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multicast_route [2017/10/18 16:00] walkeradminmulticast_route [2023/03/09 22:35] (current) – external edit 127.0.0.1
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 ====== Multicast Route ====== ====== Multicast Route ======
-<color #db5f0b>Oct 2017)</color>+<color #db5f0b>Oct 2017</color>
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     1. Create a routing file in (CentOS) /etc/sysconfig/network-scripts/     1. Create a routing file in (CentOS) /etc/sysconfig/network-scripts/
     2. Add the route from the command line.     2. Add the route from the command line.
 +\\ 
 +\\ 
 +
 +----
 +
 +===== 1. Create a routing file =====
 +\\ 
 +In this example, we will define that all multicast traffic in the range 239.X.Y.Z will be listened on the eth2 interface. 
 +\\ 
 +\\ 
 +To do this, navigate to the location where all the interface configuration files are held. On CentOS this is /etc/sysconfig/network-scripts
 +\\ 
 +    cd /etc/sysconfig/network-scripts
 +\\ 
 +Create a <color #ed1c24>route config file</color> for your interface (eth2 in this example).
 +\\ 
 +    vi /etc/sysconfig/network-scripts/route-eth2
 +\\ 
 +Note, the filename is the word "route" + "-" + "interface name". So if your interface name was eno33559296, then your route file would be called route-eno33559296.
 +\\ 
 +\\ 
 +Now add your routing parameters.
 +\\ 
 +<file>
 +GATEWAY0=11.0.100.1
 +NETMASK0=255.0.0.0
 +ADDRESS0=239.0.0.0
 +</file>
 +\\ 
 +The above routing information routes all traffic that has a multicast address of 239.x.x.x and a subnet of 255.0.0.0 to interface eth2 (as dictated by the name of the file "route-eth2".
 +\\ 
 +\\ 
 +This will route all multicast traffic requests on 239.X.Y.Z scope to interface Eth2, which has the IP address 11.0.100.1. The 'Gateway' in this instance is an interface address. 
 +\\ 
 +\\ 
 +Save and close the file. Restart networking or restart the server.
 +\\ 
 +\\ 
 +
 +----
 +-
 +===== 2. Add the route from the command line =====
 +\\ 
 +We can add the route from the command line, this does not create a file for us in the /etc/sysconfig/network-scripts folder, I don't actually know where it gets stored (or if it is persistent). so you need to test this method.
 +\\ 
 +\\ 
 +In this example we are going to add a multicast route 224.0.0.0/4 (/4 = 240.0.0.0) to an interface called eno33559296. 224.0.0.0/4 basically means everything from 239.0.0.0 to 224.255.255.255, so all multicast addresses.
 +\\ 
 +\\ 
 +From the command line, enter the following:
 +\\ 
 +    ip route add 224.0.0.0/4 dev eno33559296
 +\\ 
 +You can check to see if the route has taken by using the following:
 +\\ 
 +    ip route
 +\\ 
 +you will see a table of routes, with the new route added.
 +\\ 
 +<file>
 +Destination     Gateway         Genmask         Flags Metric Ref    Use IfaceD
 +default         10.43.0.3       0.0.0.0         UG    100    0        0 eno16780032
 +10.0.0.0        10.0.3.70       255.0.0.0       UG    0      0        0 eno33559296
 +10.0.3.0        0.0.0.0         255.255.255.0       100    0        0 eno33559296
 +10.43.0.0       0.0.0.0         255.255.224.0       100    0        0 eno16780032
 +224.0.0.0       0.0.0.0         240.0.0.0                0        0 eno33559296
 +</file>
 +\\ 
 +The last line <color #ed1c24>224.0.0.0 - 0.0.0.0 - 240.0.0.0 - U - 0 - 0 - 0 - eno33559296</color> is our new route.
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multicast_route.1508338824.txt.gz · Last modified: 2023/03/09 22:35 (external edit)