User manual

C HAPTER 15 | Basic Administration Protocols
Switch Clustering
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ES-2000 Series
SWITCH CLUSTERING
Switch clustering is a method of grouping switches together to enable
centralized management through a single unit. Switches that support
clustering can be grouped together regardless of physical location or switch
type, as long as they are connected to the same local network.
COMMAND USAGE
◆ A switch cluster has a “Commander” unit that is used to manage all
other “Member” switches in the cluster. The management station can
use the web interface to communicate directly with the Commander
through its IP address, and then use the Commander to manage
Member switches using the cluster’s “internal” IP addresses.
◆ Clustered switches must be in the same Ethernet broadcast domain. In
other words, clustering only functions for switches which can pass
information between the Commander and potential Candidates or
active Members through VLAN 4093.
◆ Once a switch has been configured to be a cluster Commander, it
automatically discovers other cluster-enabled switches in the network.
These “Candidate” switches only become cluster Members when
manually selected by the administrator through the management
station.
◆ There can be up to 100 candidates and 36 member switches in one
cluster.
◆ A switch can only be a member of one cluster.
◆ The cluster VLAN 4093 is not configured by default. Before using
clustering, take the following actions to set up this VLAN:
1. Create VLAN 4093 (see "Configuring VLAN Groups" on page 95).
2. Add the participating ports to this VLAN (see "Adding Static
Members to VLANs" on page 96), and set them to hybrid mode,
tagged members, PVID = 1, and acceptable frame type = all.
◆ After the Commander and Members have been configured, any switch
in the cluster can be managed from the web agent by choosing the
desired Member ID from the Show Member page.
CONFIGURING
GENERAL SETTINGS
FOR
CLUSTERS
Use the Administration > Cluster (Configure Global) page to create a
switch cluster.
COMMAND USAGE
First be sure that clustering is enabled on the switch (the default is
disabled), then set the switch as a Cluster Commander. Set a Cluster IP
Pool that does not conflict with the network IP subnet. Cluster IP addresses
are assigned to switches when they become Members and are used for
communication between Member switches and the Commander.