Solwise SAR715PVW, Инструкции по установке

Страница: 185 / 202

Solwise SAR715PVW ADSL Ethernet Router User’s Guide Chapter 13 . Appendix B Troubleshooting
185
see the options available to you) command and checking the IP
statistics. For example, note the Datagram is the MTU.
IP Statistics
Packets Received = 152113
Received Header Errors = 0
Received Address Errors = 0
Datagrams Forwarded = 0
Unknown Protocols Received = 0
Received Packets Discarded = 0
Received Packets Delivered = 152113
Output Requests = 122510
Routing Discards = 0
Discarded Output Packets = 0
Output Packet No Route = 0
Reassembly Required = 0
Reassembly Successful = 0
Reassembly Failures = 0
Datagrams Successfully Fragmented = 0
Datagrams Failing Fragmentation = 0
Fragments Created = 0
Another problem to check out is whether or not you are having
excessive retransmissions. The lower your retransmit rate
(Segments Sent/Segments Retransmitted) the better. If you have a
retransmit rate in Windows, check Microsoft there are some
patches can fix this type of problem. In this example (using netstat -
s), the rate is about 1.5%. Note the Segment is the MSS.
TCP Statistics
Active Opens = 476
Passive Opens = 22
Failed Connection Attempts = 27
Reset Connections = 219
Current Connections = 10
Segments Received = 149817
S egments Sent = 117832
Segments Retransmitted = 1820
13.6.4 So how do I set the MTU value on my Windows PC?
In order to alter the MTU value on a Windows systems involves
modifying the registry. Personally I use an MTU value of 1200
decimal (hex 4B0). You might get away with a higher value but I find
that 1200
always works.
The easiest way to modify the MTU value in your Windows registry
is to use the DrTCP utility. A copy of this utility is included on the
manuals/drivers CD supplied with your router. Alternatively it can be
downloaded at
http://www.dslreports.com/front/drtcp.html
Run DrTCP and a screen similar to this…. Is shown: