The Journey of a Network Engineer

Feb 16 2013   2:17AM GMT

How to configure VSS?



Posted by: Sulaiman Syed
Tags:
6500
6509
Cisco
cost
datacenter
design
Firewall
FWSM
server farm
VSS

Virtual Switching System (VSS) was one of the early technologies that introduced in the datacenter world to eliminate spanning tree protocol (STP). Thus, giving networks and servers multiple active links with non-blocking ports architecture.

The configurations are quite simple and straight forward. First, VSS domain, assign priority for the primary switch to be the master. Second, create the Virtual Switching Link (VSL). It is basically an etherchannel. Lastly, convert the switch from standalone to virtual switch.

Lets see the configurations.

 Switch 1

switch virtual domain 10
switch mode virtual
switch 1 priority 150
mac-address use-virtual

Switch 2

switch virtual domain 10
switch mode virtual
switch 2 priority 100
mac-address use-virtual

the Portchannel configurations

Swtich 1

!
interface Port-channel11
description >>>>> ISL on SWITCH1 <<<<<
no switchport
no ip address
switch virtual link 1
mls qos trust cos
no mls qos channel-consistency
!

Switch 2

interface Port-channel22
description >>>>> ISL on SWITCH2 <<<<<
no switchport
no ip address
switch virtual link 2
mls qos trust cos
no mls qos channel-consistency

adding interfaces to the port channels

Switch 1

interface TenGigabitEthernet1/5/5
description —->ISL LINK
no switchport
no ip address
mls qos trust cos
channel-group 11 mode on
end
interface TenGigabitEthernet1/5/4
description —->ISL LINK
no switchport
no ip address
mls qos trust cos
channel-group 11 mode on
end

Switch 2

interface TenGigabitEthernet1/5/5
description —->ISL LINK
no switchport
no ip address
mls qos trust cos
channel-group 22 mode on
end
interface TenGigabitEthernet1/5/4
description —->ISL LINK
no switchport
no ip address
mls qos trust cos
channel-group 22 mode on
end

lastly, converting into virtual switch system

switch 1

switch convert mode virtual

Switch 2

switch convert mode virtual

Done. wait for the switches to reload. it takes a while. sometimes upto 10 min for the VSS to be in full operational state. I would write other entries on the operation of VSS, and how SUP failures or chassis failures affect the operation of the VSS.

Lets see the state of our VSS

#show redundancy
Redundant System Information :
——————————
Available system uptime = 3 weeks, 2 days, 15 hours, 58 minutes
Switchovers system experienced = 0
Standby failures = 0
Last switchover reason = none

Hardware Mode = Duplex
Configured Redundancy Mode = sso
Operating Redundancy Mode = sso
Maintenance Mode = Disabled
Communications = Up

Current Processor Information :
——————————-
Active Location = slot 1/5
Current Software state = ACTIVE
Uptime in current state = 3 weeks, 2 days, 15 hours, 57 minutes
Image Version = Cisco IOS Software, s72033_rp Software (s72033_rp-IPSERVICESK9_WAN-M), Version 12.2(33)SXI8a, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2011 by Cisco Systems, Inc.
Compiled Sat 03-Dec-11 07:53 by prod_rel_team
BOOT =
Configuration register = 0×2102

Peer Processor Information :
—————————-
Standby Location = slot 2/6
Current Software state = STANDBY HOT
Uptime in current state = 3 weeks, 2 days, 15 hours, 53 minutes
Image Version = Cisco IOS Software, s72033_rp Software (s72033_rp-IPSERVICESK9_WAN-M), Version 12.2(33)SXI8a, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2011 by Cisco Systems, Inc.
Compiled Sat 03-Dec-11 07:53 by prod_rel_team
BOOT =
Configuration register = 0×2102

This was successful configurations, as our VSS is up, and showing the standby peer as well.

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