Converting To A Vss - Cisco Catalyst 4500 Series Software Configuration Manual

Configuring a VSS
The switch on which we execute the above commands becomes the master switch after VSS boots. Local
Interfaces lists interfaces on the switch where we are executing the commands. Remote Interfaces lists
the interfaces on the peer switch connected with the local interfaces.
Select a maximum of eight VSL local interfaces (i.e., interfaces under the Local Interface column).
This example forces both the master and standby switches to reboot and come up in VSS. Now, we have
two interfaces as VSL members with the local interfaces GigabitEthernet 2/15 and GigabitEthernet 2/17.
SwitchA# switch convert mode easy-virtual-switch
SwitchA(easy-vss)# VSL GigabitEthernet2/15 GigabitEthernet2/17
Note
The master switch shares the tftp image path with the standby switch. On reboot, if the tftp path is used
for loading the image, both switches boot with the same image.

Converting to a VSS

By default, the Catalyst 4500 series switch is configured to operate in standalone mode (the switch
works independently). The VSS combines two standalone switches into one virtual switch, operating in
virtual switch mode.
When you convert two standalone switches into one VSS, all non-VSL configuration settings on the VSS
Note
Standby switch will revert to the default configuration.
Preferably, conversion to VSS should be done on a maintenance window. If you plan to use the same port
Note
channel number for VSL, default the existing port channel configurations that are available on
standalone switches. Then, follow the guidelines in section
page
To convert two standalone switches into a VSS, you perform the following major activities:
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In virtual switch mode, both switches use the same configuration file. When you make configuration
changes on the VSS Active switch, these changes are automatically propagated to the VSS Standby
switch.
The tasks required to convert the standalone switch to a VSS are detailed in the following sections:
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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
5-32
10G and 1G interfaces cannot be mixed. Chosen interfaces should belong to the same peer.
5-34.
Save the standalone configuration files.
Configure each switch for required VSS configurations.
Convert to a VSS.
Backing Up the Standalone Configuration, page 5-33
Configuring SSO and NSF, page 5-34
Assigning Virtual Switch Domain and Switch Numbers, page 5-34
Configuring VSL Port Channel and Ports, page 5-34
Converting the Switch to Virtual Switch Mode, page 5-36
(Optional) Configuring VSS Standby Switch Modules, page 5-39
Chapter 5 Configuring Virtual Switching Systems
Configuring VSL Port Channel and Ports,