Forwarding of UDP Multicast

Albert van Dam albert at ipdevelopers.co.za
Thu Jul 22 14:00:15 BST 2004


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Hi All

I am a newbie to FreeBSD.

We have the following setup in a lab environment:

* PC1 (IP: 192.168.10.2/24) connected with cross over to wireless router
A (IP: 192.168.10.1/24 - sis0)

* PC2 (IP: 192.168.20.2/24) connected with cross over to wireless router
B (IP: 192.168.20.1/24 - sis0)

* Wireless router A (IP: 192.168.30.1/24 - wi0) connected with 802.11b
to Wireless router B (IP: 192.168.30.2/24 - wi1)

PC1 can ping PC2 and PC2 can ping PC1.

Both Wireless router A and Wireless router B runs FreeBSD. The routing
on this works but I cannot get UDP Multicast packets through. I have
read in the FreeBSD docs that mrouted should be running and subsequently
I have it running on both routers.

Tcpdump shows the UDP multicast packets on Wireless router A from PC1 on
sis0 and UDP multicast packets on Wireless router B from PC2 on sis0. 

Any help would be greatly appreciated.

Albert


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<DIV><FONT face=3DArial size=3D2><FONT size=3D2>
<P>Hi All</P>
<P>I am a newbie to FreeBSD.</P>
<P>We have the following setup in a lab environment:</P>
<P>* PC1 (IP: 192.168.10.2/24) connected with cross over to wireless =
router A=20
(IP: 192.168.10.1/24 - sis0)</P>
<P>* PC2 (IP: 192.168.20.2/24) connected with cross over to wireless =
router B=20
(IP: 192.168.20.1/24 - sis0)</P>
<P>* Wireless router A (IP: 192.168.30.1/24 - wi0) connected with =
802.11b to=20
Wireless router B (IP: 192.168.30.2/24 - wi1)</P>
<P>PC1 can ping PC2 and PC2 can ping PC1.</P>
<P>Both Wireless router A and Wireless router B runs FreeBSD. The =
routing on=20
this works but I cannot get UDP Multicast packets through. I have read =
in the=20
FreeBSD docs that mrouted should be running and subsequently I have it =
running=20
on both routers.</P>
<P>Tcpdump shows the UDP multicast packets on Wireless router A from PC1 =
on sis0=20
and UDP multicast packets on Wireless router B from PC2 on sis0. </P>
<P>Any help would be greatly appreciated.</P>
<P>Albert</P></FONT></FONT></DIV></BODY></HTML>

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