[afnog] QoS/TE

[nishal goburdhan]

Mark Tinka wrote:
> Hi all.

hi.

> Is QoS/TE in the core really necessary. I mean, like Joel 
> mentioned some time before AfNOG-2005, aside from your 
> edge (customer) and upstream links, what other links does 
> a network expect to really saturate if engineered well?

isn't this really specific to the services that you sell?
the simplest answer should  be:  if you can avoid it, then yes, avoid 
QoS.  if, for no other reason, to save cpu cycles on your software based 
routers.

in practice... :(

so, let's say you have a generic high latency, low cost path for 
all/most clients, but have a higher cost, lower latency path that you 
could resell to a select portion of your clients, for a premium [your 
network, you choose :) ]  if you could TE these premiums clients onto 
this path, you could save yourself a lot of otherwise painful PBR :)

judge for yourself;  here's some [potentially] useful vendor features 
that are QoS based:
http://www.juniper.net/techpubs/software/junos/junos61/swconfig61-interfaces/html/cos-config17.html
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120s/120s29/gscbts.htm 


--n.