[ns] plz reply Link state problem
hello im running link state routing protocol successfully that is rtproto ls here it uses only hop count to find the shortest path from src to dtn route.cc we can see that i want to find the shortest path from src to detn using bandwidth and delay(propagation and queuing delay) how to add delay and bandwidth to route.cc to find the shortest path. pls help me and guide me thanking all
[ns] plz reply Link state problem
hello im running link state routing protocol successfully that is rtproto ls here it uses only hop count to find the shortest path from src to dtn route.cc we can see that i want to find the shortest path from src to detn using bandwidth and delay(propagation and queuing delay) how to add delay and bandwidth to route.cc to find the shortest path. pls help me and guide me thanking all
[ns] Link state problem
hello im running link state routing protocol successfully that is rtproto ls here it uses only hop count to find the shortest path from src to dtn route.cc we can see that i want to find the shortest path from src to detn using bandwidth and delay(propagation and queuing delay) how to add delay and bandwidth to route.cc to find the shortest path. pls help me and guide me thanking all
[ns] Link state problem
hello im running link state routing protocol successfully that is rtproto ls here it uses only hop count to find the shortest path from src to dtn route.cc we can see that i want to find the shortest path from src to detn using bandwidth and delay(propagation and queuing delay) how to add delay and bandwidth to route.cc to find the shortest path. pls help me and guide me thanking all
[ns] Link state problem
hello im running link state routing protocol successfully that is rtproto ls here it uses only hop count to find the shortest path from src to dtn route.cc we can see that i want to find the shortest path from src to detn using bandwidth and delay(propagation and queuing delay) how to add delay and bandwidth to route.cc to find the shortest path. pls help me and guide me thanking all
[ns] Link state problem
hi can anybody tell me how to enable load balancing and bandwidth count features of link state plz plz help me
[ns] Link state routing Algo problem
hi well its quite easy to use link state routing protocol in ns2 simply use $ns rtproto LS but what if we have to do load balancing and also want routing agent to consider link bandwidth before taking routing decisions. Aare there any options ??? Thnxs in Advance
[ns] multipath problem
well i was trying to insert multiple routes to node
but following error are comming
below is the code
plz reply
*Code:*
Agent/rtProto/SLRA instproc madd-route {peerAddr dst check nodeid} {
$self instvar nextHop_
global multi test target_list
puts "check $check"
set node_ [$self id2handle $nodeid]
set dest_ [$self id2handle $dst]
if { $multi !=1} {
puts "for subnet $dst the link is $peerAddr"
set ns_ [Simulator instance]
set nullAgent_ [$ns_ set nullAgent_]
set a [$dest_ set address_]
set b [$ns_ link $node_ $peerAddr]
if { $test == 1 } {
lset target_list 0 $b
set test 2
} else {
lappend target_list $b
puts " target list $target_list"
}
if { $check == 1 } {
if { $nextHop_($dest_) != "" } {
$node_ delete-route [$dst id] $nextHop_($dst) $nullAgent_
}
$node_ add-routes $dst $target_list
$node_ set multipath_ 1
}
}
}
*Quote:*
it gives following error
ns: _o371 madd-route 3 5 1 2: can't read "class::": no such variable
while executing
"warn "$class::$proc cannot install multiple routes""
invoked from within
"if !$multiPath_ {
if {[llength $ifs] > 1} {
warn "$class::$proc cannot install multiple routes"
set ifs [lindex $ifs 0]
}
$self add-route $id [$ifs he..."
(procedure "_o16" line 3)
(Node add-routes line 3)
invoked from within
"$node_ add-routes $dst $target_list"
(procedure "_o371" line 44)
(Agent/rtProto/SLRA madd-route line 44)
invoked from within
"_o371 madd-route 3 5 1 2" [/code]
[ns] Multipath routing problem
hi
i m writing a routing Algo. for the wired network
i have write most of the code and now working with load balancing issue
i have formulated it and have also write the code
but problem is after sensing a congestion in a network or getting link
utilization high
it calls my method madd-routes which add multiple routes for load balancing
but the problem is that
it only shift the traffic for once
i have found that ns2 send traffic in round robin when multipath_ is set to
1
as define in ns notes
what would be the problem???
