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The conversion process requires configuration of both switches that will form part of the Virtual Switch Domain and requires a reboot on the part of both switches during the

conversion…

ƒ It is recommended to have the interfaces forming the VSL be connected prior to the conversion process as it will minimize the number of times the chassis will be reloaded.

ƒ It is also recommended to begin the conversion process using a default configuration as the conversion process will remove any previous configuration that pre-exists on the

Conversion Process

Conversion to VSS

For the purposes of this explanation - let’s assume the following setup is required…

Switch - 1 Switch - 2

VSL Link Bundle

T5/4

T5/5

T5/4

T5/5

Port-Channel 1 Port-Channel 2

Switch Virtual Domain #10

Conversion Process

Step 1: Configure Virtual Switch ID and Domain

On the two switches, configure the same VS Domain number (in this case it is 10), but unique Switch IDs

Switch - 1 Switch - 2

Router(config)#host VSS

VSS(config)#switch virtual domain 10

Domain ID 10 config will take effect only after the exec command 'switch convert mode virtual' is issued

VSS(config-vs-domain)#switch 1 VSS(config-vs-domain)#exit

Router(config)#host VSS

VSS(config)#switch virtual domain 10

Domain ID 10 config will take effect only after the exec command 'switch convert mode virtual' is issued

VSS(config-vs-domain)#switch 2 VSS(config-vs-domain)#exit

Note: The Domain ID is retained in the configuration, but the Switch ID is not – this is stored as a variable in ROMMON. To see this value:

Conversion Process

Step 2: VSL Configuration – Configure the VSL Port Channel and member ports

Choose unique Port Channel IDs for each chassis to form the VSL and configure them with the corresponding Switch ID

Add the ports on each switch to the port channel that corresponds to the respective side of the VSL

Switch - 1 Switch - 2

VSS(config)#interface port-channel 1

! Associates Switch 1 as owner of port channel 1 VSS(config-if)#switch virtual link 1

VSS(config-if)#interface range tenG 5/4 - 5

! Adds this interface to channel group 1

VSS(config-if-range)#channel-group 1 mode on

VSS(config-if)#interface port-channel 2

! Associates Switch 2 as owner of port channel 2 VSS(config-if)#switch virtual link 2

VSS(config-if)#interface range tenG 5/4 - 5

! Adds this interface to channel group 2

VSS(config-if-range)#channel-group 2 mode on

Conversion Process

Step 3: Convert to Virtual Switch Mode

Convert both switches to Virtual Switch mode using the following exec command:

Switch - 1 Switch - 2

vss#switch convert mode virtual

This command will convert all interface names to naming convention "interface-type switch-number/slot/port", save the running config to startup-config and reload the switch.

Do you want to proceed? [yes/no]: yes Converting interface names

Building configuration...

[OK]

Saving converted configuration to bootflash:

...

Destination filename

[startup-config.converted_vs-20071031-150039]?

vss#switch convert mode virtual

This command will convert all interface names to naming convention "interface-type switch-number/slot/port", save the running config to startup-config and reload the switch.

Do you want to proceed? [yes/no]: yes Converting interface names

Building configuration...

[OK]

Saving converted configuration to bootflash:

...

Destination filename

[startup-config.converted_vs-20071031-150018]?

AT THIS POINT THE SWITCH WILL REBOOT

Conversion Process

When the two switches are brought online, they will proceed with VSL initialization and bring up their respective VSL ports.

The two switches communicate with each other and determine Active and Standby role.

Switch - 1 Switch - 2

SWITCH CONSOLE OUTPUT

<…snip…>

System detected Virtual Switch configuration...

Interface TenGigabitEthernet 1/5/4 is member of PortChannel 1

Interface TenGigabitEthernet 1/5/5 is member of PortChannel 1

<…snip…>

00:00:26: %PFREDUN-6-ACTIVE: Initializing as ACTIVE processor for this switch

Initializing as Virtual Switch ACTIVE processor

<…snip…>

00:01:19: %VSLP-5-RRP_ROLE_RESOLVED: Role resolved as ACTIVE by VSLP

00:01:19: %VSL-5-VSL_CNTRL_LINK: New VSL

SWITCH CONSOLE OUTPUT

<…snip…>

System detected Virtual Switch configuration...

Interface TenGigabitEthernet 2/5/4 is member of PortChannel 2

Interface TenGigabitEthernet 2/5/5 is member of PortChannel 2

<…snip…>

00:00:26: %PFREDUN-6-ACTIVE: Initializing as ACTIVE processor for this switch

Initializing as Virtual Switch STANDBY processor

<…snip…>

00:01:02: %VSLP-5-RRP_ROLE_RESOLVED: Role resolved as STANDBY by VSLP

Conversion Process

Step 4: Finalize Virtual Switch Configuration

This command will get the VSL related commands from the Standby Switch and update the startup-configuration with the new merged configurations

Note that only VSL-related configurations are merged with this step – all other configuration will be lost and requires manual intervention.

This step is only applicable for a first-time conversion.

Switch - 1

SWITCH CONSOLE OUTPUT

<…snip…>

vss-demo#switch accept mode virtual

This command will populate the above VSL configuration from the standby switch into the running configuration.

The startup configuration will also be updated with the new merged configuration if merging is successful.

Do you want to proceed? [yes/no]: yes Merging the standby VSL configuration...

Building configuration...

00:11:33: %PFINIT-SW1_SP-5-CONFIG_SYNC: Sync'ing the startup configuration to the standby Router. [OK]

Conversion Process

Conversion to VSS

Configuration for the conversion takes the following path…

Switch - 1 Switch - 2

vss#sh switch virtual

Switch mode : Virtual Switch Virtual switch domain number : 10

Local switch number : 1

Local switch operational role: Virtual Switch Active Peer switch number : 2

Peer switch operational role : Virtual Switch Standby vss-demo#

vss-sdby>en

Standby console disabled vss-sdby>

Both switches are now converted with Switch 1 as the Master (Active) and Switch 2 as the Standby

Switch 2 console is now disabled for normal console activity…

Conversion Process