Re: Tools to measure TCP connection speed
Son of a biscuit, they took the commands out of my 7200's and 6500's. You used to be able to just type "ttcp" and follow some prompts, I'm not sure that Cisco ever really documented much of it though. I had found it through DOTU back in the day. Quoted from Cisco about this: "Note: The ttcp command is a hidden, unsupported, privileged mode command. As such, its availability may vary from one Cisco IOS software release to another, such that it might not exist in some releases." http://www.cisco.com/warp/public/471/ttcp.html -Wil On Mar 13, 2008, at 10:28 AM, Gabor Ivanszky wrote: Hi Wil, could you give me a pointer how ttcp could be used router to router? cheers, Gabor Wil Schultz wrote: A couple of tools I use from time to time are iperf and ttcp. I'll run iperf on some host and either run ttcp to it from a router or iperf to another host. You can also run ttcp router to router. -wil
Re: Tools to measure TCP connection speed
A couple of tools I use from time to time are iperf and ttcp. I'll run iperf on some host and either run ttcp to it from a router or iperf to another host. You can also run ttcp router to router. -wil On Mar 10, 2008, at 8:51 AM, Joe Shen wrote: we do not just want to analyze e2e performance, but to monitor network performance at IP and TCP layer. We monitor end-to-end ping with smokeping, but as you know, ICMP data does not reflect application layer permance at any time. So, we set up two hosts to measure TCP permance. Is there tools like smokeping to monitoring e2e TCP connecting speed? Joe --- "Darden, Patrick S." <[EMAIL PROTECTED]> wrote: Best way to do it is right after the SYN just count "one one thousand, two one thousand" until you get the ACK. This works best for RFC 1149 traffic, but is applicable for certain others as well. I don't know of any automated tool, per se. You really couldn't do it *well* on the software side. I see a few options: 1. this invalidates itself, but it is easily doable: get one of those ethernet cards that includes all stack processing, and write a simple driver that includes a timing mechanism and a logger. It invalidates itself because your real-life connection speeds would depend on the actual card you usually use, the OS, etc. ad nauseum, and you would be bypassing all of those. 2. if you are using a "free" as in open source OS, specifically as in Linux or FreeBSD, then you could write a simple kernel module that could do it. It would still be wrong--but depending on your skill it wouldn't be too wrong. 3. this might actually work for you. Check to see how many total TCP connections your OS can handle, make sure your TCP timeout is set to the default 15 minutes, then set up a simple perl script that simply starts a timer, opens sockets as fast as it can, and when it reaches the total the OS can handle it lets you know the time passed. Take that and divide by total number of connections and you get the average It won't be very accurate, but it will give you some kind of idea. Please forgive the humor --Patrick Darden -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Joe Shen Sent: Monday, March 10, 2008 5:00 AM To: NANGO Subject: Tools to measure TCP connection speed hi, is there any tool could measue e2e TCP connection speed? e.g. we want to measue the delay between the TCP SYN and receiving SYN ACK packet. Joe __ Search, browse and book your hotels and flights through Yahoo! Travel. http://sg.travel.yahoo.com __ Yahoo! Singapore Answers Real people. Real questions. Real answers. Share what you know at http://answers.yahoo.com.sg
RE: Tools to measure TCP connection speed
Ttcp will give you what you're looking for, but it's not something you can run in the background and forget. You have to bring it up on both ends, and while it's running, it won't even pretend to try and be friendly about bandwidth usage. It'll give you a summary after it has finished transferring whatever file(s) you feed it. