Wired Intelligent Edge (Campus Switching and Routing)

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ArubaOS-CX Switches: VSX and MC-LAG

This is a quick note on how to configure VSX and MC-LAG in two tier topology.

 

Topology Diagram:Topology Diagram3.jpg

For initial setup of ArubaOS-CX Switch, please refer the below page.

https://community.arubanetworks.com/t5/Wired-Intelligent-Edge-Campus/ArubaOS-CX-Switches-Configuring-for-initial-access-and/td-p/526080

 

How to configure VSX and MC-LAG ?

Aruba Virtual Switching Extension (VSX) is virtualization technology for aggregation/core switches running the ArubaOS-CX operating system.
VSX virtualizes the control plane of two aggregation switches to function as one device at layer 2 and as independent devices at layer 3. From a datapath perspective, each device does an independent forwarding lookup to decide how to handle traffic.

 

Creating the VSX LAG:
Create the required VLANs
vlan 200
vlan 250

 

Create the ISL interface
interface lag 256
description ISL link for VSX
no shutdown
no routing
vlan trunk native 250
vlan trunk allowed 200,250
lacp mode active

 

Add a physical interface into the LAG
interface 1/1/52
description vsx-link
no shutdown
lag 256
interface 1/1/53
description vsx-link
no shutdown
lag 256

 

Enable the interface for keepalive communication
interface 1/1/1
description heartbeat-link
no shutdown
ip address 192.168.255.1/24
ipv6 address link-local


Goto the VSX context, set the role of switch(Primary/Secondary), Enable ISL and Enable Keepalive.
vsx
inter-switch-link lag 256
role primary
keepalive peer 192.168.255.2 source 192.168.255.1
vsx-sync copp-policy dns snmp static-routes time


Configure the Multi-Chassis LAG:
interface lag 1 multi-chassis
vsx-sync vlans
description MC-LAG
no shutdown
no routing
vlan trunk native 250
vlan trunk allowed all
lacp mode active


Add physical interfaces into the multichassis interface
interface 1/1/31
no shutdown
lag 1

 

Create an active gateway SVI
interface vlan250
vsx-sync active-gateways
ip address 10.10.250.11/24
active-gateway ip 10.10.250.1 mac 00:00:00:00:83:20
interface vlan200
vsx-sync active-gateways
ip address 10.200.1.11/24
active-gateway ip 10.200.1.1 mac 00:00:00:00:83:21

 

Repeat the previous steps for the secondary switch.Secondary Switch.jpg

 

Configuration on the Access Switch (ArubaOS-Switch)

trunk 1/A1-1/A2 trk1 lacp
vlan 200
name "VLAN200"
tagged Trk1
ip address 10.200.1.13 255.255.255.0
exit
vlan 250
name "VLAN250"
untagged Trk1
ip address 10.10.250.13 255.255.255.0
exit

 

Verification:

show vsx briefvsx brief.jpg

 

show lacp interfaceslacp interfaces.jpg

 

show vsx statusvsx status.jpg

 

show lacp (From Access Switch)lacp from access switch.jpg

 

Statistics Commands:

show vsx statistics interface lag256
show vsx statistics interface lag1

 

Hope you find this post useful.  Please post your feedback !

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