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

[Alexandre Guimaraes]

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.