[ns] CBR packet
Hi Can anyone know how to add data to cbr packet with 512bytes size.. I have defined packet as follows # 1 connecting to 2 at time 2.5568388786897245 # set udp_(0) [new Agent/UDP] $ns_ attach-agent $node_(1) $udp_(0) set null_(0) [new Agent/Null] $ns_ attach-agent $node_(2) $null_(0) set cbr_(0) [new Application/Traffic/CBR] $cbr_(0) set packetSize_ 512 $cbr_(0) set interval_ 0.25 $cbr_(0) set random_ 1 $cbr_(0) set maxpkts_ 1 $cbr_(0) attach-agent $udp_(0) $ns_ connect $udp_(0) $null_(0) $ns_ at 2.5568388786897245 "$cbr_(0) start" Now how to add data or message to this packet.. Urgent..
Re: [ns] cbr packet loss & or packet count scripts in perl>>>>
just add following in your tcl script to generate new trace format
# use new trace file format
$ns_ use-newtrace
-Original Message-
From: uknown noname [mailto:[EMAIL PROTECTED]
Sent: Thu 06/09/2007 1:15 PM
To: uknown noname; Mohammad Haseeb Zafar; Sayeed Ahmed; JEHD MAHDI; ns2 mailing
Subject: Re: [ns] cbr packet loss & or packet count scripts in perl>>>>
Hi.. probably i have using a wrong out.tr file where currently im using
/tcl/ex/wireless.tcl. i'm notice this will generated out.tr with old trace
format. is there any out.tr with new trace format for dsr that i can used with
this cript?
many thanks..
uknown noname <[EMAIL PROTECTED]> wrote:
hello...
i try to implement this script but i've got an error
(FILENAME=../out.tr FNR=24960) fatal: division by zero attempted
looks like this line
delay=sum/recvnum
give an error when 'recvnum' is 0, where recvnum++ are not functioning. any
idea?
Mohammad Haseeb Zafar wrote:
Plz see the following awk scripts that calcualate the following
Performance Metrics Used
Routing Overhead
Normalize Routing Load
Packet Delivery Fraction
Average End to End delay
Jitter
Drop Packets
Drop Bytes
Throughput
These scripts work with new trace format and DSR protocol. Make changes for
other protocols.
As an example, if you want to calculate throughput,
awk -f throughput.awk output.tr
# ==throughput.awk
BEGIN {
recvdSize = 0
startTime = 1e6
stopTime = 0
}
{
# Trace line format: normal
if ($2 != "-t") {
event = $1
time = $2
if (event == "+" || event == "-") node_id = $3
if (event == "r" || event == "d") node_id = $4
flow_id = $8
pkt_id = $12
pkt_size = $6
flow_t = $5
level = "AGT"
}
# Trace line format: new
if ($2 == "-t") {
event = $1
time = $3
node_id = $5
flow_id = $39
pkt_id = $41
pkt_size = $37
flow_t = $45
level = $19
}
# Store start time
if (level == "AGT" && (event == "+" || event == "s") && pkt_size >= 512) {
if (time < startTime) {
startTime = time
}
}
# Update total received packets' size and store packets arrival time
if (level == "AGT" && event == "r" && pkt_size >= 512) {
if (time > stopTime) {
stopTime = time
}
# Rip off the header
hdr_size = pkt_size % 512
pkt_size -= hdr_size
# Store received packet's size
recvdSize += pkt_size
}
}
END {
printf("Average Throughput[kbps] = %.2f\t\t
StartTime=%.2f\tStopTime=%.2f\n",(recvdSize/(stopTime-startTime))*(8/1000),startTime,stopTime)
}
# = parameters.awk
BEGIN {
sends=0;
recvs=0;
routing_packets=0.0;
droppedBytes=0;
droppedPackets=0;
highest_packet_id =0;
sum=0;
recvnum=0;
}
{
time = $3;
packet_id = $41;
#= CALCULATE PACKET DELIVERY FRACTION=
if (( $1 == "s") && ( $35 == "cbr" ) && ( $19=="AGT" )) { sends++; }
if (( $1 == "r") && ( $35 == "cbr" ) && ( $19=="AGT" )) { recvs++; }
