Re: your mail

[Srikar B S <srikar@cse.iitk.ac.in>]

The error means that CBQ is being used on a link where a received packet
is not mapping to any defined flow.

One possible reason for the error is if you are using CBQ on a duplex
link. If you have configured the flows on one side and one of these flows
uses TCP to be transferred. The acks traverse the link in the opposite
direction and are not mapping to any particular flow on this duplex
link. You can overcome such a problem either by defining the flow for acks
or by breaking the definition of the duplex link to simplex links as 
follows

change
$ns duplex-link $n1 $n2 5Mb 2ms CBQ

to
$ns simplex-link $n1 $n2 5Mb 2ms CBQ
$ns simplex-link $n2 $n1 5Mb 2ms DropTail

Srikar
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On Mon, 17 May 1999, Satpute. Madhavi wrote:

> Does anyone know the meaning of this error?
> 
> ns: _o39 unknown-flow 0 512 1 1:
>     (_o39 cmd line 1)
>     invoked from within
> "_o39 cmd unknown-flow 0 512 1 1"
>     invoked from within
> "catch "$self cmd $args" ret"
>     (procedure "_o39" line 2)
>     (SplitObject unknown line 2)
>     invoked from within
> "_o39 unknown-flow 0 512 1 1"
> 
> Thanks,
> madhavi
> 
> 
> 
>