We have received requests from customers to form a cluster with nodes which have only one link. This article discusses on how to setup a cluster with one link.
When LLT is configured with one link, GAB reports jeopardy membership. By default GAB requires a node to be connected by atleast two links for a full membership. There is an option in GAB which will supress the jeopardy membership when nodes are configured with only one link.
The -s option means SINGLE NETWORK. This configures GAB to run with one link so that it does not report jeopardy memberships. This option has to be added in /etc/gabtab on all nodes where LLT is configured with one link. This option is applicable to all supported platforms SOLARIS, AIX, HP-UX and Linux
The -s option can be configured on a running cluster. It does not change the current membership. It will take effect from the next membership calculation. Say if the customer is...