Brocade Network OS Administrator’s Guide v4.1.1 - Manual (Page 153)

Configuring VCS virtual IP addresses
A virtual IP address is assigned for each VCS cluster. This virtual IP address is tied to the principal
switch in the cluster. The management interface of the principal switch can be accessed by means of
this virtual IP address. Because the virtual IP address is a property of the fabric cluster and logical
chassis cluster, in the event that the principal switch goes down, the next principal switch is assigned
this address.
Virtual IP address can be configured by means of the vcs virtual ip address command:
switch(config)# vcs virtual ip address 10.0.0.23
This command can be used in logical chassis cluster and fabric cluster modes only. When the virtual IP
address is configured for the first time, the current principal switch in the cluster is assigned this IP
address.
Virtual IP configuration is global in nature. All the nodes in the cluster are configured with the same
virtual IP address, but address is bound to the current principal switch only. Make sure that the
assigned virtual IP address is not a duplicate of an address assigned to any other management port in
the cluster or network.
Brocade recommends that you use the same subnet as the IP address of management interface. To
display the currently configured virtual IP address, use the show vcs command:
switch# show vcs virtual-ip
Virtual IP : 10.21.87.2/20
Associated rbridge-id : 2
To remove the currently configured virtual IP address, use the no vcs virtual ip address command.
switch(config)# no vcs virtual ip address
switch# show running-config vcs virtual ip address
% No entries found.
NOTE
You should not use the no vcs virtual ip address command when logged onto the switch through the
virtual IP address. Use the management port IP address of the principal switch, or the serial console
connection of the principal switch.
If you wish to rebind this virtual IP address to this management interface, remove the currently
configured virtual IP address and reconfigure it. This situation can arise when the virtual IP address is
not bound to management interface of the principal switch as a result of duplicate address detection.
A separate gateway cannot be configured for virtual IP address. The default gateway is the same as the
gateway address for the management port of the same switch.
Virtual IP address configuration scenarios
Virtual IP address may be assigned to a switch whenever it is the principal switch in the cluster. The
configuration scenarios that may occur are described below.
Virtual IP address configuration scenarios TABLE 25
Scenario Description
First time cluster
formation When the cluster is first being formed, and if the virtual IP address is already configured,
the principal switch is assigned the Virtual IP address. If no Virtual IP configuration exists,
then the principal switch can be access using the management port IP address.
Configuring VCS virtual IP addresses
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