#= CALCULATE DELAY
if ( start_time[packet_id] == 0 ) start_time[packet_id] = time;
if (( $1 == "r") && ( $35 == "cbr" ) && ( $19=="AGT" )) {
end_time[packet_id] = time; }
else { end_time[packet_id] = -1; }
#= TOTAL DSR OVERHEAD
if (($1 == "s" || $1 == "f") && $19 == "RTR" && $35 =="DSR") routing_packets++;
#= DROPPED DSR PACKETS
if (( $1 == "d" ) && ( $35 == "cbr" ) && ( $3 > 0 ))
{
droppedBytes=droppedBytes+$37;
droppedPackets=droppedPackets+1;
}
#find the number of packets in the simulation
if (packet_id > highest_packet_id)
highest_packet_id = packet_id;
}
END {
for ( i in end_time )
{
start = start_time[i];
end = end_time[i];
packet_duration = end - start;
if ( packet_duration > 0 ) { sum += packet_duration; recvnum++; }
}
delay=sum/recvnum;
NRL = routing_packets/recvs; #normalized routing load = routing load but
it differ from routing overhead
PDF = (recvs/sends)*100; #packet delivery ratio[fraction]
printf("send = %.2f\n",sends);
printf("recv = %.2f\n",recvs);
printf("routingpkts = %.2f\n",routing_packets++);
printf("PDF = %.2f\n",PDF);
printf("NRL = %.2f\n",NRL);
printf("Average e-e delay(ms)= %.2f\n",delay*1000);
printf("No. of dropped data (packets) = %d\n",droppedPackets);
printf(&q
Re: [ns] cbr packet loss & or packet count scripts in perl>>>>
event == "-") node_id = $3
if (event == "r" || event == "d") node_id = $4
flow_id = $8
pkt_id = $12
pkt_size = $6
flow_t = $5
level = "AGT"
}
# Trace line format: new
if ($2 == "-t") {
event = $1
time = $3
node_id = $5
flow_id = $39
pkt_id = $41
pkt_size = $37
flow_t = $45
level = $19
}
# Store packets send time
if (level == "AGT" && sendTime[pkt_id] == 0 && (event == "+" || event == "s")
&& pkt_size >= 512) {
sendTime[pkt_id] = time
}
# Store packets arrival time
if (level == "AGT" && event == "r" && pkt_size >= 512) {
recvTime[pkt_id] = time
num_recv++
}
}
END {
# Compute average jitter
jitter1 = jitter2 = tmp_recv = 0
prev_time = delay = prev_delay = processed = 0
prev_delay = -1
for (i=0; processed
if(recvTime[i] != 0) {
tmp_recv++
if(prev_time != 0) {
delay = recvTime[i] - prev_time
e2eDelay = recvTime[i] - sendTime[i]
if(delay < 0) delay = 0
if(prev_delay != -1) {
jitter1 += abs(e2eDelay - prev_e2eDelay)
jitter2 += abs(delay-prev_delay)
}
prev_delay = delay
prev_e2eDelay = e2eDelay
}
prev_time = recvTime[i]
}
processed++
}
}
END {
printf("Jitter1 = %.2f\n",jitter1*1000/tmp_recv);
printf("Jitter2 = %.2f\n",jitter2*1000/tmp_recv);
}
function abs(value) {
if (value < 0) value = 0-value
return value
}
# === end
-Original Message-
From: [EMAIL PROTECTED] on behalf of Sayeed Ahmed
Sent: Tue 04/09/2007 4:56 PM
To: JEHD MAHDI; ns2 mailing
Subject: Re: [ns] cbr packet loss & or packet count scripts in perl>>>>
Hi,
>Hi there I've got a script to analyse packets awk file>>>
Can you please tell from where you get the awk script example I will help
me a lot.
Thanking you,
Sayeed.
JEHD MAHDI wrote:
J Mahdi
Newcastle Upon Tyne
**
My favourite sites:
www.al-islam.com
www.islamspirit.com
www.troid.org
From: [EMAIL PROTECTED]: [EMAIL PROTECTED]: cbr packet loss & or packet count
scripts in perl>>>>Date: Sun, 2 Sep 2007 17:36:47 +
Hi there I've got a script to analyse packets awk file, but it doesn't work,
but i know that perl scripts would work, any one could help with a similar one
in perl...cheers
J Mahdi
Newcastle Upon Tyne
**
Are you the Quizmaster? Play BrainBattle with a friend now!
