I am at a college hostel. Internet service is provided by the college through HTTP proxies 10.1.1.18 and 10.1.1.19. My ip settings are
The hostel network consists of distribution switches which connect the computers in a very unstructured manner. The (main) hostel distribution switch is connected to gateway. The proxy internet was working fine until recently when internet speed went down drastically. There is no problem with the proxies as other hostels networks using the same proxies and same structure are working fine. Also, for the same reason, broadcast packets are also not a problem.
Ironically, ping to the proxies improved when the problem occurred, earlier we used to get 3-5 ms during peak hours, but now we are getting constant <1 ms. Maybe because of reduction in traffic.
There are no Computer Science students in our hostel, and we don't know much networking to solve it ourselves. What could be the problem? I started capturing packets after starting a download. I will upload the file as soon as i figure out how can it be done, until then here are some pictures
EDIT: Heres the capture file
asked 25 Jul '15, 08:38
edited 25 Jul '15, 08:44
Now I have looked a little bit deeper in your trace file and I am wondering why ARP Request for different subnets can be seen in the tracefile??? This is really strange to me, without deeper knowledge of your network.
And there could be duplicated IP Addresses for the following addresses: 10.12.121.5 (Cabletron(MAC: 00:E0:63:C2:70:7C) and Enterasy(MAC: 00:01:F4:A6:53:91)) and 192.168.1.1 (Cabletron (MAC: 00:E0:63:C2:70:7C) and Netgear (MAC: 20:E5:2A:E4:FC:CB))
This could be the failure if one of these addresses is a gateway. (Hottest tip so far).
answered 26 Jul '15, 13:43
edited 26 Jul '15, 13:43