multicast routing

[Ivo Hazmuk]

Ahoj,

On Thu, 22 Nov 2012, Josef Hrabec wrote:

> nemate nekdo prosim nejake zkusenosti s routovanim multicastu z jedne sitove
> karty na druhou? Potreboval bych "jednoduse" multicast packety vyskytujici
> se na jednom subnetu predat/prekopirovat do druheho subnetu a obracene.
> Skompiloval jsem proto jadro s option MROUTING a nainstaloval
> /usr/ports/net/mrouted.

kolega napsal presne pro tento ucel aplikaci mcrep. Potrebujeme presypavat 
multicast z fakulty na koleje. Zkusim to zitra pohledat.

 	I.
>
> Po spusteni mrouted vsak zahlasi:
>
> Starting mrouted.
> mrouted: 00:15:06.279 warning - sendto to 224.0.0.1 on 10.1.6.44: Invalid
> argument
> mrouted: 00:15:06.279 warning - sendto to 224.0.0.4 on 10.1.6.44: Invalid
> argument
> mrouted: 00:15:06.280 warning - sendto to 224.0.0.1 on 1.1.1.1: Invalid
> argument
> mrouted: 00:15:06.280 warning - sendto to 224.0.0.4 on 1.1.1.1: Invalid
> argument
>
> Router ma tyto dve sitova rozhrani:
> em0: flags=8a43<UP,BROADCAST,RUNNING,ALLMULTI,SIMPLEX,MULTICAST> metric 0
> mtu 1500
>       options=9b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM>
>       ether 08:00:27:6d:e0:0d
>       inet 10.1.6.44 netmask 0xffffff80 broadcast 10.104.6.128
>       media: Ethernet autoselect (1000baseT <full-duplex>)
>       status: active
> em1: flags=8a43<UP,BROADCAST,RUNNING,ALLMULTI,SIMPLEX,MULTICAST> metric 0
> mtu 1500
>       options=9b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM>
>       ether 08:00:27:af:7c:53
>       inet 1.1.1.1 netmask 0xfffffffc broadcast 1.1.1.3
>       media: Ethernet autoselect (1000baseT <full-duplex>)
>       status: active
>
> Pokud pustim tcpdump na em0 a hledam pakety zaslane na 224.0.0.1 nebo na
> 224.0.0.4, tak se nic neukaze.
> (router nema firewall)
>
> Ale dost mozna, ze routovani multicastu na FreeBSD (zkousel jsem 7.3 a 8.3
> se stejnym vysledkem) neni zrovna dobry napad.  :-)
>
> Predem dekuji, za jakekoliv podnety.
> Pepa
>
>
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