Specifications

Distribution Layer April 2014
59
The switches are not in VSS mode yet. Verify port-channel configuration on standalone switch #1.
VSS-Sw1# show etherchannel 63 sum
The command output includes output similar to the output below.
…
Group Port-channel Protocol Ports
------+-------------+-----------+---------------------
63 Po63(SD) — Te1/30(w) Te1/31(w)
Verify port-channel configuration on standalone switch #1.
VSS-Sw2# show etherchannel 64 sum
The command output includes output similar to the output below.
…
Group Port-channel Protocol Ports
------+-------------+-----------+---------------------
64 Po64(SD) — Te1/30(w) Te1/31(w)
The VSL port-channel ports will transition from waiting to be aggregated (w) mode to bundled in port-channel (P)
mode only after the VSS conversion is complete in the next step.
Step 3: Enable virtual switch mode operation.
Now that a port-channel has been established between the switches, convert each switch to virtual switch
mode operation. At the enable prompt (that is, not in configuration mode) on each switch, enter the following
commands for each switch.
On standalone switch #1:
VSS-Sw1# switch convert mode virtual
On standalone switch #2:
VSS-Sw2# switch convert mode virtual
When asked if you want to proceed, answer yes.
Each switch now renumbers its interfaces from interface y/z (where y is the slot number and z is the interface
number) to interface x/y/z (where x is the switch number, y is the module number in that switch, and z is the
interface on that module). This numbering scheme allows the two chassis to be addressed and configured as a
single system from a single supervisor, which is the supervisor with the active control plane.
Once the configuration changes, it prompts you to save the configuration to bootflash. Press Return <CR> or
Enter to accept the destination filename and location on each switch.
Both switches reload. The switch pair negotiates using VSLP over the VSL and becomes a VSS, with one of the
switches resolved as the ACTIVE supervisor for the merged VSS switch. All configuration commands must now
be entered on the single active switch console. The other physical chassis in the VSS pair contains the STANDBY
HOT supervisor with a console port that displays the Standby prompt.
On the active switch console, use the following command to verify that both switches can see each other, that
they are in SSO mode, and that the second supervisor is in STANDBY HOT status.
VSS-Sw1#show switch virtual redundancy
Confirm that the two Cisco Catalyst 4500 switches are now operating as a single VSS system by using
configuration mode to rename the switch hostname.
VSS-Sw1(config)#hostname D4500-VSS
D4500-VSS(config)#