Subj : Re: Digital Radio
To   : Vk3jed
From : N1uro
Date : Sat May 22 2021 12:42 pm

-=> Vk3jed wrote to N1uro <=-

 Vk> Yeah the small MTU is a pain, but yeah it has its uses. :)

One thing that never ceases to amaze me is how versitile the flexnet protocol
is for ax.25! It adds so much more that NetRom fails to deliver... and with
ZERO additional protocol overhead! Just today, I had to reroute a flexnet
link then figured that I'd have to recode ALL the IP routing for the various
points involved.... WRONG!

I didn't have to redo a single thing! FlexNet acted as somewhat of a BGP router
and the IP magically took the new paths without me having to recode a single
IP route! Had this been NetRom it would have been a total nightmare and
a half. As proof, I used to have a 1200 baud RF path to W1EDH from my qth
but now I'm not getting any audio from EDH, I am getting signal. EDH
had a direct IP path here but now the only working IP path for it is to
K1YON. Since FlexNet auto reroutes when a new path comes online, now
the path from EDH goes:
*** W1EDH  (0-14) T=156
=>
*** route: N1URO-2 N1URO-1 K1YON-2 W1EDH-1
and without rerouting IP:
n1uro-15@n1uro.ampr.org:/uronode6: p w1edh
Ping engaged, hit <ENTER> to abort.
ICMP Echo request sent to: 44.88.8.1
ICMP Echo reply received from: 44.88.8.1
Ping completed in: 1494ms (ttl=63)
n1uro-15@n1uro.ampr.org:/uronode6:
(btw; URONode has the ability to present ANSI color if  you give yourself
the color flags <G>)
For 4 hops, at 1200 baud half duplex, that's not at all bad! It'd at least
be 1 full second longer had NetRom been in play.

One of these days I need to add IPv6 there :)

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