This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C2C8AB.4EF8B480 Content-Type: text/plain; charset="iso-8859-1" well, once i figured out what to do it was easy. 1) install freebsd over linux. 2) recompile kernel with: option MROUTING 3) start mrouted 4) go get yourself a cold beer. you deserve it! thanks! -bob CONFIDENTIALITY NOTICE: The information in this electronic mail transmission contains confidential information intended only for the use of the individual or entity named above. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copy of the transmission is strictly prohibited. -----Original Message----- From: Bob Yeaw [mailto:byeaw@widevine.com] Sent: Wednesday, January 29, 2003 9:42 AM To: 'lartc@mailman.ds9a.nl' Subject: [LARTC] building a multicast router Hi, I have been reading: http://lartc.org/howto/lartc.multicast.html <http://lartc.org/howto/lartc.multicast.html> in effort to understand how to route multicast traffic and just joined the group. History: I am trying to multicast mpeg (using the videolan server) on a private network. The server side of the network is copper gigabit, which connects to one of those cheap fast Ethernet switches with a single gigabit uplink. The problem I'm having is the ports are getting flooded on the client side switch (i.e., all multicast traffic sent to all ports on the switch). After doing some research it sounds like installing a multicast router between the client and server side is the best solution. So that's what I'm trying to do now. I have Red hat Linux 7.3 installed. I've gone through the steps described on the how-to (link above): $ demsg | grep IGMP IP Protocols: ICMP, UDP, TCP, IGMP $ cat /proc/sys/net/ipv4/ip_forward 1 $ netstat -rn Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 192.168.3.0 0.0.0.0 255.255.255.0 U 40 0 0 eth1 10.100.100.0 0.0.0.0 255.255.255.0 U 40 0 0 eth0 127.0.0.0 0.0.0.0 255.0.0.0 U 40 0 0 lo 224.0.0.0 0.0.0.0 240.0.0.0 U 40 0 0 eth1 0.0.0.0 10.100.100.254 0.0.0.0 UG 40 0 0 eth0 # NOTE: eth1 is the client side, eth0 is the server side. Problem: The problem is that no multicast is getting through the router (unicast traffic works fine). When I run: $ tcpdump -n -i eth0 I see all of the multicast traffic being sent. Unfortunately: $ tcpdump -n -i eth1 shows none of that multicast traffic (whether the client has requested it or not). Interestingly, when I run iptraf and select eth0 it reports little to no activity, which indicates to me that the traffic is getting dropped at a low level. Question: My question at this point is problem identification. Is the router configured correctly and acting as expected but the client just isn't sending the IGMP join requests? Do I need to install additional software packages like Zebra or mrouted to make this work? Am I completely missing something? Any help or suggestions are greatly appreciated! regards, -bob -bob CONFIDENTIALITY NOTICE: The information in this electronic mail transmission contains confidential information intended only for the use of the individual or entity named above. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copy of the transmission is strictly prohibited. ------_=_NextPart_001_01C2C8AB.4EF8B480 Content-Type: text/html; charset="iso-8859-1" <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <TITLE>building a multicast router</TITLE> <META content="MSHTML 6.00.2800.1106" name=GENERATOR></HEAD> <BODY> <DIV><FONT face=Arial color=#0000ff size=2><SPAN class=657095821-30012003>well, once i figured out what to do it was easy.</SPAN></FONT></DIV> <DIV><FONT face=Arial color=#0000ff size=2><SPAN class=657095821-30012003></SPAN></FONT> </DIV> <DIV><FONT face=Arial color=#0000ff size=2><SPAN class=657095821-30012003>1) install freebsd over linux.</SPAN></FONT></DIV> <DIV><FONT face=Arial color=#0000ff size=2><SPAN class=657095821-30012003>2) recompile kernel with: option MROUTING</SPAN></FONT></DIV> <DIV><FONT face=Arial color=#0000ff size=2><SPAN class=657095821-30012003>3) start mrouted</SPAN></FONT></DIV> <DIV><FONT face=Arial color=#0000ff size=2><SPAN class=657095821-30012003>4) go get yourself a cold beer. you deserve it!</SPAN></FONT></DIV> <DIV><FONT face=Arial color=#0000ff size=2><SPAN class=657095821-30012003></SPAN></FONT> </DIV> <DIV><FONT face=Arial color=#0000ff size=2><SPAN class=657095821-30012003>thanks!</SPAN></FONT></DIV> <P><FONT size=2>-bob<BR><BR><BR><BR>CONFIDENTIALITY NOTICE: The information in this electronic mail transmission contains confidential information intended only for the use of the individual or entity named above. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copy of the transmission is strictly prohibited.<BR></FONT></P> <BLOCKQUOTE dir=ltr style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px"> <DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma size=2>-----Original Message-----<BR><B>From:</B> Bob Yeaw [mailto:byeaw@widevine.com]<BR><B>Sent:</B> Wednesday, January 29, 2003 9:42 AM<BR><B>To:</B> 'lartc@mailman.ds9a.nl'<BR><B>Subject:</B> [LARTC] building a multicast router<BR><BR></FONT></DIV> <P><FONT size=2>Hi,</FONT> </P> <P><FONT size=2>I have been reading: <A href="http://lartc.org/howto/lartc.multicast.html"; target=_blank>http://lartc.org/howto/lartc.multicast.html</A> in effort to understand how to route multicast traffic and just joined the group.</FONT></P> <P><FONT size=2>History: I am trying to multicast mpeg (using the videolan server) on a private network. The server side of the network is copper gigabit, which connects to one of those cheap fast Ethernet switches with a single gigabit uplink. The problem I'm having is the ports are getting flooded on the client side switch (i.e., all multicast traffic sent to all ports on the switch).</FONT></P> <P><FONT size=2>After doing some research it sounds like installing a multicast router between the client and server side is the best solution. So that's what I'm trying to do now.</FONT></P> <P><FONT size=2>I have Red hat Linux 7.3 installed. I've gone through the steps described on the how-to (link above):</FONT> </P> <P><FONT size=2>$ demsg | grep IGMP </FONT><BR><FONT size=2>IP Protocols: ICMP, UDP, TCP, IGMP</FONT> <BR><FONT size=2>$ cat /proc/sys/net/ipv4/ip_forward</FONT> <BR><FONT size=2>1</FONT> <BR><FONT size=2>$ netstat -rn</FONT> <BR><FONT size=2>Kernel IP routing table</FONT> <BR><FONT size=2>Destination Gateway Genmask Flags MSS Window irtt Iface</FONT> <BR><FONT size=2>192.168.3.0 0.0.0.0 255.255.255.0 U 40 0 0 eth1</FONT> <BR><FONT size=2>10.100.100.0 0.0.0.0 255.255.255.0 U 40 0 0 eth0</FONT> <BR><FONT size=2>127.0.0.0 0.0.0.0 255.0.0.0 U 40 0 0 lo</FONT> <BR><FONT size=2>224.0.0.0 0.0.0.0 240.0.0.0 U 40 0 0 eth1</FONT> <BR><FONT size=2>0.0.0.0 10.100.100.254 0.0.0.0 UG 40 0 0 eth0</FONT> </P> <P><FONT size=2># NOTE: eth1 is the client side, eth0 is the server side.</FONT> </P> <P><FONT size=2>Problem:</FONT> <BR><FONT size=2>The problem is that no multicast is getting through the router (unicast traffic works fine). When I run:</FONT> </P> <P><FONT size=2>$ tcpdump -n -i eth0</FONT> </P> <P><FONT size=2>I see all of the multicast traffic being sent. Unfortunately:</FONT> </P> <P><FONT size=2>$ tcpdump -n -i eth1</FONT> </P> <P><FONT size=2>shows none of that multicast traffic (whether the client has requested it or not). Interestingly, when I run iptraf and select eth0 it reports little to no activity, which indicates to me that the traffic is getting dropped at a low level.</FONT></P> <P><FONT size=2>Question:</FONT> <BR><FONT size=2>My question at this point is problem identification. Is the router configured correctly and acting as expected but the client just isn't sending the IGMP join requests? Do I need to install additional software packages like Zebra or mrouted to make this work? Am I completely missing something? </FONT></P> <P><FONT size=2>Any help or suggestions are greatly appreciated!</FONT> </P> <P><FONT size=2>regards,</FONT> </P> <P><FONT size=2>-bob</FONT> </P><BR><BR> <P><FONT size=2>-bob</FONT> </P><BR><BR> <P><FONT size=2>CONFIDENTIALITY NOTICE: The information in this electronic mail transmission contains confidential information intended only for the use of the individual or entity named above. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copy of the transmission is strictly prohibited.</FONT></P></BLOCKQUOTE></BODY></HTML> ------_=_NextPart_001_01C2C8AB.4EF8B480--
