[ninux-roma] Problemi sulla rete

Thu May 19 14:55:57 CEST 2016

Ciao a tutti,
ho passato 5 ore a debbuggare il problema che si e' presentato ieri,
rendendo anche la mia LAN di casa inutilizzabile...
Finalmente dovrei aver individuato ed isolato il problema.
I pacchetti OLSR che girano ovunque in rete portavano appresso dei
messaggi HNA duplicati con l'originator 172.16.46.1.
Il nodo che origina tale messaggio e' quello di Matteo ad Alberata. Mi
dispiace per Matteo, ma per il momento sono stato costretto ad isolarlo
mettendo un filtro sul traffico UDP con sorgente 172.16.46.1 sul router
"a terra" del Fusolab.
Forse c'e' un metodo per inibire la duplicazione, ma per ora non l'ho
trovato.
Sembra che ci fosse tanto tempo fa un bug di OLSR che produceva un
problema affine:
https://lists.olsr.org/pipermail/olsr-users/2010-September/004148.html
Matteo aggiorna il tuo OLSR e cerca di capire perche' invii in rete
messaggi duplicati...
Ciao
Nino

Riporto un dump un dump di parte del pacchetto OLSR incriminato....

        HNA Message (0x04), originator 172.16.46.1, ttl 105, hop 150
          vtime 124.000s, msg-seq 0x1a38, length 52
          Advertised networks (total 1)
            10.46.3.0/24, 10.46.2.0/24, 10.46.1.0/24, 10.46.0.0/24
            176.62.53.228/32
        HNA Message (0x04), originator 172.16.46.1, ttl 16, hop 239
          vtime 124.000s, msg-seq 0x9891, length 52
          Advertised networks (total 1)
            10.46.3.0/24, 10.46.2.0/24, 10.46.1.0/24, 10.46.0.0/24
            176.62.53.228/32
        HNA Message (0x04), originator 172.16.46.1, ttl 57, hop 198
          vtime 124.000s, msg-seq 0xf50b, length 52
          Advertised networks (total 1)
            10.46.3.0/24, 10.46.2.0/24, 10.46.1.0/24, 10.46.0.0/24
            176.62.53.228/32
        HNA Message (0x04), originator 172.16.46.1, ttl 101, hop 154
          vtime 124.000s, msg-seq 0x19f8, length 52
          Advertised networks (total 1)
            10.46.3.0/24, 10.46.2.0/24, 10.46.1.0/24, 10.46.0.0/24
            176.62.53.228/32
        HNA Message (0x04), originator 172.16.46.1, ttl 113, hop 142
          vtime 124.000s, msg-seq 0x1a38, length 52
          Advertised networks (total 1)
            10.46.3.0/24, 10.46.2.0/24, 10.46.1.0/24, 10.46.0.0/24
            176.62.53.228/32
        HNA Message (0x04), originator 172.16.46.1, ttl 25, hop 230
          vtime 124.000s, msg-seq 0x9891, length 52
          Advertised networks (total 1)
            10.46.3.0/24, 10.46.2.0/24, 10.46.1.0/24, 10.46.0.0/24
            176.62.53.228/32
        HNA Message (0x04), originator 172.16.46.1, ttl 62, hop 193
          vtime 124.000s, msg-seq 0xf50b, length 52
          Advertised networks (total 1)
            10.46.3.0/24, 10.46.2.0/24, 10.46.1.0/24, 10.46.0.0/24
            176.62.53.228/32
        HNA Message (0x04), originator 172.16.46.1, ttl 111, hop 144
          vtime 124.000s, msg-seq 0x1a38, length 52
          Advertised networks (total 1)
            10.46.3.0/24, 10.46.2.0/24, 10.46.1.0/24, 10.46.0.0/24
            176.62.53.228/32
        HNA Message (0x04), originator 172.16.46.1, ttl 3, hop 252
          vtime 124.000s, msg-seq 0x97f1, length 52
          Advertised networks (total 1)
            10.46.3.0/24, 10.46.2.0/24, 10.46.1.0/24, 10.46.0.0/24
            176.62.53.228/32
        HNA Message (0x04), originator 172.16.46.1, ttl 152, hop 103
          vtime 124.000s, msg-seq 0x995b, length 52
          Advertised networks (total 1)
            10.46.3.0/24, 10.46.2.0/24, 10.46.1.0/24, 10.46.0.0/24
            176.62.53.228/32
        HNA Message (0x04), originator 172.16.46.1, ttl 109, hop 146
          vtime 124.000s, msg-seq 0xf50b, length 52
          Advertised networks (total 1)
            10.46.3.0/24, 10.46.2.0/24, 10.46.1.0/24, 10.46.0.0/24
            176.62.53.228/32
        HNA Message (0x04), originator 172.16.46.1, ttl 129, hop 126
          vtime 124.000s, msg-seq 0x1a38, length 52
          Advertised networks (total 1)
            10.46.3.0/24, 10.46.2.0/24, 10.46.1.0/24, 10.46.0.0/24
            176.62.53.228/32
        HNA Message (0x04), originator 172.16.46.1, ttl 5, hop 250
          vtime 124.000s, msg-seq 0x97b9, length 52
          Advertised networks (total 1)
            10.46.3.0/24, 10.46.2.0/24, 10.46.1.0/24, 10.46.0.0/24
            176.62.53.228/32
        HNA Message (0x04), originator 172.16.46.1, ttl 32, hop 223
          vtime 124.000s, msg-seq 0x97f1, length 52
          Advertised networks (total 1)
            10.46.3.0/24, 10.46.2.0/24, 10.46.1.0/24, 10.46.0.0/24
            176.62.53.228/32
        HNA Message (0x04), originator 172.16.46.1, ttl 114, hop 141
          vtime 124.000s, msg-seq 0xf50b, length 52
          Advertised networks (total 1)
            10.46.3.0/24, 10.46.2.0/24, 10.46.1.0/24, 10.46.0.0/24
            176.62.53.228/32
        HNA Message (0x04), originator 172.16.46.1, ttl 134, hop 121
          vtime 124.000s, msg-seq 0x1a16, length 52
          Advertised networks (total 1)
            10.46.3.0/24, 10.46.2.0/24, 10.46.1.0/24, 10.46.0.0/24
            176.62.53.228/32
        HNA Message (0x04), originator 172.16.46.1, ttl 20, hop 235
          vtime 124.000s, msg-seq 0x9891, length 52
          Advertised networks (total 1)
            10.46.3.0/24, 10.46.2.0/24, 10.46.1.0/24, 10.46.0.0/24
            176.62.53.228/32
        HNA Message (0x04), originator 172.16.46.1, ttl 62, hop 193
          vtime 124.000s, msg-seq 0xf50b, length 52
          Advertised networks (total 1)
            10.46.3.0/24, 10.46.2.0/24, 10.46.1.0/24, 10.46.0.0/24
            176.62.53.228/32

On 05/19/2016 10:26 AM, Nemesis wrote:
> Ci sono problemi sulla rete, qualcuno è riuscito a capire di cosa si tratta?
>
> Nemesis
> _______________________________________________
> Roma mailing list
> Roma at ml.ninux.org
> http://ml.ninux.org/mailman/listinfo/roma