HELP on Multicast

[Alexandre Almeida]

Hello...

I think that I need to work with multicast, to enable RIP (qaugga) and a
speedtouch router, but I dont' t understand why is MULTICAST enable on
interfaces and netstat -g don't show them.
The speedtouch receives the routes from netbsd, but the routes from the
speedtouth don't.

# netstat -gn

Virtual Interface Table is empty

Multicast Forwarding Cache is empty

mroute6pr: symbol not in namelist
# ifconfig -a
ex0: flags=8863<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST> mtu 1500
capabilities=7<IP4CSUM,TCP4CSUM,UDP4CSUM>
enabled=0
address: 00:01:02:d9:b9:c3
media: Ethernet autoselect (100baseTX full-duplex)
status: active
inet 82.155.156.15 netmask 0xff000000 broadcast 82.255.255.255
ex1: flags=8863<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST> mtu 1500
capabilities=7<IP4CSUM,TCP4CSUM,UDP4CSUM>
enabled=0
address: 00:10:5a:42:7e:20
media: Ethernet 10baseT
status: active
inet 10.0.1.202 netmask 0xffffff00 broadcast 10.0.1.255
ep0: flags=8863<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST> mtu 1500
address: 00:60:97:32:34:68
media: Ethernet 10baseT
lo0: flags=8009<UP,LOOPBACK,MULTICAST> mtu 33192
inet 127.0.0.1 netmask 0xff000000
inet alias 203.168.1.0 netmask 0xffffff00
gre0: flags=a051<UP,POINTOPOINT,RUNNING,LINK1,MULTICAST> mtu 1476
tunnel inet 82.155.147.191 --> 82.155.246.202
inet 10.0.1.203 -> 192.168.1.103 netmask 0xff000000

# netstat -ran
Routing tables

Internet:
Destination Gateway Flags Refs Use Mtu
Interface
default 10.0.1.254 UGS 2 12215 - ex1
10.0.1/24 link#2 UC 1 0 - ex1
10.0.1.254 00:0e:50:6b:cc:78 UHLc 1 462 - ex1
82/8 link#1 UC 24 0 - ex0
82.155.156.15 127.0.0.1 UGHS 0 0 33192 lo0
127/8 127.0.0.1 UGRS 0 0 33192 lo0
127.0.0.1 127.0.0.1 UH 5 116 33192 lo0
192.168.1/24 10.0.1.203 US 0 0 - gre0
192.168.1.103 10.0.1.203 UH 0 0 - gre0
203.168.1.0 203.168.1.0 UH 0 0 33192 lo0

I think that a route like 224.0.0.9 should exist, but I' really don't
understand Multicast
Also my gre tunnel don't work, but I think it's a limitation from my
speedtouth router, but gif tunnel work well.
Can some one give me any direction on multicast.
Thanks

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[Ignatios Souvatzis]

Post by Alexandre Almeida
Hello...
I think that I need to work with multicast, to enable RIP (qaugga) and a
speedtouch router, but I dont' t understand why is MULTICAST enable on
interfaces and netstat -g don't show them.
# netstat -gn
Virtual Interface Table is empty
Multicast Forwarding Cache is empty

Those are for multicast _routing_, not for the local multicasts you'd need
for routing protocols.

I've used ex and ep interfaces with IPv6, so I know that local multicasts
work with them.

Post by Alexandre Almeida
I think that a route like 224.0.0.9 should exist, but I' really don't
understand Multicast

No, that wouldn't show up as a route. You need to tell your Quagga
to listen on the right interface, most likely. Hm, can you tcpdump
on the interface you want and look for the incoming multicast reports?

Regards,
-is