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Joe Shen Sent: Monday, March 10, 2008 11:51 AM To: NANGO Subject: RE: Tools to measure TCP connection speed we do not just want to analyze e2e performance, but to monitor network performance at IP and TCP layer. We monitor end-to-end ping with smokeping, but as you know, ICMP data does not reflect application layer permance at any time. So, we set up two hosts to measure TCP permance. Is there tools like smokeping to monitoring e2e TCP connecting speed? Joe --- "Darden, Patrick S." <[EMAIL PROTECTED]> wrote: > > > Best way to do it is right after the SYN just count > "one one thousand, two one thousand" until you get > the ACK. This works best for RFC 1149 traffic, but > is applicable for certain others as well. > > I don't know of any automated tool, per se. You > really couldn't do it *well* on the software side. > I see a few options: > > 1. this invalidates itself, but it is easily > doable: get one of those ethernet cards that > includes all stack processing, and write a simple > driver that includes a timing mechanism and a > logger. It invalidates itself because your > real-life connection speeds would depend on the > actual card you usually use, the OS, etc. ad > nauseum, and you would be bypassing all of those. > > 2. if you are using a "free" as in open source OS, > specifically as in Linux or FreeBSD, then you could > write a simple kernel module that could do it. It > would still be wrong--but depending on your skill it > wouldn't be too wrong. > > 3. this might actually work for you. Check to see > how many total TCP connections your OS can handle, > make sure your TCP timeout is set to the default 15 > minutes, then set up a simple perl script that > simply starts a timer, opens sockets as fast as it > can, and when it reaches the total the OS can handle > it lets you know the time passed. Take that and > divide by total number of connections and you get > the average It won't be very accurate, but it > will give you some kind of idea. > > Please forgive the humor > > --Patrick Darden > > > > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of > Joe Shen > Sent: Monday, March 10, 2008 5:00 AM > To: NANGO > Subject: Tools to measure TCP connection speed > > > > hi, > > is there any tool could measue e2e TCP connection > speed? > > > e.g. we want to measue the delay between the TCP > SYN > and receiving SYN ACK packet. > > > Joe > > > > __ > Search, browse and book your hotels and flights > through Yahoo! Travel. > http://sg.travel.yahoo.com > __ Yahoo! Singapore Answers Real people. Real questions. Real answers. Share what you know at http://answers.yahoo.com.sg
RE: Tools to measure TCP connection speed
we do not just want to analyze e2e performance, but to monitor network performance at IP and TCP layer. We monitor end-to-end ping with smokeping, but as you know, ICMP data does not reflect application layer permance at any time. So, we set up two hosts to measure TCP permance. Is there tools like smokeping to monitoring e2e TCP connecting speed? Joe --- "Darden, Patrick S." <[EMAIL PROTECTED]> wrote: > > > Best way to do it is right after the SYN just count > "one one thousand, two one thousand" until you get > the ACK. This works best for RFC 1149 traffic, but > is applicable for certain others as well. > > I don't know of any automated tool, per se. You > really couldn't do it *well* on the software side. > I see a few options: > > 1. this invalidates itself, but it is easily > doable: get one of those ethernet cards that > includes all stack processing, and write a simple > driver that includes a timing mechanism and a > logger. It invalidates itself because your > real-life connection speeds would depend on the > actual card you usually use, the OS, etc. ad > nauseum, and you would be bypassing all of those. > > 2. if you are using a "free" as in open source OS, > specifically as in Linux or FreeBSD, then you could > write a simple kernel module that could do it. It > would still be wrong--but depending on your skill it > wouldn't be too wrong. > > 3. this might actually work for you. Check to see > how many total TCP connections your OS can handle, > make sure your TCP timeout is set to the default 15 > minutes, then set up a simple perl script that > simply starts a timer, opens sockets as fast as it > can, and when it reaches the total the OS can handle > it lets you know the time passed. Take that and > divide by total number of connections and you get > the average It won't be very accurate, but it > will give you some kind of idea. > > Please forgive the humor > > --Patrick Darden > > > > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of > Joe Shen > Sent: Monday, March 10, 2008 5:00 AM > To: NANGO > Subject: Tools to measure TCP connection speed > > > > hi, > > is there any tool could measue e2e TCP connection > speed? > > > e.g. we want to measue the delay between the TCP > SYN > and receiving SYN ACK packet. > > > Joe > > > > __ > Search, browse and book your hotels and flights > through Yahoo! Travel. > http://sg.travel.yahoo.com > __ Yahoo! Singapore Answers Real people. Real questions. Real answers. Share what you know at http://answers.yahoo.com.sg
