[ns] Can RED set ECN bit on ACK packets?

[Jeu George]

Yes, u can surely set the ecn bit. But, the ECN code in NS does not
conform with RFC 3168 (Sep 2001) as the current NS version ns-2.1b8a came
before that (I think sometime in June 2001). I have done modifications
that makes NS conformant with RFC 3168.

Regards
Jeu

On Wed, 10 Apr 2002, Laurence Dj wrote:

> 
> Dear,
> 
> As far as I know, RED gateway can set the ECN bit on DATA packet (e.g tcpecn.tcl implement this). But if I have a topology which is
> asymetric network, where the downstream is 10 Mb and delay 2ms with RED and the upstream is 28.8 Kb delay 10ms with RED, can RED
> gateway on downstream router mark the ECN (or ECN echo) bit on ACK packets which make the gateway buffer congested? or RED gateway
> only can mark DATA packet?
> 
> s1
>     \
>       \  10 Mb, 2ms
> 
>          \          10 Mb, 2ms                   10 Mb, 2ms
>            R1 = = = = = = = = = =  R2 - - - - - - - - - r1
> 
>                      28.8 Kb, 10ms       ^downstream router
> 
>  
> 
> Thanks in advance,
> 
>  
> 
> Laurence
> 
> University of New South Wales, Sydney
> 
> 
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