Cisco Catalyst 4500 Series - Page 248

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Software Configuration Guide—Release IOS XE 3.6.0E and IOS 15.2(2)SG
OL-30933-01
Chapter 5 Configuring Virtual Switching Systems
Configuring a VSS
Perform the following task on the VSS active switch that you want to make the master switch, which
manages the standby switch after VSS boot-up:
The following example illustrates use of the vsl ? command:
SwitchA# switch convert mode easy-virtual-switch
# (easy-vss)# VLS ?
Local Interface Remote Interface Hostname Standby-IP
GigabitEthernet2/15 GigabitEthernet3/15 Switch-B 5.5.5.5
GigabitEthernet2/17 GigabitEthernet3/17 Switch-B 5.5.5.5
GigabitEthernet2/4 GigabitEthernet3/4 Switch-C 4.4.4.4
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 10G and 1G interfaces cannot be mixed. Chosen interfaces should belong to the same peer.
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 4500/4500X 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.
Note When you convert two standalone switches into one VSS, all non-VSL configuration settings on the VSS
Standby switch will revert to the default configuration.
Command Purpose
Step 1
Switch# switch convert mode easy-virtual-switch
Switches to easy VSS sub-mode
Step 2
Switch(easy-vss)# VSL ?
and
Switch(easy-vss)# VSL local-interface
Displays a list of local inter-faces (with their peer
interfaces, switch-ip and switch-name).
Assigns the local interfaces that we want to convert to
VSL. Choose interfaces under the column Local
Interfaces under 'VSL?'
Step 3
Switch(easy-vss)# exit
Return to exec command mode.