Re: Solution to my multicast woes

[John Heidemann <johnh@ISI.EDU>]

On Mon, 14 Sep 1998 10:55:23 BST, Lloyd Wood wrote: 
>On Mon, 14 Sep 1998, Christoph Haenle wrote:
>
>> Hello Lloyd,
>> 
>> just a quick question since you seem to have dived into this matter: What 
>> happens if the number of nodes exceeds 128 and "Note expandaddr" is
>> activated?  Any ideas? 
>
>[cc'd to the list as of general interest...]
>
>AFAIK it depends on the version of ns you're running.
>
>I seem to recall that ns 2.1b2 and earlier had no checking at all on
>the number of nodes allocated relative to the available node field
>size; see the thread starting at:
>
>http://www-mash.cs.berkeley.edu/dist/archive/ns-users/9807/0190.html
>
>where I finally noticed the address space problem for the first time.
>With ns 2.1b3 and later, a check cuts in and I get errors of the form:
>
>Number of nodes exceeds node-field-size of 7 bits
>    while executing
>"error "Number of nodes exceeds node-field-size of $nodebits_ bits""
>    (procedure "_o4" line 4)
>    (Simulator check-node-num line 4)
>    invoked from within
>"$self check-node-num"
>    (procedure "_o4" line 8)
>    (Simulator node line 8)
>    invoked from within
>"$ns node"
>    (file "torus25.tcl" line 379)
>
>I'm not sure exactly when in the snapshot history that change was
>implemented. Anyone?

This error message was added 27-May-98 and should be in ns-2.1b3.

   -John Heidemann