Re: MPLS acceptable latency?

[Alex <dreamwaverfx () yahoo com>]

Perhaps the network is "oldish" and there are BW bottlenecks that lead 
to queues on the switches/routers that results in higher latency.
This would depend alot on the internal QoS strategy used by AT&T, the 
type of equipment used and the load in different parts of the network.

The only way to know what happens inside their MPLS cloud is to get past 
support and ask someone from the technical staff.

On 11/16/2012 12:06 AM, Randy wrote:
> --- On Thu, 11/15/12, William Herrin <bill () herrin us> wrote:
>
> > From: William Herrin <bill () herrin us>
> > Subject: Re: MPLS acceptable latency?
> > To: "Mikeal Clark" <mikeal.clark () gmail com>
> > Cc: "NANOG [nanog () nanog org]" <nanog () nanog org>
> > Date: Thursday, November 15, 2012, 1:23 PM
> > On Thu, Nov 15, 2012 at 1:54 PM,
> > Mikeal Clark <mikeal.clark () gmail com>
> > wrote:
> > > I have some AT&T MPLS sites under a managed
> > contract with latency
> > > averaging 75-85 ms without any load.  These sites
> > are only 45 minutes
> > > away.
> > I've noticed this with AT&T's MPLS product when dealing
> > with the
> > internal corporate network here. I don't know what they're
> > doing wrong
> > but it is so very wrong.
> circa 2007, noticed same thing: never below 90ms coast-to-coast across as13979. atm ds3 handoffs on both ends.
>
> > >    What is considered normal/acceptable?
> > Less than 10ms unless you're using a sub-T1 interface or
> > going a very
> > long distance.
> >
> > Regards,
> > Bill Herrin
> >
> >
> > --
> > William D. Herrin ................ herrin () dirtside com
> > bill () herrin us
> > 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
> > Falls Church, VA 22042-3004