Figure: A typical configuration of direct-attached links that use LLT over UDP depicts a typical configuration of direct-attached links employing LLT over UDP.

The configuration that the /etc/llttab file for Node 0 represents has directly attached crossover links. It might also have the links that are connected through a hub or switch. These links do not cross routers.

LLT uses IPv6 multicast requests for peer node address discovery. So the addresses of peer nodes do not need to be specified in the /etc/llttab file using the set-addr command. Use the ifconfig -a command to verify that the IPv6 address is set correctly.

set-node Node0
set-cluster 1
#configure Links
#link tag-name device node-range link-type udp port MTU \
IP-address mcast-address
link link1 /dev/udp6 - udp6 50000 - fe80::21a:64ff:fe92:1b46 - 
link link1 /dev/udp6 - udp6 50001 - fe80::21a:64ff:fe92:1b47 -

The file for Node 1 resembles:

set-node Node1
set-cluster 1
#configure Links
#link tag-name device node-range link-type udp port MTU \
IP-address mcast-address
link link1 /dev/udp6 - udp6 50000 - fe80::21a:64ff:fe92:1a92 - 
link link1 /dev/udp6 - udp6 50001 - fe80::21a:64ff:fe92:1a93 -