# Brouting

If 10 machines can act as brouter how does QNX choose which machine will do
the brouting?

• Mario

“Operating System Tech Support” <os@qnx.com> wrote in message
news:9qmlno\$qqc\$1@nntp.qnx.com

“Mario Charest” <> mcharest@voidzinformatic.com> > wrote in message
news:9qlblt\$jc4\$> 1@inn.qnx.com> …

If 10 machines can act as brouter how does QNX choose which machine will
do
the brouting?

It always chooses the one with the lowest number of intermediate networks,
which it figures is probably the fastest.

What if there are 10s path that have the same number of “hops”.

Imagine a setup like node 1 to 10 have two lans and node
11 to 20 have 1 lan connected to lan 1 and 21 to 31 are connecte
to lan 2. Any machine (11-20) can talk to machine (21-31), but
which nodes (1-10) is it going to use?

“Mario Charest” <mcharest@voidzinformatic.com> wrote in message
news:9qlblt\$jc4\$1@inn.qnx.com

If 10 machines can act as brouter how does QNX choose which machine will
do
the brouting?

It always chooses the one with the lowest number of intermediate networks,
which it figures is probably the fastest.

“Operating System Tech Support” <os@qnx.com> wrote in message
news:9qpprc\$psa\$1@nntp.qnx.com

“Mario Charest” <> mcharest@clipzinformatic.com> > wrote in message
news:9qmq7d\$gsk\$> 1@inn.qnx.com> …
What if there are 10s path that have the same number of “hops”.

I figured that you’d follow up with a more “interesting” example >

AFAIK, the order would (after having the same # of “hops”) would be the
order presented in the broute list.

Ok that’s the info I was looking for thanks

“Mario Charest” <mcharest@clipzinformatic.com> wrote in message
news:9qmq7d\$gsk\$1@inn.qnx.com

What if there are 10s path that have the same number of “hops”.

I figured that you’d follow up with a more “interesting” example

AFAIK, the order would (after having the same # of “hops”) would be the
order presented in the broute list.

Keep in mind that Fleet was not meant to challenge IP for routing (so it’s
choice mechanism is rather simplistic). To see a list of “next nodes” do a
netmap -b ; there is no way to edit/remove entries from this list, but they
are recalculated at the following times:

2. a driver is started up, resulting in a netmap entry added
3. a packet from an unknow node is rxd, resulting in a netmap entry added.

“Mario Charest” <mcharest@voidzinformatic.com> wrote in message
news:9qq10p\$iem\$1@inn.qnx.com

“Operating System Tech Support” <> os@qnx.com> > wrote in message
news:9qpprc\$psa\$> 1@nntp.qnx.com> …
“Mario Charest” <> mcharest@clipzinformatic.com> > wrote in message
news:9qmq7d\$gsk\$> 1@inn.qnx.com> …
What if there are 10s path that have the same number of “hops”.

I figured that you’d follow up with a more “interesting” example >

AFAIK, the order would (after having the same # of “hops”) would be the
order presented in the broute list.

Ok that’s the info I was looking for thanks

No problem.