Stacking Vlans; Configuring Each Switch In A Stack - Lenovo Flex System Fabric CN4093 Application Manual

Stacking VLANs

Configuring Each Switch in a Stack

1. On each switch, enable stacking:
2. On each switch, set the stacking membership mode.
3. On each switch, configure the stacking VLAN (or use the default setting).
4. On each switch, designate the stacking links.
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 Before configuring the stack:
Identify the VLAN to be used as the stacking VLAN.

Save the current configuration to an external device. The port numbering will

change once stacking is enabled. Use the saved configuration to reassign
ports/interfaces as per the new port numbering scheme. Once a stack is
configured, port numbers are displayed throughout the BBI using the csnum
to identify the switch, followed by the switch port number. For example:
VLAN 4090 is the default VLAN reserved for internal traffic on stacking ports.You
can change the VLAN, if required.
Note: Do not use VLAN 4090 (or the configured VLAN) for any purpose other
than internal stacking traffic.
To configure each switch for stacking, connect to the internal management IP
interface for each switch (assigned by the management system) and use the ISCLI
to perform the following steps.
Note: IPv6 is not supported in stacking mode. IP interfaces must use IPv4
addressing for proper stack configuration.
CN 4093(config)# boot stack enable
By default, each switch is set to Member mode. However, one switch must be set to
Master mode. Use the following command on only the designated Master switch:
CN 4093(config)# boot stack mode master
Note: If any Member switches are incorrectly set to Master mode, use the mode
member option to set them back to Member mode.
Although any VLAN (except VLAN 1) may be defined for stack traffic, it is highly
recommended that the default, VLAN 4090 as shown in the following example, be
reserved for stacking.
CN 4093(config)# boot stack vlan 4090
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Chapter 13: Stacking