Re: Trace files format

[Kasza Tamas <kasza@sch.bme.hu>]

On Thu, 9 Apr 1998, Sherif Rizkalla wrote:

> Hi everybody,
> I'm a new ns user, and I was a bit confused by the trace file formats..
> All the documentations I have found said that '+' is enqueue, '-' is
> dequeue, and 'd' is for drops.
> But every simulation I ran so far, as well as the examples (ns2.1b2) had
> '+', '-' and 'r' (no 'd').. So I assume the 'r's are drops, but the rate
> was so high that you could say almost 90% of the packets are dropped.
> Any ideas?
> Thanx
> 
> -Sherif
> 
Hi (Sherif),

	'd' means that the que is full at that link, and the incoming
packet is lost,
for example:

+ 0 0 1 tcp 1000 ------- 0 0.19 2.9 0 11
d 0 0 1 tcp 1000 ------- 0 0.19 2.9 0 11

Here the incoming packet between the node 0 and node 1 is dropped.

	'r' means that an agent (at a node) receive a packet,
for example:

r 0.0008 0 1 tcp 1000 ------- 0 0.15 2.5 0 1
+ 0.0008 1 2 tcp 1000 ------- 0 0.15 2.5 0 1

Here the received packet at node 1 is forwarded to the queue between node
1 and node2.

	-K.