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My system :
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Re: [ns] cbr packet loss & or packet count scripts in perl>>>>
e_id = $5
flow_id = $39
pkt_id = $41
pkt_size = $37
flow_t = $45
level = $19
}
# Store packets send time
if (level == "AGT" && sendTime[pkt_id] == 0 && (event == "+" || event == "s")
&& pkt_size >= 512) {
sendTime[pkt_id] = time
}
# Store packets arrival time
if (level == "AGT" && event == "r" && pkt_size >= 512) {
recvTime[pkt_id] = time
num_recv++
}
}
END {
# Compute average jitter
jitter1 = jitter2 = tmp_recv = 0
prev_time = delay = prev_delay = processed = 0
prev_delay = -1
for (i=0; processed
if(recvTime[i] != 0) {
tmp_recv++
if(prev_time != 0) {
delay = recvTime[i] - prev_time
e2eDelay = recvTime[i] - sendTime[i]
if(delay < 0) delay = 0
if(prev_delay != -1) {
jitter1 += abs(e2eDelay - prev_e2eDelay)
jitter2 += abs(delay-prev_delay)
}
prev_delay = delay
prev_e2eDelay = e2eDelay
}
prev_time = recvTime[i]
}
processed++
}
}
END {
printf("Jitter1 = %.2f\n",jitter1*1000/tmp_recv);
printf("Jitter2 = %.2f\n",jitter2*1000/tmp_recv);
}
function abs(value) {
if (value < 0) value = 0-value
return value
}
# === end
-Original Message-
From: [EMAIL PROTECTED] on behalf of Sayeed Ahmed
Sent: Tue 04/09/2007 4:56 PM
To: JEHD MAHDI; ns2 mailing
Subject: Re: [ns] cbr packet loss & or packet count scripts in perl>>>>
Hi,
>Hi there I've got a script to analyse packets awk file>>>
Can you please tell from where you get the awk script example I will help
me a lot.
Thanking you,
Sayeed.
JEHD MAHDI wrote:
J Mahdi
Newcastle Upon Tyne
**
My favourite sites:
www.al-islam.com
www.islamspirit.com
www.troid.org
From: [EMAIL PROTECTED]: [EMAIL PROTECTED]: cbr packet loss & or packet count
scripts in perl>>>>Date: Sun, 2 Sep 2007 17:36:47 +
Hi there I've got a script to analyse packets awk file, but it doesn't work,
but i know that perl scripts would work, any one could help with a similar one
in perl...cheers
J Mahdi
Newcastle Upon Tyne
**
Are you the Quizmaster? Play BrainBattle with a friend now!
_
Discover the new Windows Vista
http://search.msn.com/results.aspx?q=windows+vista&mkt=en-US&form=QBRE
-
Shape Yahoo! in your own image. Join our Network Research Panel today!
My system :
FC 6
2.6.18-1.2869.fc6
ns2.30
-
Need a vacation? Get great deals to amazing places on Yahoo! Travel.
Re: [ns] cbr packet loss & or packet count scripts in perl>>>>
ops, the link was splitted, here it goes again: http://fly.ath.cx/mobidyn/software On Sep 5, 2007, at 1:12 AM, Julian Monteiro wrote: > > Hello Sayeed, > > I've another awk NS2 trace file analyzer here: http://fly.ath.cx/ > mobidyn > (download the genstats11.awk) > > Best regards, > Julian > > On Sep 4, 2007, at 12:56 PM, Sayeed Ahmed wrote: > >> >> Hi, >> >>> Hi there I've got a script to analyse packets awk file>>> >> >> Can you please tell from where you get the awk script example >> I will help me a lot. >> >> Thanking you, >> >> Sayeed. >> >> >> JEHD MAHDI <[EMAIL PROTECTED]> wrote: >> >> >> >> >> >> J Mahdi >> Newcastle Upon Tyne >> ** >> My favourite sites: >> www.al-islam.com >> www.islamspirit.com >> www.troid.org >> >> >> >> From: [EMAIL PROTECTED]: [EMAIL PROTECTED]: cbr packet >> loss & or packet count scripts in perlDate: Sun, 2 Sep 2007 >> 17:36:47 + >> >> >> Hi there I've got a script to analyse packets awk file, but it >> doesn't work, but i know that perl scripts would work, any one >> could help with a similar one in perl...cheers >> >> >> J Mahdi >> Newcastle Upon Tyne >> ** >> >> >> Are you the Quizmaster? Play BrainBattle with a friend now! >> _ >> Discover the new Windows Vista >> http://search.msn.com/results.aspx?q=windows+vista&mkt=en- >> US&form=QBRE >> >> >> >> - >> Shape Yahoo! in your own image. Join our Network Research Panel >> today! >
Re: [ns] cbr packet loss & or packet count scripts in perl>>>>
Hello Sayeed, I've another awk NS2 trace file analyzer here: http://fly.ath.cx/ mobidyn (download the genstats11.awk) Best regards, Julian On Sep 4, 2007, at 12:56 PM, Sayeed Ahmed wrote: > > Hi, > >> Hi there I've got a script to analyse packets awk file>>> > > Can you please tell from where you get the awk script example > I will help me a lot. > > Thanking you, > > Sayeed. > > > JEHD MAHDI <[EMAIL PROTECTED]> wrote: > > > > > > J Mahdi > Newcastle Upon Tyne > ** > My favourite sites: > www.al-islam.com > www.islamspirit.com > www.troid.org > > > > From: [EMAIL PROTECTED]: [EMAIL PROTECTED]: cbr packet > loss & or packet count scripts in perlDate: Sun, 2 Sep 2007 > 17:36:47 + > > > Hi there I've got a script to analyse packets awk file, but it > doesn't work, but i know that perl scripts would work, any one > could help with a similar one in perl...cheers > > > J Mahdi > Newcastle Upon Tyne > ** > > > Are you the Quizmaster? Play BrainBattle with a friend now! > _ > Discover the new Windows Vista > http://search.msn.com/results.aspx?q=windows+vista&mkt=en-US&form=QBRE > > > > - > Shape Yahoo! in your own image. Join our Network Research Panel > today!
