Cell Relay Archive

[Paul Koning <pkoning@lucent.com>]

tfrielin@my-deja.com wrote:
> 
> Hello,
> 
> to reduce the traffic generated by topology state packets the ATMF-PNNI
> offers the possibility to split the routing domain into peer groups. How
> large can peer groups get before their size causes problems? Of course
> this depends upon the switch performance and the utilization of the links
> but what are values typically used in real nets? Is it more like 5 of
> like 50?

I think the general feeling was the number would be somewhere
from 50 to a couple hundred.  That fits well with past practice
for hierarchical networks.  Experience would tell; perhaps the
numbers could be larger if the network is reasonably well constructed.

Certainly it shouldn't be much lower than 50; if a peer group of
50 doesn't work there's something wrong with the design that has
nothing to do with PNNI...

	paul

-- 
!-----------------------------------------------------------------------
! Paul Koning, NI1D, D-20853
! Lucent Corporation, 50 Nagog Park, Acton, MA 01720, USA
! phone: +1 978 263 0060 ext 115, fax: +1 978 263 8386
! email: pkoning@lucent.com
! Pgp:   27 81 A9 73 A6 0B B3 BE 18 A3 BF DD 1A 59 51 75
!-----------------------------------------------------------------------
! "A system of licensing and registration is the perfect device to deny
! gun ownership to the bourgeoisie."
!	-- Vladimir Ilyich Lenin