hello..can anyone explain to me about tcp as i am trying to map a mrtg on tcp..how do i create mrtg on tcp total bandwidth.is it the sum of tcp in segment & tcp out segment are the total tcp bandwidth?i am really confuse..i do a snmpwalk to get the mib for my dell switch powerconnect3424 and got these:

tcpRtoAlgorithm.0
tcpRtoMin.0
tcpRtoMax.0
tcpMaxConn.0
tcpActiveOpens.0
tcpPassiveOpens.0
tcpAttemptFails.0
tcpEstabResets.0
tcpCurrEstab.0
tcpInSegs.0
tcpOutSegs.0
tcpRetransSegs.0

by using one or two from above, i can make a total tcp bandwidth graph with mrtg right?!

not from those stats. the best you'll get is an approximation of packet count. approximate because it probably doesn't count fragments and may not include retransmits (in tcpIn/OutSegs).

not too familiar with mrtg, though, so I don't know if there are other methods it can use to get your data.

tcp packet?!how to i get the tcp packet?!..emm..its really getting confusing.

tcpInSegs.0
tcpOutSegs.0
tcpRetransSegs.0

segments are packets, loosely speaking

so..does it mean by adding the values of in and out segment, it total up the tcp bandwidth?!..

no. packet count will not give you bandwidth. packets are generally of different sizes. for example, you could generate 1000 packets in a telnet session averaging 2-3 bytes of tcp payload, or 1000 in a file transfer averaging 1400 bytes of tcp payload. packet count won't tell you which case has occurred.

make sense?

ok...any idea on capturing the bandwidth for tcp?!..packet is not the same as bandwidth..i get it..how do it get the packet size and total it up to orm a bandwidth graph?

I don't know mrtg well, but i'm not convince that it can do this.

try looking here, maybe

http://www.ubuntugeek.com/bandwidth-...for-linux.html

thanks anyway..i really need to use mrtg on this.

when there's a will..there's a way.