Re: Multicast Client Problem

[debbie f. <fl...@ui...>]

At 10:33 +0200 4/22/05, Arranz Llorente, Victor wrote:
>
>When i try to send a multicast packet from a client with this command.
>
>  >./iperf -c 224.0.10.10 -u --ttl 5 -t 5 -i 1
>Or
>  >./iperf -c 224.0.10.10 -u -t 5 -i 1
>
>Its returns a "Multicast ttl failed: invalid argument"  but it 
>starts to send the packet.
>
>On the server side I put:
>
>  >./iperf -s -u -B 224.0.10.10 -i 1
>
>And recognize the client but not recognize the packets from the client.
>
>I'am using Solaris 8 (Sparc Version) and i have 5 ethernet 
>interfaces (one is the internal interface [eri0], and four is in a 
>extra board  [qfe0,qfe1,qfe3,qfe4])

you didn't say which version of iPerf you're using, the 2.01 version 
doesn't recognize the ttl flag, no matter what you try and set it to, 
it wont go, it just stays at 1.

the 1.7.0 version does somewhat better, but I know that someone else 
was having problems getting it working on solaris, here's what he did 
to fix it:

>I finally succeeded in running multicast tests on Solaris 2.8 with 
>Iperf 1.7.0 after modifying Socket.cpp (val parameter casted on 
>u_char).
>
>/* -------------------------------------------------------------------
>  * Sets the Multicast TTL for outgoing packets.
>  * ------------------------------------------------------------------- */
>
>void Socket::McastSetTTL( int val, SocketAddr &inAddr ) {
>     u_char ttl;
>
>     ttl = (u_char) val;
>#ifdef MCAST
>     if ( !inAddr.isIPv6() ) {
>         int rc = setsockopt( mSock, IPPROTO_IP, IP_MULTICAST_TTL,
>                              (char*) &ttl, sizeof(ttl));
>         WARN_errno( rc == SOCKET_ERROR, "multicast ttl" );
>     }
>#ifdef IPV6_MULTICAST_HOPS
>       else {
>         int rc = setsockopt( mSock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
>                              (char*) &val, sizeof(val));
>         WARN_errno( rc == SOCKET_ERROR, "multicast ttl" );
>     }
>#endif
>#endif
>}
>// end McastSetTTL
>
>Jean-Marc Lacroix


I hope this helps.


-- 

-debbie
Debbie Fligor, n9dn       Network Engineer, CITES, Univ. of Il
email: fl...@ui...          <http://www.uiuc.edu/ph/www/fligor>
"Every keystroke can be monitored. And the computers never forget."