20.7 Summary Chart

20.7 Summary Chart

Table 20-1 yields handy information concerning network management tasks in a cluster.

Table 20-1: Network Services Summary

Network Services
Service		Configuration	Cluster Aware	CAA	Notes
DHCP	client	x	x	x	Not Allowed. Static Addresses only
	server	common	x	√	Implemented as a single-instance, highly-available CAA application resource (dhcp). Clients should use the default cluster alias.
DNS/BIND	client	common	x	x	/etc/resolv.conf is a cluster-common file.
	server	common	x	√	Implemented as a single-instance, highly-available CAA application resource (named).
NFS	client	common	x	x	By default, the NFS is configured and enabled on all members.
	server	common	√	x	The NFS server implementation is cluster-aware. By default, the NFS is configured and enabled on all members. Clients must use the default cluster alias prior to V5.1A. As of V5.1A, alternate aliases can be defined in /etc/exports.aliases.
			x	√	Server versions of rpc.statd & rpc. lockd are implemented as a single-instance, highly-available CAA application resource(cluster_lockd).
	autofs	common	x	√	Implemented as a single-instance, highly-available CAA application resource (autofs).
NIS	client	common	x	x	By default, the NFS is configured and enabled on all members.
	master server	common	x	√	If configured on one member, it is configured the same on all members. ypxfrd is multi-instance, and is active on all the members. Although rpc . yppasswdd runs on every node, it is single-instance; only one daemon is actually active at a time. Clients should use the default cluster alias.
	slave server	common	x	x	By default, the NFS is configured and enabled on all members.
NTP		member-specific	x	x	Time must be synchronized. Members are configured as peers.
Routing		member-specific	x	x	Must be enabled prior to V5.1A PK1.
	gated	common	x	x	Member-specific routing information added and maintained by CLUA (aliasd).