Re: Tools to measure TCP connection speed
On Mon, Mar 10, 2008 at 4:00 AM, Joe Shen <[EMAIL PROTECTED]> wrote: > > hi, > > is there any tool could measue e2e TCP connection > speed? > > > e.g. we want to measue the delay between the TCP SYN > and receiving SYN ACK packet. So, all you want to know is basic RTT? Do you want to know about the network? or the hosts? or the whole 'system' ? One simple thing might be to just use WireShark which can calculate the various timings on an individual tcp-session basis. Another poster suggests tcpdump, also a fine solution... -Chris
RE: Tools to measure TCP connection speed
We use LAN Traffic v2 to test speeds on our network. http://www.omnicor.com/netest.htm - Michienne Dixon Network Administrator liNKCity 312 Armour Rd North Kansas City, MO 64116 www.linkcity.org (816) 412-7990 From: Joe Shen Sent: Mon 3/10/2008 4:00 AM To: NANGO Subject: Tools to measure TCP connection speed hi, is there any tool could measue e2e TCP connection speed? e.g. we want to measue the delay between the TCP SYN and receiving SYN ACK packet. Joe __ Search, browse and book your hotels and flights through Yahoo! Travel. http://sg.travel.yahoo.com
RE: Tools to measure TCP connection speed
> > On 2008-03-10, Joe Shen <[EMAIL PROTECTED]> wrote: > > is there any tool could measue e2e TCP connection speed? > WireShark, which also has a basic analysis package built-in for error and connection setup statistics. -- Scanned for viruses and dangerous content at http://www.oneunified.net and is believed to be clean.
Re: Tools to measure TCP connection speed
On 2008-03-10, Joe Shen <[EMAIL PROTECTED]> wrote: > is there any tool could measue e2e TCP connection > speed? hping (or tcpdump while you make a connection by any method).
RE: Tools to measure TCP connection speed
Best way to do it is right after the SYN just count "one one thousand, two one thousand" until you get the ACK. This works best for RFC 1149 traffic, but is applicable for certain others as well. I don't know of any automated tool, per se. You really couldn't do it *well* on the software side. I see a few options: 1. this invalidates itself, but it is easily doable: get one of those ethernet cards that includes all stack processing, and write a simple driver that includes a timing mechanism and a logger. It invalidates itself because your real-life connection speeds would depend on the actual card you usually use, the OS, etc. ad nauseum, and you would be bypassing all of those. 2. if you are using a "free" as in open source OS, specifically as in Linux or FreeBSD, then you could write a simple kernel module that could do it. It would still be wrong--but depending on your skill it wouldn't be too wrong. 3. this might actually work for you. Check to see how many total TCP connections your OS can handle, make sure your TCP timeout is set to the default 15 minutes, then set up a simple perl script that simply starts a timer, opens sockets as fast as it can, and when it reaches the total the OS can handle it lets you know the time passed. Take that and divide by total number of connections and you get the average It won't be very accurate, but it will give you some kind of idea. Please forgive the humor --Patrick Darden -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Joe Shen Sent: Monday, March 10, 2008 5:00 AM To: NANGO Subject: Tools to measure TCP connection speed hi, is there any tool could measue e2e TCP connection speed? e.g. we want to measue the delay between the TCP SYN and receiving SYN ACK packet. Joe __ Search, browse and book your hotels and flights through Yahoo! Travel. http://sg.travel.yahoo.com
Tools to measure TCP connection speed
hi, is there any tool could measue e2e TCP connection speed? e.g. we want to measue the delay between the TCP SYN and receiving SYN ACK packet. Joe __ Search, browse and book your hotels and flights through Yahoo! Travel. http://sg.travel.yahoo.com
