Discussion:
Sending and receiving packets from multiple lines
Randi Botse
2013-03-23 02:52:41 UTC
Permalink
Hi All,

My network implements interface bonding, aggregate several lines into
one logical line to achieve higher connection throughput and
redundancy.
I'm writing a network application in Linux that basically send packets
to another host outside. I got problem with packet ordering on
destination host, for example. packet1 from line1 should arrived
earlier than packet3 from line3, etc. I want them to be delivered in
correct order. Is this possible? if yes, what is the better way for
doing this?.

Thanks
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Celelibi
2013-03-23 16:42:40 UTC
Permalink
Hello,

TCP should reorder packet fragments.
If you're using UDP or a custom protocol over IP, you have absolutemy
no guarantee about the delivery of packets.
Post by Randi Botse
Hi All,
My network implements interface bonding, aggregate several lines into
one logical line to achieve higher connection throughput and
redundancy.
I'm writing a network application in Linux that basically send packets
to another host outside. I got problem with packet ordering on
destination host, for example. packet1 from line1 should arrived
earlier than packet3 from line3, etc. I want them to be delivered in
correct order. Is this possible? if yes, what is the better way for
doing this?.
Thanks
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linux-c-programming" in
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Nicholas Mc Guire
2013-03-24 10:58:10 UTC
Permalink
Post by Celelibi
Hello,
TCP should reorder packet fragments.
If you're using UDP or a custom protocol over IP, you have absolutemy
no guarantee about the delivery of packets.
Post by Randi Botse
Hi All,
My network implements interface bonding, aggregate several lines into
one logical line to achieve higher connection throughput and
redundancy.
I'm writing a network application in Linux that basically send packets
to another host outside. I got problem with packet ordering on
destination host, for example. packet1 from line1 should arrived
earlier than packet3 from line3, etc. I want them to be delivered in
correct order. Is this possible? if yes, what is the better way for
doing this?.
you can implement that your self of course but it probably would be better
to use channel bonding to do that and then send all the data over the bond
device and let the kernel take care of ordering issues - handling all the
corener cases of losing single lines, notably temporarily is a pain in the but.

Also with the use of bondign devices you get all the benifits of clean
firewall and traffic control handling at kernel level - I doubt it is resonable
to handle this over multiple distinct lines in a meaningful way (with finite
effort that is...)

thx
hofrat
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