multicast routing with mrouted

multicast routing with mrouted

Post by Shaun Jackma » Fri, 05 Oct 2001 06:18:18



I have two multicast hosts with a multicast router inbetween (Linux 2.4.10,
mrouted). I ran mrouted with the debug switch, and watched the output.
Mrouted seems to be querying, and understanding the IGMP reports just fine,
but it's not routing any multicast packets. I followed all the
Multicast-howtos I could get my hands on, but without any luck. I've
attached the dumps from mrouted.

Thanks,
Shaun

mrouted version 3.9-beta3 up  1:17:54 Wed Oct  3 15:16:21 2001

Multicast Routing Cache Table (3 entries)
 Origin             Mcast-group         CTmr     Age      Ptmr Rx IVif
Forwvifs
<(prunesrc:vif[idx]/tmr) prunebitmap

Quote:>Source             Lifetime SavPkt         Pkts    Bytes RPFf

 192.168.0/24       239.255.237.255  0:04:58  1:17:52        -  -  0   1
Quote:>192.168.0.3         0:01:08      0            2       88    0

 192.168.2/24       239.255.237.255  0:01:38  0:16:27        -  -  1

Quote:>192.168.2.1         0:15:01      0           14      556    0
>192.168.2.99        0:16:27      0           11      544    0

mrouted version 3.9-beta3 up  1:17:53 Wed Oct  3 15:16:20 2001

vifs_with_neighbors = 0

Virtual Interface Table
Vif  Name  Local-Address                               M  Thr  Rate   Flags
 0   eth0  192.168.0.116   subnet: 192.168.0/24        1   1      0  
querier leaf
           group host (time left): 224.0.0.4       192.168.0.116   (
0:03:27)
                                   224.0.0.2       192.168.0.116   (
0:03:28)
                     IGMP querier: 192.168.0.116      (this system)
                      Nbr bitmaps: 0x0000000000000000
                   pkts/bytes in : 39/1296
                   pkts/bytes out: 5/280

 1   eth1  192.168.2.1     subnet: 192.168.2/24        1   1      0  
querier leaf force_leaf
           group host (time left): 239.255.237.1   192.168.2.99    (
0:03:24)
                                   239.255.237.255 192.168.2.1     (
0:03:24)
                                   224.0.0.4       192.168.2.1     (
0:03:33)
                                   224.0.0.2       192.168.2.1     (
0:03:25)
                     IGMP querier: 192.168.2.1        (this system)
                      Nbr bitmaps: 0x0000000000000000
                   pkts/bytes in : 32/1408
                   pkts/bytes out: 0/0

 2   eth2  192.168.10.1    subnet: 192.168.10/24       1   1      0  
disabled
                      Nbr bitmaps: 0x0000000000000000

Multicast Routing Table (2 entries)
 Origin-Subnet      From-Gateway    Metric Tmr Fl In-Vif  Out-Vifs
 192.168.2/24                          1    85 ..   1    0*
 192.168.0/24                          1    85 ..   0    1*

 
 
 

1. mrouted - multicast routing, please help !

Hi everybody,
I need to make some experiments for my multicast congestion control
masterthesis, so I deployed a laboratory with some linux routing
boxes. I compiled the kernel to act as a multicast router (and also to
make tunneling) and installed mrouted (I found an rmp version of it,
76kbytes, is it right?), but it still doesn't route any multicast
packet. I see (with the debug option) that mrouted detectes the
multicast join, but it doesn't route. I have so few time to complete
my masterthesis, can anybody help me fast?
Thanks.

Alessandro Ghioni
CEFRIEL
Network Systems Area.

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