Veritas Storage Foundation 5.1 SP1 Cluster File System Installation Guide (5900-1510, April 2011)

If the LLT private links are not on different physical networks, then make sure
that the links are on separate subnets. Set the broadcast address in /etc/llttab
explicitly depending on the subnet for each link.
See “Broadcast address in the /etc/llttab file” on page 490.
■ Make sure that each NIC has an IP address that is configured before configuring
LLT.
■ Make sure the IP addresses in the /etc/llttab files are consistent with the
IP addresses of the network interfaces.
■ Make sure that each link has a unique not well-known UDP port.
See “Selecting UDP ports” on page 492.
■ Set the broadcast address correctly for direct-attached (non-routed) links.
See “Sample configuration: direct-attached links” on page 494.
■ For the links that cross an IP router, disable broadcast features and specify
the IP address of each link manually in the /etc/llttab file.
See “Sample configuration: links crossing IP routers” on page 496.
Broadcast address in the /etc/llttab file
The broadcast address is set explicitly for each link in the following example.
■ Display the content of the /etc/llttab file on the first node galaxy:
galaxy # cat /etc/llttab
set-node galaxy
set-cluster 1
link link1 /dev/udp - udp 50000 - 192.168.9.1 192.168.9.255
link link2 /dev/udp - udp 50001 - 192.168.10.1 192.168.10.255
Verify the subnet mask using the ifconfig command to ensure that the two
links are on separate subnets.
galaxy # ifconfig lan1
lan1: flags=1843<UP,BROADCAST,RUNNING,MULTICAST,CKO>
inet 192.168.9.1 netmask ffffff00 broadcast 192.168.9.255
galaxy # ifconfig lan2
lan2: flags=1843<UP,BROADCAST,RUNNING,MULTICAST,CKO>
inet 192.168.10.1 netmask ffffff00 broadcast 192.168.10.255
■ Display the content of the /etc/llttab file on the second node nebula:
nebula # cat /etc/llttab
set-node nebula
Configuring LLT over UDP using IPv4
Manually configuring LLT over UDP using IPv4
490