1

So, I am working on this network simulation it is pretty basic.

When I initiate the first ping from 172.25.56.0/24 network to 10.151.0.0/16 network there is a loss of 2 packets. I understand, this happens because in the first two pings the arp tables are created. But I wanted to know is there a way that I can decrease these two packet drops to one packet drop.

enter image description here

Here is the .pkt file. I have created the file using Packet Tracer 6.2 in Ubuntu 14.04

Improve this question
3
  • Sometimes it is one, sometimes it is more, pings which could be dropped. There is nothing abnormal about this.
    – Ron Maupin ♦
    May 30, 2016 at 17:40
  • @Ron Maupin Okay, does this mean in a sufficiently large network even though the route is functional I might see a 0% success rate in the first ping ?
    – cRAYonhere
    May 31, 2016 at 15:28
  • You shouldn't see a 0% success rate unless there really is a problem, or you have something blocking ICMP echo and/or ICMP echo reply. You may see the first ping dropped, sometimes the first two, but rarely more than that. This can even happen on a point-to-point link between two directly connected PCs.
    – Ron Maupin ♦
    May 31, 2016 at 15:36

2 Answers 2

Reset to default
1

No, since both are creating their arp-entrys. You could decrease the drops with entering the arp-entrys yourself into the tables.
After these two initial packets there's no loss on that connection. And since it's just pings the drop doesn't matter in a practical way. But that would be a nice solution if there is one.

I would call this "ping golf". Played faster with a traceroute(6).

EDIT: Maybe I'm wrong, see comments.

Improve this answer
3
  • Thanks @Luca. one of my instructors told me that there shouldn't be a ping loss of more than one in a network. So, I was thinking it was possible some way.
    – cRAYonhere
    May 30, 2016 at 11:58
  • Well, thinking of it. The first router should send a request to the second one, asking it if it knows the IP Range. Maybe it's a timeout over than a hop?
    – alsternerd
    May 30, 2016 at 13:19
  • Yes, Luca My instructor admitted that, it was wrong and it is acceptable to lose ping in the beginning.
    – cRAYonhere
    May 31, 2016 at 15:29
-1

check the mtu size end to end, then you may have congestion somewhere specially if the packet loss in your peak time.

Improve this answer

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.