Bug#783160: ax25-tools: The most part of IP-over-AX25 outbound packets
Iain et al;
Like with xNOS, the TCP MSS needs to be set per interface, also Ugo
doesn't specify which mode he's using (VC vs. DG) The "out of sequence"
frames may be caused by using datagram mode instead of virtual circuit
mode. IP over RF works best in a virtual circuit mode which is what
NetRom uses as well. Datagram mode often can (and will) drop frames thus
making them appear "out of order".
With a properly set interface, the ip window will auto-adjust within the
maximum limit specified within the parameters of the interface. While
finding the setting is a bit obscure IMHO, it can be done.
>From the URONode at tapr.org mail list:
iptables -t mangle -A POSTROUTING -o <interface> -p tcp --tcp-flags
SYN,RST SYN -j TCPMSS --set-mss 216
Since your send is outbound only, this is fine. Your interfaces for the
above would be for a standard ax25 only interface (ie: ax0/ax1/etc). For
a NetRom interface (ie: nr0/nr1/etc) subtract another 20 from the ending
216 to make room for the protocol headers of NetRom. Repeat the above
for UDP if required.
Iain, I can have a discussion with you offlist re: LinBPQ if you wish
and save you some time.
--
The most difficult egg to beat is one that is hard boiled.
73 de Brian Rogers - N1URO
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