[j-nsp] Segment Routing Real World Deployment (was: VPC mc-lag)

[Aaron Gould]

Sweet dreams Alexandre.... I can see you counting l2circuits now... I mean sheep... I mean l2circuits...

Aaron

> On Jul 7, 2018, at 4:10 PM, Alexandre Guimaraes <alexandre.guimaraes at ascenty.com> wrote:
> 
> Saku,
> 
> Indeed. iBGP will be redundant and resilient, yes... with a cost, 90 seconds (timers) of unavailability and more 1-3 minutes to get back online. I know, we can change timers, bfd and so on...  
> 
> I used that before... but....
> 
> Not everyone have MX960, MX480 handling BGP in every part of the network, I don’t have...  I have QFX, hundreds of them. Now imagine in some MX, you have 5/6 full routing table coming from upstream or peerings partners. Now experience a flap between two of those MX exchanging full routing table for a entire night....
> At some point, routing engines become angry and stop updating routes(normally, MX have a baaad routing update rate). Doomsday have arrived! 
> 
> Everyone gets crazy, angry customers blaming, services inside vpls, vpls getting loss bla bla bla....
> 
> Degraded fibers keep flapping lights on/off less than 30/90 seconds, no iBGP alarms. No one knows what’s going on...
> 
> As I said: VPLS save me from the dark(another Operation History: Once Upon time: we used Portugal Telecom IP/MPLS solution), Now L2circuits now enlightened my days. I can sleep!
> 
> By the way, I still using VPLS/iBGP for point multipoint services.  
> 
> att
> Alexandre
> 
> Em 7 de jul de 2018, à(s) 17:16, Mark Tinka <mark.tinka at seacom.mu> escreveu:
> 
>> 
>> 
>>> On 7/Jul/18 18:03, Alexandre Guimaraes wrote:
>>> 
>>> Yes! But... Ex4550 we have 32 ports 1/10Gb, using expansion slots, more 1/10Gb or 40Gb ports.  L2circuits, QinQ L2TP, vlan translation, rtg local-interface switching and so on...
>>> 
>>> We eat 1/10Gb ports, ASR920 didn’t help us with that.
>> 
>> Agreed - the ASR920 lacks port density. But, it does have the features, which come at a decent price.
>> 
>> Depending on how things pan out with Broadcom in the few short years to come, I think this will be a particularly good area for Arista to pick all their competitors off, should they come right with their IP/MPLS software implementations.
>> 
>> I feel the established/traditional equipment vendors are too busy producing half-baked Broadcom-based solutions just to have a "cheap" option to deal with customers considering Arista or white boxes; and focusing more on pushing their heavily-bloated "data centre" switches at massive $$ premiums. Slowly but surely, Arista (or anyone else copying their model) will rise to fill the gap.
>> 
>> Mark.
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