Designing Disaster Tolerant High Availability Clusters, 10th Edition, March 2003 (B7660-90013)

Building a Continental Cluster
Building the ContinentalClusters Configuration
Chapter 5 213
classless interdomain routing, a type
of routing supported by the Border
Gateway protocol (BGP).
allow from lists all the nodes that are allowed access. Permissible
entries are:
all All hosts are allowed access.
domain Hosts whose names match, or end in,
this string are allowed access, e.g.
hp.com.
hostname The named host (for example,
kitcat.myco.com) is allowed access.
IP address Either a full IP address, or a partial
IP address of 1 to 3 bytes for subnet
inclusion is allowed.
network/netmask This pair of addresses allows more
precise inclusion of hosts, (e.g.
10.163.121.23/225.225.0.0).
network/nnnCIDR This specification is like the
network/netmask specification,
except the netmask consists of nnn
high-order 1 bits. “CIDR” stands for
classless interdomain routing, a type
of routing supported by the Border
Gateway protocol (BGP).
The most typical entry is hostname. The following entries are from a
typical /etc/opt/cmom/cmomhosts file:
order allow,deny
allow from lanode1.myco.com
allow from lanode2.myco.com
allow from nynode1.myco.com
allow from nynode2.myco.com
allow from 10.177.242.12
If the file is installed on all nodes in the continental cluster, these entries
will allow the monitors running on lanode1, lanode2, nynode1, and
nynode2 to obtain information about the health of all nodes in the
configuration.