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Re: [bess] VXLAN EVPN fabric extension to Hypervisor VM

Jeff Tantsura <jefftant.ietf@gmail.com> Tue, 03 March 2020 00:58 UTC

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From: Jeff Tantsura <jefftant.ietf@gmail.com>
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Date: Mon, 02 Mar 2020 16:57:57 -0800
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Cc: Robert Raszuk <robert@raszuk.net>, BESS <bess@ietf.org>
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To: Gyan Mishra <hayabusagsm@gmail.com>
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Subject: Re: [bess] VXLAN EVPN fabric extension to Hypervisor VM
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Gyan,

On open source side of things - FRR supports EVPN on the host.
Any vendor virtualized NOS would provide you the same (at least Junos/cRPD or  XRv).
EVPN ESI load-sharing eliminates need for MLAG (basic thought, the devil is in the details :))
ECMP vs LAG load-balancing - the algorithms supported are quite similar, in some code bases actually the same, so this statement is not really correct.

Would be glad to better understand your requirements and help you!

Regards,
Jeff

> On Mar 2, 2020, at 16:00, Gyan Mishra <hayabusagsm@gmail.com> wrote:
> 
> 
> 
> Thanks Robert for the quick response
> 
> Just thinking out loud -  I can see there maybe some advantages of elimination of L2 to the host but the one major disadvantage is that BGP multipath provides flow based uneven load balancing so not as desirable from that standpoint compare to L3 MLAG bundle XOR Src/Dest/Port hash.
> 
> Other big down side is most enterprises have the hypervisor managed by server admins but if you run BGP now that ends up shifting to network.  More complicated.  
> 
> Kind regards
> 
> Gyan
> 
>> On Mon, Mar 2, 2020 at 6:39 PM Robert Raszuk <robert@raszuk.net> wrote:
>> Hi Gyan,
>> 
>> Similar architecture has been invented and shipped by Contrail team. Now that project after they got acquired by Juniper has been renamed to Tungsten Fabric https://tungsten.io/ while Juniper continued to keep the original project's name and commercial flavor of it. No guarantees of any product quality at this point. 
>> 
>> Btw ,,, no need for VXLAN nor BGP to the host. The proposed above alternative were well thought out and turned to work ways far more efficient and practical if you zoom into details. 
>> 
>> Best,
>> Robert.
>> 
>> 
>>> On Tue, Mar 3, 2020 at 12:26 AM Gyan Mishra <hayabusagsm@gmail.com> wrote:
>> 
>>> 
>>> Dear BESS WG
>>> 
>>> Is anyone aware of any IETF BGP development in the Data Center arena to extend BGP VXLAN EVPN to a blade server Hypervisor making the Hypervisor part of the  vxlan fabric.  This could eliminate use of MLAG on the leaf switches and eliminate L2 completely from the vxlan fabric thereby maximizing  stability.
>>> 
>>> Kind regards,
>>> 
>>> Gyan
>>> -- 
>>> Gyan  Mishra
>>> 
>>> Network Engineering & Technology 
>>> 
>>> Verizon 
>>> 
>>> Silver Spring, MD 20904
>>> 
>>> Phone: 301 502-1347
>>> 
>>> Email: gyan.s..mishra@verizon.com
>>> 
>>> 
>>> 
>>> 
>> 
>>> _______________________________________________
>>> BESS mailing list
>>> BESS@ietf.org
>>> https://www.ietf.org/mailman/listinfo/bess
> -- 
> Gyan  Mishra
> 
> Network Engineering & Technology 
> 
> Verizon 
> 
> Silver Spring, MD 20904
> 
> Phone: 301 502-1347
> 
> Email: gyan.s.mishra@verizon.com
> 
> 
> 
> 
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
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