[c-nsp] IOS XR

[Mark Tinka]

On Thursday, September 08, 2011 01:27:09 AM Mikael 
Abrahamsson wrote:

> Most IPTV applications will give visual impairment at
> single packet losses. At 50ms packet loss you're losing
> a lot more than single packet.
> 
> I pulled 50ms from the classic SDH/SONET convergence
> time, I'd say it's pretty much industry standard when
> aiming for quick convergence.

Except that actually attaining it in the real IP/MPLS world, 
especially when you are a multi-vendor network, can be quite 
interesting, depending on how each vendor implements MPLS-
TE, and where the break/repair needs to occur, and in some 
cases, how that particular platform actually implements the 
technology.

But generally speaking, it does turn out to be reasonably 
better than simply relying on intrinsic IGP convergence. We 
run a sizeable IPTv transport network and are quite happy, 
including a test CRS box in the core/path of recovery where 
Receiver PE routers are Juniper MX480's.

Cheers,

Mark.
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