Re: [ns] cbr packet loss & or packet count scripts in perl>>>>
Plz see the following awk scripts that calcualate the following
Performance Metrics Used
Routing Overhead
Normalize Routing Load
Packet Delivery Fraction
Average End to End delay
Jitter
Drop Packets
Drop Bytes
Throughput
These scripts work with new trace format and DSR protocol. Make changes for
other protocols.
As an example, if you want to calculate throughput,
awk -f throughput.awk output.tr
# ==throughput.awk
BEGIN {
recvdSize = 0
startTime = 1e6
stopTime = 0
}
{
# Trace line format: normal
if ($2 != "-t") {
event = $1
time = $2
if (event == "+" || event == "-") node_id = $3
if (event == "r" || event == "d") node_id = $4
flow_id = $8
pkt_id = $12
pkt_size = $6
flow_t = $5
level = "AGT"
}
# Trace line format: new
if ($2 == "-t") {
event = $1
time = $3
node_id = $5
flow_id = $39
pkt_id = $41
pkt_size = $37
flow_t = $45
level = $19
}
# Store start time
if (level == "AGT" && (event == "+" || event == "s") && pkt_size >= 512) {
if (time < startTime) {
startTime = time
}
}
# Update total received packets' size and store packets arrival time
if (level == "AGT" && event == "r" && pkt_size >= 512) {
if (time > stopTime) {
stopTime = time
}
# Rip off the header
hdr_size = pkt_size % 512
pkt_size -= hdr_size
# Store received packet's size
recvdSize += pkt_size
}
}
END {
printf("Average Throughput[kbps] = %.2f\t\t
StartTime=%.2f\tStopTime=%.2f\n",(recvdSize/(stopTime-startTime))*(8/1000),startTime,stopTime)
}
# = parameters.awk
BEGIN {
sends=0;
recvs=0;
routing_packets=0.0;
droppedBytes=0;
droppedPackets=0;
highest_packet_id =0;
sum=0;
recvnum=0;
}
{
time = $3;
packet_id = $41;
#= CALCULATE PACKET DELIVERY FRACTION=
if (( $1 == "s") && ( $35 == "cbr" ) && ( $19=="AGT" )) { sends++; }
if (( $1 == "r") && ( $35 == "cbr" ) && ( $19=="AGT" )) { recvs++; }
#= CALCULATE DELAY
if ( start_time[packet_id] == 0 ) start_time[packet_id] = time;
if (( $1 == "r") && ( $35 == "cbr" ) && ( $19=="AGT" )) {
end_time[packet_id] = time; }
else { end_time[packet_id] = -1; }
#= TOTAL DSR OVERHEAD
if (($1 == "s" || $1 == "f") && $19 == "RTR" && $35 =="DSR") routing_packets++;
#= DROPPED DSR PACKETS
if (( $1 == "d" ) && ( $35 == "cbr" ) && ( $3 > 0 ))
{
droppedBytes=droppedBytes+$37;
droppedPackets=droppedPackets+1;
}
#find the number of packets in the simulation
if (packet_id > highest_packet_id)
highest_packet_id = packet_id;
}
END {
for ( i in end_time )
{
start = start_time[i];
end = end_time[i];
packet_duration = end - start;
if ( packet_duration > 0 ) { sum += packet_duration; recvnum++; }
}
delay=sum/recvnum;
NRL = routing_packets/recvs; #normalized routing load = routing load but