here is the code snippet
Agent/rtProto/SLRA instproc madd-route {peerAddr dst check nodeid} {
$self instvar nextHop_
global multi
puts "check $check"
set node_ [$self id2handle $nodeid]
set dest_ [$self id2handle $dst]
puts "for subnet $dst the link is $peerAddr"
set ns_ [Simulator instance]
set nullAgent_ [$ns_ set nullAgent_]
set a [$dest_ set address_]
set b [$ns_ link $node_ $peerAddr]
lappend target_list $b
if { $check == 1 } {
if { $nextHop_($dest_) != "" } {
$node_ delete-route [$dst id] $nextHop_($dst) $nullAgent_
}
$node_ add-routes $dst $target_list
$node_ set multipath_ 1
set $multi 1
}
# check is use to to check whehter all routes are added in terget list and
is #controlled in c++
[ns] Multipath routing info
hi i m doing some load balancing stuff i have multiple routes to destination in my routing table can you tell me how i can use these routes for load balancing i have searched and find out that we have to set multipath to 1 then it uses it all the routes in round robin fashion any info or pointers are welcome thnxs
[ns] getting link queue class prob
hi to all
well these are problems i m facing now
i was trying to get nos of bytes currently contain in a Que
after searching i have found that queue class contain a packetqueue object
that have a protected variable "bytes_"
i have done this to get a queue handle
set queulimt [[[$ns link $node $nbr ] set queue_] set limit_]
it gives me max nos of packet queue can contain
i found no way to communicate the queue class in c++
and finds out that queue doesnt have any command funtion
then i turn back to droptail queue classs and find out that it contain a
command function and also contain base class queue::command();
but i havent found any implementation of queue::command()
further more when i try to write my own command funtion in existing queue
base class it gives an errror of unknown split object
then i done this ,
set queu [[[$ns link $node $nbr ] set queue_]
then i took the refrence back to my c++ code
there i done this
Queue *q;
q=argv[9] /// as it comes at postion 9
q->byteLength();
it gives a segmentation fault error
then i tries to create a bind object like
this
bind("byte_", tmpq);
and in tcl i set it with queu handle
$self set byte_ $queue
and in c++
tmpq=(Queue*)bytes_;
Tcl::instance().evalf("puts \"bytes %d\"",tmpq->byteLength());
output was 0 at that time
do you have any other idea about this
[ns] queue split object prob
hi to all plz do reply, i m in die hard need i was trying to get nos of bytes currently contain in a que after searching i have found that queue class contain a packetqueue object that hav a protected variable "bytes_" i have done this to get a queue handle set queu [[[$ns link $node $nbr ] set queue_] set limit_] it gives me max nos of packet queue can contain but i want to communicate queue c++ class ,but finds out that queue doesnt have any command funtion then i turn back to droptail queue classs and find out that it contain a command function and also contain queue::command(); but i havent found any implementation of queue::command() further more when i try to write my own command funtion in existing queue base class it gives an errror of unknown split object can any any one tell me whats really hapning and it there any thing i can do to get bytes_ value in my program thnks alot and plz do reply
[ns] getting queue limit prob
hi to all m trying to get a queue limit using this code set queue [[$ns_ link $node $nbr] set queue_] set queueli [$queue queue_in_bytes_] puts "queuuelimit $queueli" i have used simple drop tail queue after getting handle of queue from link i tried to use queue_in_bytes as its bind with tcl i have checked in droptail class in c++ but its was not working , it says set savedInfo $errorInfo error "error when calling class $cls: $args" $..." (procedure "_o46" line 2) (SplitObject unknown line 2) invoked from within "$queue queue_in_bytes_" help me out plzz
[ns] LInk bandwidth issue plz reply
hi to all
plz do reply m in despratre need of it
i have implented a routing algo and i want to get information about how much
the link is utilized
and further more
can anyone tell me how
an you tell me how to get bandwith of a link
i tried the following scheme but its not working
set ns_ [Simulator instance]
set link_ [$ns_ link $node $nbr]
set bw [$link_ bw?]
