RE: Please Clarify Doubts regarding RGT & RNC

[Vishal Sharma <vishal@JasmineNetworks.com>]

Juergen,

Also, one more point on your statement below....

-Vishal


> > -----Original Message-----

<snip>
> > > -----Original Message-----
> > > From: Heiles Juergen [mailto:Juergen.Heiles@icn.siemens.de]
> > > Sent: 22 March 2001 09:07
> > > To: 'Vishal Sharma'; 'Hai Vodinh'; 'Zhi-Wei Lin'
> > > Cc: ccamp@ops.ietf.org; Greg Bernstein (E-mail)
> > > Subject: RE: Please Clarify Doubts regarding RGT & RNC
> > > 
> > > 
> > > Vishal,
> > > 
> > > in the circuit switched world he connection has a fixed 
> > > bandwidth. You cannot change the bandwidth. You have to tear 
> > > down the connection and set-up a new one with a different 
> > > bandwidth. For example if you want to change from VC-3 
> > > (STS-1-SPE) to VC-4 (STS-3c-SPE) the VC-3 connection is 
> > > released and a VC-4 connection is setup. The route could be 
> > > different as some equipment migth support VC-3 but not VC-4s 
> > > or vice versa.
> > > Virtual concatenation toegether with LCAS provides 
> > > flexibility in certain steps. However it applies only to the 
> > > end points as you mentioned. Between the end points you still 
> > > setup connections with fixed bandwidth.

This refers specifically to your last statement. It is true that between
the end points, each of the _component connections_ of a virtually
concatenated
signal is of fixed bandwidth, but one could always change the bandwidth of
the virtually concatenated signal itself (in discrete increments), by adding
or 
removing one or more of the component connections. So in that case, there
would be no need to tear down the entire signal and establish a different
one.