What is the MTU size of loopback?
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Wednesday, January 30, 2013 3:51 PM
What is the MTU size of loopback? What does the 4294967295 mean and how is that used?
We all have seen this:
C:\Users\me>netsh interface ipv4 show interfaces
Idx Met MTU State Name
--- ---------- ---------- ------------ ---------------------------
1 50 4294967295 connected Loopback Pseudo-Interface 1
10 10 1500 connected Local Area ConnectionI have a Client/Server (APP/DB) running inside the same Server 2008 R2 and it does a LOT of TCP/IP using loopback 127.0.0.1. Jboss to Database. Network is VERY busy in "Resource Monitor". I know that inside the box memory is lightning speed and I am sure the TCP/IP stack (subsystem) is doing fine - but I am just curious. I tried doing some Google research and to my surprise, no one has really asked this. Is there ANY tuning I can do? Is there any way to see (using some tool) the packets sizes being used between the APP and the DB processes? "netstat -an" looks good too. Thank you
All Replies
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Wednesday, January 30, 2013 9:34 PM
0xFFFFFFFF
2^32
So basically this means maximum possible value.
There;s a special tuning for a loopback connection within TCP stack on Windows 2012 / 8 but you need to be an application developer to take care of it. It should be toggled ON and OFF on both sides on an application. No registry tricks here. See this:
- Marked As Answer by Cheers ZHANGMicrosoft Contingent Staff, Moderator Wednesday, February 06, 2013 7:21 AM
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