puts "bandwidh $bw"
and in ns-link i wrote a proc
Link instproc bw? {} {
$self instvar bandwidth_
$link_ set b $bandwidth_
return $b
}
but its not working
[ns] how to get link utilization info
hi to all
i have implented a routing algo and i want to get information about how much
the link is utilized
and further more
can anyone tell me how
an you tell me how to get bandwith of a link
i tried the following scheme but its not working
set ns_ [Simulator instance]
set link_ [$ns_ link $node $nbr]
set bw [$link_ bw?]
puts "bandwidh $bw"
and in ns-link i wrote a proc
Link instproc bw? {} {
$self instvar bandwidth_
$link_ set b $bandwidth_
return $b
}
but its not working
[ns] getting link bandwith prob
hey hi to all
can you tell me how to get bandwith of a link
i tried the following scheme but its not working
set ns_ [Simulator instance]
set link_ [$ns_ link $node $nbr]
set bw [$link_ bw?]
puts "bandwidh $bw"
and in ns-link i wrote a proc
Link instproc bw? {} {
$self instvar bandwidth_
$link_ set b $bandwidth_
return $b
}
but its not working
thnks in advance
[ns] creating to new adder classifier problem
i have created a routing algorithm by further inherating it from agent/rtproto/MyAlgo i want my Algo to receive all packet that is received by the node should also recieved by my agent too wat would be the solution??? and i have learned tht it would be easy to create a addr classifier if so can you tell me how to create give me some link about it thanks
[ns] tcp and udp on same node problem
hey hi 2 all well i have created my routing protocol and it works gud but when i use udp simulate -- it works fine when i use tcp simulate it also works fine--- but when i use both as a source at same node at a time tcp doesn't simulate or no simulation is performed only routing packets are animated why?? can you suggest ??
[ns] how to Create Adr classifier
Hello and to all i have created a routing algorithm by further inherating it from agent/rtproto/MyAlgo i want my Algo to receive all packet that is received by the node wat would be the solution??? and i have learned tht it would be easy to create a addr classifier if so can you tell me how to create give me some link about it thanks
[ns] Add-route is not working
i have implemented a routing algorithm for wired network
after calculating routes
i called a function from c++ to tcl that does following
{
$node_ add-route $subnet $peerAddr
puts "$node_ add-route $subnet $peerAddr"
}
every thing is going fine and simulation ends without any error
but no data traffic is generated
and when i dump the routes i found no routes added in nodes routing table
can any one tell me whats really the problem is
thnxs
[ns] size of packet and Application traffic
hi i have tried to create a routing algo for the wired network i follow the dv and use dv tcl script where neccessay and port almost everything in c++, every thing is going fine but there are some problem too i don't how to set size_ of my packet consequently, in trace file it put 0 in packet size and my application layer traffic is not started when simulation begin it computes routing info and simulated routing traffic ,and then stop .i dont why it is not sending data traffic i also install route in appropriate node but no data traffic still
[ns] Directed broadcast
hi can any one tell me how to send a directed broadcast actually i want to send the packet to all interface except the one from which i receive i tried a loop but it gives me Event scheduler error with wrong event id plz help me thnks
[ns] Multiple destination
hi ya
can any one tell me how to send a packet to multiple destination
i have tried a scheme but it wont work
i put the target in the loop
this is just a code
for the demonstrtion
for (NNode *n = ntable_->node_; n != NULL; n = n->next) {
if (n->status == DIRECT && n->link != pip->src_.addr_) {
Tcl::instance().evalf("puts \"SLP send from %d to link: %d on
port %d by: %d\"",index.addr_ , n->link,n->port, pip->src_.addr_ );
//Packet *t = Agent::allocpkt();
hdr_SLRA* tslra = hdr_SLRA::access(t);
hdr_ip* tip = hdr_ip::access(t);
hdr_cmn* tcmn = hdr_cmn::access(t);
tip->daddr() = n_dest;
tip->dport() = n->port;
tip->saddr()= index.addr_;
tip->sport()= index.port_;
target_->recv(t);
}
after running the scirpt i got wrong event id error
can any body help me
