Configuring second interface with multicast problem - tried multiple OSs -
Hope someone can help, I've tried this on a Fedora, Centos and now on Ubuntu machine.
I need to configure one interface on 10.0.10 and one on 171.31.4. to receive a multicast stream from the VPN, but when I attempt configuring both with gateways I can't get traffic over both networks. I have attempted both interfaces static, as well as attempting static and dhcp. I have this working on a Mac OS X server, so I know that all the networking for both LANs are fine. In Mac OS X this seems to work just fine having two default gateways. On Ubuntu - latest test - two default gateways and still no traffic over the 171 network. Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 171.31.4.0 * 255.255.255.0 U 0 0 0 eth1 10.0.10.0 * 255.255.255.0 U 0 0 0 eth0 default 171.31.4.1 0.0.0.0 UG 100 0 0 eth1 default 10.0.10.1 0.0.0.0 UG 100 0 0 eth0 Fedora 12: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 172.31.4.0 * 255.255.255.0 U 1 0 0 eth1 10.0.10.0 * 255.255.255.0 U 0 0 0 eth0 link-local * 255.255.0.0 U 1002 0 0 eth0 default 10.0.10.1 0.0.0.0 UG 0 0 0 eth0 When I do route add default gw 172.31.4.1 I can get multicast but I lose the connection to the external network. Any ideas for how to proceed in this would be appreciated!! |
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See note about kernel. http://eglug.org/node/2188 |
Thanks for the tips
First flushed the routing table to get rid of all the previous junk - devils in the details. Solved this by creating ip tables for the two different IP access points, and did install iproute2.
Basically this is what I did, where OTHER is the 2nd internet connection and COMCAST has internal IP, but provides the main connection out: echo 1 COMCAST >> /etc/iproute2/rt_tables echo 2 OTHER >> /etc/iproute2/rt_tables ip route add default via 10.0.10.1 dev eth0 table COMCAST ip rule add from 10.0.10.0/24 table COMCAST ip route add default via x.x.x.1 dev eth1 table OTHER ip rule add from x.x.x.0/24 table OTHER ip rule add to x.x.x.0/24 table OTHER ip rule add to 10.0.10.0/24 table COMCAST ip route add default nexthop via 10.0.10.1 dev eth0 nexthop via x.x.x.1 dev eth1 Again, thanks for pointing me in the right direction! |
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