Written by Tom Worster on 06/02/07 05:00>>
i'm confused by the output from netstat -i:
NameMtu Network AddressIpkts Ierrs Ibytes Opkts Oerrs
Obytes Coll
bge0 1500 00:30:48:5e:56:8a 7.4M 1.2K 4.9G 2.9M 0 2.6G0
bge0 1500 65.39.221/24 www1 2.9M - 414M 3.0M - 2.5G-
it lists the same interface twice. what is the difference between these two?
this is a web server so wny so much more input bytes than output?
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The first is the ethernet address family, the other is ipv4.
If you notice, your ipv4 statistics show 414Mb in ang 2.5 Gb out, with
roughly a 1:1 ratio of input and output packets. This would seem
logical, since http is a request:response protocol. Remember that IP is
a network layer protocol, which is mainly facilitated by the ethernet
data link layer protocol, but ethernet is not simply relegated to
servicing IP communications, many other services and protocols use
ethernet. For instance, many blade/rack systems these days use some sort
of network console over ethernet, which I would assume generates far
less input bytes than output bytes on the machines. This is just one
example, there's far more things that use ethernet than I can be aware of.
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