it differ from routing overhead
PDF = (recvs/sends)*100; #packet delivery ratio[fraction]
printf("send = %.2f\n",sends);
printf("recv = %.2f\n",recvs);
printf("routingpkts = %.2f\n",routing_packets++);
printf("PDF = %.2f\n",PDF);
printf("NRL = %.2f\n",NRL);
printf("Average e-e delay(ms)= %.2f\n",delay*1000);
printf("No. of dropped data (packets) = %d\n",droppedPackets);
printf("No. of dropped data (bytes) = %d\n",droppedBytes);
printf("Packet Loss [%]= %.2f \n",
(droppedPackets/(highest_packet_id+1))*100);
}
# == jitter.awk
BEGIN {
num_recv=0
}
{
# Trace line format: normal
if ($2 != "-t") {
event = $1
time = $2
if (event == "+" || event == "-") node_id = $3
if (event == "r" || event == "d") node_id = $4
flow_id = $8
pkt_id = $12
pkt_size = $6
flow_t = $5
level = "AGT"
}
# Trace line format: new
if ($2 == "-t") {
event = $1
time = $3
node_id = $5
flow_id = $39
pkt_id = $41
pkt_size = $37
flow_t = $45
level = $19
}
# Store packets send time
if (level == "AGT" && sendTime[pkt_id] == 0 && (event == "+" || event == "s")
&& pkt_size >= 512) {
sendTime[pkt_id] = time
}
# Store packets arrival time
if (level == "AGT" && event == "r" && pkt_size >= 512) {
recvTime[pkt_id] = time
num_recv++
}
}
END {
# Compute average jitter
jitter1 = jitter2 = tmp_recv = 0
prev_time = delay = prev_delay = processed = 0
prev_delay = -1
for (i=0; processed>>>
Hi,
>Hi there I've got a script to analyse packets awk file>>>
Can you please tell from where you get the awk script example I will help
me a lot.
Thanking you,
Sayeed.
JEHD MAHDI <[EMAIL PROTECTED]> wrote:
J Mahdi
Newcastle Upon Tyne
**
My favourite sites:
www.al-islam.com
www.islamspirit.com
www.troid.org
Re: [ns] cbr packet loss & or packet count scripts in perl>>>>
Hi, >Hi there I've got a script to analyse packets awk file>>> Can you please tell from where you get the awk script example I will help me a lot. Thanking you, Sayeed. JEHD MAHDI <[EMAIL PROTECTED]> wrote: J Mahdi Newcastle Upon Tyne ** My favourite sites: www.al-islam.com www.islamspirit.com www.troid.org From: [EMAIL PROTECTED]: [EMAIL PROTECTED]: cbr packet loss & or packet count scripts in perlDate: Sun, 2 Sep 2007 17:36:47 + Hi there I've got a script to analyse packets awk file, but it doesn't work, but i know that perl scripts would work, any one could help with a similar one in perl...cheers J Mahdi Newcastle Upon Tyne ** Are you the Quizmaster? Play BrainBattle with a friend now! _ Discover the new Windows Vista http://search.msn.com/results.aspx?q=windows+vista&mkt=en-US&form=QBRE - Shape Yahoo! in your own image. Join our Network Research Panel today!
