|
|
| Tool |
Contact |
Implementation |
Functionality |
Limitations |
| BitWizard |
BitWizard B.V. |
$$ |
investigate client-server software without actually setting up a WAN system |
Linux |
| REAL |
S. Keshav
Warren Toomey's searchable archive
|
- Based on a modified NEST 2.5
- IP layer WAN simulator
- diff srcs: generic/reno/tahoe dist-style sources like poisson (maybe tcplib?)
- dsts: ACK-sending pkt sinks
- routers: can configure queueing/dropping functions (first/last/random/fq/hrr,decbit) |
flow, congestion control schemes
input:
- topology
- protocols
- workload
- cntrl params
output e.g.,
- packets/src
- q.ing delays
- lost, rexmits
|
- no linklayer (eg.CSMA/DQDB)
- just full-duplex links betw. nodes
- no data xfer
- (unlike xkernel (full protocol sim))
|
| ns (LBL) |
NRG, LBL
ns@ee.lbl.gov
McCanne
Floyd |
- extension of Tcl
- from Keshav's REAL |
- extensible
- event driven
- supports several TCPs
- supports router scheduling algorithms |
|
| Opnet Modeler |
info@mil3.com |
$$ |
- scalable
- write code
access to code?
- good level 3 network design methodology
- reasonably fast
- pentium version
|
|
| VINT - Virtual InterNetwork Testbed |
Ahmed Helmy
Satish Kumar |
ns-2
nam
(has Libs of net topologies and traffic generators)
|
- Study of scale and protocol interaction in the context of current and future network protocols |
newnam - under development
|
| MaRS- Maryland Routing Simulator |
Ibrahim Matta
NEU |
implemented in C on a UNIX platform with two graphical interface (Xlib and Motif)
|
simulation testbed for evaluating routing systems |
|
Cooperative Association for Internet Data Analysis (CAIDA)