PDA

View Full Version : DSL at work (Pilots network)


rkbrown04
03-12-05, 11:11 AM
I am a helicopter pilot and I have some spare time at work and have been asked to help fix the employees network. It is a network that has both wired and wireless connections and has a DSL modem to connect to the internet. This is a network that has no manager or controls and is more a labor of love than a necessary need for our business. Or problem seems to be a problems of packet loss. I have tried several tools that do analysis on the network and it seems as if we are having greater than 50% packet loss. Any ideas where to start finding the solution?


Browser/OS = Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; iOpus-I-M; .NET CLR 1.1.4322)
Notes: Read the Analyzer FAQ if the above is not your IP address.

TCP options string = 020405980103030201010402
MTU = 1472
MTU is not fully optimized for broadband. Consider increasing your MTU to 1500 for better throughput.
MSS = 1432
MSS is not fully optimized for broadband (although it might work well for slower connections). Consider increasing your MTU value.

Default Receive Window (RWIN) = 257760
RWIN Scaling (RFC1323) = 2 bits (scale factor of 4)
Unscaled Receive Window = 64440

RWIN is a multiple of MSS
Other values for RWIN that might work well with your current MTU/MSS:
504064 (MSS x 44 * scale factor of 8)
252032 (MSS x 44 * scale factor of 4)
126016 (MSS x 44 * scale factor of 2)
63008 (MSS x 44)
bandwidth * delay product (Note this is not a speed test):

Your RcvWindow limits you to: 10310.4 kbps (1288.8 KBytes/s) @ 200ms
Your RcvWindow limits you to: 4124.16 kbps (515.52 KBytes/s) @ 500ms
MTU Discovery (RFC1191) = ON
Time to live left = 49 hops

TTL value is ok.
Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON
IP type of service field (RFC1349) = 00000000

mccoffee
03-12-05, 09:50 PM
get that mtu up to 1492 should help

YeOldeStonecat
03-15-05, 01:28 PM
I'd look into the wiring, and interference.

Wiring, how large is the office? How many network drops? Quality/condition of the patch cables?

Hubs being used? Switches?