uplink to an adjacent node. Examples of MEC include Ciscobs
Nexus virtual port channel (vPC) and Aristabs multichassis link aggregation
(MLAG).
Not an RFC but if you've got this working then all good

--
BR
Tony
Sent from my iPad
> On 6 Mar 2014, at 00:36, Brian McGahan <bmcgahan_at_ine.com> wrote:
>
> The Arista side must be misconfigured. It's behaving as a regular LAG not an
MLAG.
>
> Arista MLAG is like Nexus vPC, where there are two control planes &
management planes that sync over a control plane peer-link. To allow for this
they have to spoof a shared LACP system-ID.
>
> The log on the Catalyst side means that the Aristas have 2 LACP IDs, which
means its MLAG is broken for some reason.
>
>
>
> Brian McGahan, 4 x CCIE #8593 (R&S/SP/SC/DC), CCDE #2013::13
> bmcgahan_at_INE.com
>
> Internetwork Expert, Inc.
> http://www.INE.com
>
>> On Mar 5, 2014, at 5:44 PM, "Tony Singh" <mothafungla_at_gmail.com> wrote:
>>
>> to add
>>
>> When regular port-channel config is added on the 6500 and you have
different ports added on both chassis the VSS will pick this up as a MEC
(multi ether-channel chassis)
>>
>> It's seems it's seeing multiple macs or system-id's via the MLAG ports on
the Arista
>>
>> Depends on how Arista encode the frames, I don't think MLAG or MEC are RFC
compliant even if LACP is
>>
>> Where you could get Arista nodes communicating using MLAG
>>
>> --
>> BR
>>
>> Tony
>>
>> Sent from my iPad
>>
>>> On 5 Mar 2014, at 21:32, Cristian Matei <cmatei_at_ine.com> wrote:
>>>
>>> I say it should work, is MLAG correctly configured on Arista; if so, all
>>> ports in the ether channel towards VSS should use the same system-id?
What
>>> does B3show ether channel summaryB2 show on VSS?
>>> Regards,
>>> Cristian.
>>>
>>>> On 05/03/14 23:15, "Tony Singh" <mothafungla_at_gmail.com> wrote:
>>>>
>>>> In the system-id negotiated in your LACP frames your multi chassis lag
>>>> has a different base mac-address per unit
>>>>
>>>> Hence no LACP
>>>>
>>>> Had the same issue between a Cisco ASA pair going to a stackable switch,
>>>> it can't be done from what I've seen
>>>>
>>>> Maybe someone will override me
>>>>
>>>> --
>>>> BR
>>>>
>>>> Tony
>>>>
>>>> Sent from my iPad
>>>>
>>>>> On 5 Mar 2014, at 12:53, Taufik Kurniawan <ktaufik_at_gmail.com> wrote:
>>>>>
>>>>> Dear All,
>>>>>
>>>>> Does anyone here has an experience to connect an arista pair (MLAG)
>>>>> with a pair of 6500 (VSS).
>>>>>
>>>>> We are trying this, but a pair of 6500 (VSS) complaining below messages
>>>>> :
>>>>>
>>>>> Feb 27 20:05:13.351: %LACP-SW1-4-MULTIPLE_NEIGHBORS: Multiple
>>>>> neighbors detected on Te1/1/1: new neighbor(sys-mac-id:
>>>>> 001c.7318.b7e0, port: 0x29), old neighbor(sys-mac-id: 021c.7318.b7e0,
>>>>> port: 0x29)
>>>>>
>>>>> Feb 27 20:05:14.211: %LACP-SW1-4-MULTIPLE_NEIGHBORS: Multiple
>>>>> neighbors detected on Te2/1/8: new neighbor(sys-mac-id:
>>>>> 001c.7318.ba32, port: 0x802A), old neighbor(sys-mac-id:
>>>>> 021c.7318.b7e0, port: 0x802A)
>>>>>
>>>>>
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