Message: 3 Date: Tue, 2 Jul 2013 09:25:31 +0200 From: Antonio Quartulli ordex@autistici.org To: The list for a Better Approach To Mobile Ad-hoc Networking b.a.t.m.a.n@lists.open-mesh.org Subject: Re: [B.A.T.M.A.N.] ttcrc value Message-ID: 20130702072531.GA2325@ritirata.org Content-Type: text/plain; charset="utf-8"

On Tue, Jul 02, 2013 at 11:28:48AM +0530, ajeet singh wrote:

...

Hello all, We are getting the same value of ttcrc always even after restarting the nodes.

Please check the bellow TCPDUMP log,

Log 1 09:05:17.118462 BAT f4:7b:5e:88:7d:a0: OGM IV via neigh f4:7b:5e:88:7d:a0, seq 2246235905, tq 255, ttvn 1, ttcrc 15939, ttl 50, v 14, flags [...F.], length 26 09:05:17.118764 BAT f4:7b:5e:88:7d:a0: OGM IV via neigh f4:7b:5e:88:7d:a0, seq 2246235905, tq 255, ttvn 1, ttcrc 15939, ttl 50, v 14, flags [...F.], length 26

Log 2 ( After restart) 00:12:29.480397 BAT f6:7b:5e:88:7d:a0: OGM IV via neigh aa:aa:03:00:00:00, seq 2864163091, tq 255, ttvn 1, ttcrc 15939, ttl 2, v 14, flags [.....], length 26 00:12:29.520254 BAT f4:7b:5e:88:7d:a0: OGM IV via neigh aa:aa:03:00:00:00, seq 31648486, tq 255, ttvn 1, ttcrc 15939, ttl 50, v 14, flags [...F.], length 26 00:12:32.488390 BAT f6:7b:5e:88:7d:a0: OGM IV via neigh aa:aa:03:00:00:00, seq 2864163092, tq 255, ttvn 1, ttcrc 15939, ttl 2, v 14, flags [.....], length 26 00:12:32.536432 BAT f4:7b:5e:88:7d:a0: OGM IV via neigh aa:aa:03:00:00:00, seq 31648487, tq 255, ttvn 1, ttcrc 15939, ttl 50, v 14, flags [...F.], length 26

Is it normal operation?

The TTCRC is computed based _only_ on the address addresses listed in the local table. There is no randomness involved, therefore, if the addresses in the table are always the same, then also the TTCRC will stay the same.

Is this the case?

cheers,

-- Antonio Quartulli

..each of us alone is worth nothing.. Ernesto "Che" Guevara