Re: [ns] cbr packet loss & or packet count scripts in perl>>>>
J Mahdi Newcastle Upon Tyne ** My favourite sites: www.al-islam.com www.islamspirit.com www.troid.org From: [EMAIL PROTECTED]: [EMAIL PROTECTED]: cbr packet loss & or packet count scripts in perlDate: Sun, 2 Sep 2007 17:36:47 + Hi there I've got a script to analyse packets awk file, but it doesn't work, but i know that perl scripts would work, any one could help with a similar one in perl...cheers J Mahdi Newcastle Upon Tyne ** Are you the Quizmaster? Play BrainBattle with a friend now! _ Discover the new Windows Vista http://search.msn.com/results.aspx?q=windows+vista&mkt=en-US&form=QBRE
[ns] cbr packet loss & or packet count scripts in perl>>>>
Hi there I've got a script to analyse packets awk file, but it doesn't work, but i know that perl scripts would work, any one could help with a similar one in perl...cheers J Mahdi Newcastle Upon Tyne ** _ Get free emoticon packs and customisation from Windows Live. http://www.pimpmylive.co.uk
Re: [ns] CBR packet size on 802.11b link
Hi Pedro, what do you mean by L2 & L4 packet size? I enabled RTR & AGT. As far as I understand, the AGT trace shows the packet as it's generated by the agent(in this case UDP. I that correct? What does the RTR trace show? it's got the exact same packet size and timestamp as my AGT trace? It's not any clearer why the received packet at node1 is smaller than the sent packet at node0? Richard >From: "Pedro Vale Estrela" <[EMAIL PROTECTED]> >Reply-To: [EMAIL PROTECTED] >To: "'Lars Lars'" <[EMAIL PROTECTED]>, >Subject: Re: [ns] CBR packet size on 802.11b link >Date: Mon, 18 Dec 2006 22:58:51 - > > > > >Good question. You'll get confusing and sometimes conflicting packets sizes >when setting it at the agent, transport or application level, but this is >at >the same layer. > >Maybe the send is L2 packet size, with l2 headers, and recv is L4 pakcet >size without headers >Try enabling the RTR and AGT traces > >Pedro Vale Estrela > > > > -Original Message- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On >Behalf > > Of Lars Lars > > Sent: segunda-feira, 18 de Dezembro de 2006 21:46 > > To: ns-users@ISI.EDU > > Subject: [ns] CBR packet size on 802.11b link > > > > > > Hi, > > I'm sending 1004 Byte CBR packets using a UDP agent with a packet size >of > > 1024. After the RTS/CTS handshaking is complete I can see the packet > > sending > > and receiving. Tracefile extract is below. Why is the cbr packet size >1076 > > when sending and 1024 when arriving?? > > > > L > > > > > > s 1.213410777 _0_ MAC --- 0 RTS 44 > > r 1.213763444 _1_ MAC --- 0 RTS 44 > > s 1.213773444 _1_ MAC --- 0 CTS 38 > > r 1.21407811 _0_ MAC --- 0 CTS 38 > > s 1.21408811 _0_ MAC --- 267 cbr 1076 > > r 1.215045868 _1_ MAC --- 267 cbr 1024 > > > > _ > > Discover the magic of RSS feeds at MSN Ireland! http://ie.msn.com/ > > _ Find a baby-sitter FAST with MSN Search! http://search.msn.ie/
Re: [ns] CBR packet size on 802.11b link
Good question. You'll get confusing and sometimes conflicting packets sizes when setting it at the agent, transport or application level, but this is at the same layer. Maybe the send is L2 packet size, with l2 headers, and recv is L4 pakcet size without headers Try enabling the RTR and AGT traces Pedro Vale Estrela > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf > Of Lars Lars > Sent: segunda-feira, 18 de Dezembro de 2006 21:46 > To: ns-users@ISI.EDU > Subject: [ns] CBR packet size on 802.11b link > > > Hi, > I'm sending 1004 Byte CBR packets using a UDP agent with a packet size of > 1024. After the RTS/CTS handshaking is complete I can see the packet > sending > and receiving. Tracefile extract is below. Why is the cbr packet size 1076 > when sending and 1024 when arriving?? > > L > > > s 1.213410777 _0_ MAC --- 0 RTS 44 > r 1.213763444 _1_ MAC --- 0 RTS 44 > s 1.213773444 _1_ MAC --- 0 CTS 38 > r 1.21407811 _0_ MAC --- 0 CTS 38 > s 1.21408811 _0_ MAC --- 267 cbr 1076 > r 1.215045868 _1_ MAC --- 267 cbr 1024 > > _ > Discover the magic of RSS feeds at MSN Ireland! http://ie.msn.com/
[ns] CBR packet size on 802.11b link
Hi, I'm sending 1004 Byte CBR packets using a UDP agent with a packet size of 1024. After the RTS/CTS handshaking is complete I can see the packet sending and receiving. Tracefile extract is below. Why is the cbr packet size 1076 when sending and 1024 when arriving?? L s 1.213410777 _0_ MAC --- 0 RTS 44 r 1.213763444 _1_ MAC --- 0 RTS 44 s 1.213773444 _1_ MAC --- 0 CTS 38 r 1.21407811 _0_ MAC --- 0 CTS 38 s 1.21408811 _0_ MAC --- 267 cbr 1076 r 1.215045868 _1_ MAC --- 267 cbr 1024 _ Discover the magic of RSS feeds at MSN Ireland! http://ie.msn.com/
