User guide

Configuring Virtual Chassis Configuring Virtual Chassis
page 13-20 OmniSwitch AOS Release 8 Switch Management Guide May 2014
• The control VLAN must be the same between the chassis comprising the virtual chassis.
For more information on the Control VLAN, see “Configuring the Control VLAN” on page 13-21
Configuring the Chassis Identifier
To configure the Virtual Chassis feature, a unique chassis identifier must first be automatically or manu-
ally assigned to each of the switches that will form the Virtual Chassis group. Assigning the chassis identi-
fier also enables the configuration of the additional virtual chassis parameters for the chassis.
The virtual-chassis configured-chassis-id command is used to configure a unique chassis identifier for a
switch within the virtual chassis group. For example:
-> virtual-chassis chassis-id 1 configured-chassis-id 2
Note: Changing the chassis-id will not cause the Control VLAN or Group ID to change. These parameters
must also be manually changed if required.
Duplicate chassis identifier
In the event two chassis have the same operational chassis identifier value, one of them will be reported as
Inconsistent role (instead of Master or Slave) and Duplicate-Chassis status. This will cause the opera-
tional chassis identifier of one of the chassis to be automatically renumbered to follow the duplicate chas-
sis ID format. (i.e. 101). This numbering is reserved to represent a chassis whose chassis identifier is
duplicate. All management interface commands must use this new operational chassis identifier to affect
any configuration. The duplicate chassis identifier must be corrected by re-configuring the switch locally
through the console or EMP port access. For example:
-> virtual-chassis chassis-id 101 configured-chassis-id 2
Configuring the Virtual Chassis Group Identifier
A virtual chassis group identifier must be assigned to each of the switches that will form the Virtual Chas-
sis group. Each of these switches must use the same group identifier, which identifies the switch as
belonging to that virtual chassis group.
The virtual-chassis chassis-group command is used to configure the same group identifier for each chas-
sis within the virtual chassis group. For example:
-> virtual-chassis chassis-group 1
By default, the virtual chassis group identifier is set to “0”. In a network environment where more than one
virtual chassis group may exist, configure each virtual chassis group with its own unique group identifier.
Duplicate group identifiers are not supported.
Configuring the Hello Interval
Hello packets are used for establishing and maintaining the neighbor relationship between virtual chassis
switches and ensures that communication between switches is bidirectional. Hello packets are sent periodi-
cally out VFL interfaces. Bidirectional communication is indicated when the switch sees itself listed in the
neighbor's hello packet. The hello interval value determines how often these packets are sent.
To configure the hello interval between the multi-chassis peers, use the virtual-chassis hello-interval
command as shown below: