Without knowing the details regarding the packet path it is difficult to provide any specific troubleshooting advice.
I would start by inspecting the physical packet path, which has been suggested. Duplex mismatches are a common culprit for packet loss. If one side of an ethernet segment is hard coded and the other is set to auto negotiate, the auto negotiate fails and cisco defaults to 100 half on Fast Ethernet and 1000 Full on gig. I'm sure you could see how the Fast Ethernet default could cause problems.
The other thing to consider is icmp is not a priority protocol. Meaning, if you are pinging a router or switch, and that switch has something more important to do, it may drop or delay the icmp response. You could try increasing the timeout on the ping to see if maybe you are getting the ping back, but outside the default timeout value. You could try to do a capture as well, which has been suggested, but ideally I would try to ping THROUGH the network devices instead of TO the network devices.
You may also consider any shaping that may be done on physical or logical interface to see if you could be getting queue drops due to shaping.
We have 3 identical switches configured by someone else and would like to claim some of the Gigabit ports(G1/G2/G3/G4) for use on servers. When we try to change the wiring and configuration, we run in to connectivity issues. Attached is a des...
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...