![]() This could be for a couple of reasons, but the most common one is that the device at TTL=5 deprioritized the packet, or is configured to not respond at all to the particular packet type I sent. What does that mean?Īnytime you see an asterisk, it means that no response was received. All we got back were three asterisks (***). ![]() Hops 5, 6, 7, and 9 look a little different though. This is because it sends 3 packets to each hop so that we can get a general idea of the latency (response time). Hop 1 is my local router’s hostname, IP address, and then there are 3 times. The first line after the command states that it is running a traceroute to this domain (this IP address), 64 hops max (TTL=64), and the packet size is 52 bytes (which is relatively nothing). This goes on until your computer receives a response from the intended target, after which you should have a pretty good map of the network and an idea of how long each hop took to respond. The next packet your computer sends out will have a TTL of 2, and then 3, and then 4, and then….well, you get the idea. You’ll need a whole lot more TTL if you want to get past me, your router!” Your computer then notes the device it reached (your router) and the time it took to receive that response. The router will then send a message back to your computer to say, “Hey, you're out of TTL. The first packet that traceroute sends out has a TTL of 1, which means once it reaches the first hop (typically your local router), TTL will be set to 0. Traceroute takes advantage of this in order to discover all of the devices between the computer sending the packets and the final destination. Whenever a packet reaches a hop, the TTL value is reduced by 1 until it reaches the final destination, or TTL=0. What does TTL have to do with traceroute? If it gets to hop 31, then that device will send that packet to the data graveyard. ![]() For example, if my data packet has a TTL of 30, it can only travel through 30 hops. TTL specifies the number of devices, or hops, the packet can travel through before being tossed out. This data packet contains a field called Time to Live, or TTL. When you start a traceroute, your machine will create a data packet and then send that packet out to the network. It helps answer questions like: why can’t I connect to the VPN? Why is Netflix buffering? Why is the Internet so slow? ![]() Network technicians use this to determine what could be causing a network resource to be failing. #1449 - 08/17/05 05:32 AM Re: MultiPing vs.Traceroute (or tracert) is a command line tool that is used to map out the network and get an idea of how long it takes to send and receive data to specific endpoints. The fact that PingPlotter doesn't show packet loss is a warning sign that the packet loss shown in MultiPing might be just because of a router configured to drop certain types of packets - and that the network may be functioning just fine. Make sure you're correlating packet loss in MultiPing back to a network disturbance of some kind. Once we determine the difference between PingPlotter and MultiPing's data (ie: why MultiPing shows packet loss and PingPlotter doesn't), then we can try to get PingPlotter to show the same packet loss that MultiPing does.Ī warning here, though. The data you collect that way won't be helpful to your ISP, though. The discrepancy between MultiPing and PingPlotter is what I'm chasing down here (and the suggestion with going final destination only in PingPlotter). Sending the data to PingPlotter just moves the data over - it doesn't actually capture the route, which is what your ISP needs. MultiPing) and we'll see if we can see anything else that might make them work differently. If you still can't get things working the same, then email your ini files (PingPlotter.ini for PIngPlotter, MultiPing.ini for. If you get through all the above and still can't see a difference, let us know and we'll tell you how to do that. If that doesn't show any difference, then the only thing left is to change the packet type in PingPlotter to match MultiPing. If these are all the same and you still see different results between the two, try switching PingPlotter to ping the final destination only (View -> Ignore first hops -> Ping Final Hop Only). Also, make sure your "Timeout speed" in PingPlotter matches your "Ping Timeout" in MultiPing and that your trace interval is the same. MultiPing only supports ICMP packets - so in PingPlotter, you want to pick "ICMP Using Windows DLL (default)" as the packet type. You probably are, but we've had numerous situations where we're helping someone solve a problem like this, just to find out that there was some difference in the targets being traced / pinged. The first thing to check is that you're actually going against the same target.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |