linux help needed
Mark Ayzenshteyn
I need help setting up an mbone client on my linux box thats attached
to an @home cable modem. The routers do not seem to do multicast.
This is what I got so far. I recompiled the kernel(2.0.33) & enabled
multicast, multicast routing and ip tunneling.
here is the dmesg
...
IP Protocols: IGMP, ICMP, UDP, TCP, IPIP
Linux IP multicast router 0.07.
...
I got mrouted 3.81 the binary distribution and I copied the distributed
conf file to /etc/mrouted.conf
Here is the config file
# $Id: mrouted.conf,v 3.8 1995/11/29 22:40:47 fenner Rel $
#
# This is the configuration file for "mrouted", an IP multicast router.
# mrouted looks for it in "/etc/mrouted.conf".
#
# Command formats:
#
# name <boundname> <scoped-addr>/<mask-len>
# cache_lifetime 3600 # seconds
# pruning on
#
# phyint <local-addr> [disable] [metric <m>] [threshold <t>] [rate_limit <b>]
# [boundary (<boundname>|<scoped-addr>/<mask-len>)]
# [altnet (<subnet>/<mask-len>|<subnet>)]
# tunnel <local-addr> <remote-addr> [srcrt] [metric <m>]
# [threshold <t>] [rate_limit <b>]
# [boundary (<boundname>|<scoped-addr>/<mask-len>)]
#
# NOTE: any phyint commands MUST precede any tunnel commands
# NOTE: the mask-len is the no. of leading 1's in the mask
# NOTE: rate_limit is in kilobits, and defaults to 500 for tunnels
#
# Example of named bounary:
#name LOCAL 239.255.0.0/16
#name EE 239.254.0.0/16 # i.e. the EE dept wants local groups
#
# Example of use of named boundary
#phyint eth0 disable
phyint eth1 # le1 is our interface to comp sci,
# # keep them away from our local groups
#
#
# Template tunnel for mcast_install
tunnel 24.4.65.80 192.65.185.100 metric 1 threshold 16 rate_limit 500
#tunnel 24.4.65.80 128.4.0.8 metric 1 threshold 64 rate_limit 500 # <-- REPLACE # boundary LOCAL
#
# You might want to specify a boundary on your tunnel to the outside world,
# as above.
#
# NOTE: ONLY uncomment the following if you are running mrouted.snmp!
#sysName "mymrouter"
#sysContact "Me <m...@me.com> +x.yyy.zzz-zzzz"
#sysVersion "MyOS 4.1.3 and mrouted"
#sysLocation "The MBONE"
Eth0 is a local interface and eth1 is connected to the cable modem.
Here is the output of mrinfo
127.0.0.1 (localhost) [version 3.8,prune,genid,mtrace]:
192.168.2.1 -> 0.0.0.0 (local) [1/1/querier/leaf]
24.4.65.80 -> 0.0.0.0 (local) [1/1/querier/leaf]
24.4.65.80 -> 192.65.185.100 (mbone-cern.switch.ch) [1/16/tunnel/down/leaf]
I added a route for the multi cast IPs and here is my new routing table
Destination Gateway Genmask Flags MSS Window Use Iface
localnet * 255.255.255.0 U 1500 0 0 eth0
@home * 255.255.255.0 U 1500 32768 14 eth1
loopback * 255.0.0.0 U 3584 0 1 lo
224.0.0.0 * 240.0.0.0 U 1500 0 15 eth1
default cr1-hfc1.elcjn1 * UG 1500 32768 41 eth1
map-mbone does not seem to find anything and sdr never finds any sessions.
I ran tcpdump and I seems that alot of packets get sent out to the other
end of the tunnel, but nothing ever comes back. Like tunneling wasn't
working. But every thing is set up and I can't find anything that seems
wrong.
here is some tcpdump outuput
03:14:24.373913 bonzo.org > mbone-cern.switch.ch: igmp dvmrp 1.14.8.3
[b1=0x1]
03:14:25.023913 bonzo.org > 224.2.127.253: igmp-6 [ttl 1]
03:14:30.523913 bonzo.org > 224.1.127.255: igmp-6 [ttl 1]
03:14:31.233913 bonzo.org > SAP.MCAST.NET: igmp-6 [ttl 1]
...
03:15:44.373913 bonzo.org > DVMRP.MCAST.NET: igmp dvmrp 1.14.8.3 [b1=0x1]
03:15:44.373913 bonzo.org > mbone-cern.switch.ch: igmp dvmrp 1.14.8.3 [b1=0x1]
I really don't know what I am doing wrong. I need some help to get the
tunnel working.
Thanks alot,
Mark
--
==========================================================================
Mark Ayzenshteyn CE Major at UCSD
ma...@bonzo.org
http://www.bonzo.org/~marka
Mark Ayzenshteyn
Rafal Maszkowski
>I need help setting up an mbone client on my linux box thats attached
>to an @home cable modem. The routers do not seem to do multicast.
>This is what I got so far. I recompiled the kernel(2.0.33) & enabled
>multicast, multicast routing and ip tunneling.
2.0 should work but recently I was trying multicasting only on 2.1 kernels. My
mrouted was working, hopefully properly, and is available as:
ftp://sunsite.icm.edu.pl/private/rzm/mbone/mrouted-3.9-beta3-i386-linux21.tar.gz
R.