Manually Creating a Two-unit ICX 7850 Stack with a Ring Topology

Perform the following steps to manually create a two-unit ICX 7850 stack with a ring topology.
  1. (Optional) Enter the show running-config command on each stack unit to check its current configuration.
    The following example shows two stacking units each with stacking ports configured. 
    Unit 1:
ICX7850-32Q Router# show running-config
Current configuration:
!
ver 09.0.00
!
stack unit 1
  module 1 icx7850-32q-port-management-module
  module 2 icx7800-100g-12port-1200g-module
  module 3 icx7800-100g-8port-800g-module
  stack-port ethernet 1/3/1
  stack-port ethernet 1/3/5
!
!

Unit 2:
ICX7850-48FS Router# show running-config
Current configuration:
!
ver 09.0.00
!
stack unit 1
  module 1 icx7850-48fs-port-management-module
  module 2 icx7800-100g-8port-800g-module
  stack-port ethernet 1/2/1
  stack-port ethernet 1/2/5
!
!
  2. Manually configure the desired stack-ports or stack-trunks on the two candidate stack units. To configure a ring, configure two potential connections on each unit.
    The following example creates two four-port stacking trunks on each stacking candidate. 
    Unit 1:
ICX7850-32Q Router# configure terminal
ICX7850-32Q Router(config)# stack unit 1
ICX7850-32Q Router(config-unit-1)# stack-trunk ethernet 1/3/1 to 1/3/4
stack-trunk ethernet 1/3/1 to 1/3/4 replaces stack-port ethernet 1/3/1
ICX7850-32Q Router(config-unit-1)# stack unit 1
ICX7850-32Q Router(config-unit-1)# stack-trunk ethernet 1/3/5 to 1/3/8
stack-trunk ethernet 1/3/5 to 1/3/8 replaces stack-port ethernet 1/3/5

Unit 2:
ICX7850-48FS Router# configure terminal
ICX7850-48FS Router(config)# stack unit 1
ICX7850-48FS Router(config-unit-1)# stack-trunk ethernet 1/2/1 to 1/2/4
stack-trunk ethernet 1/2/1 to 1/2/4 replaces stack-port ethernet 1/2/1
ICX7850-48FS Router(config-unit-1)# stack-trunk ethernet 1/2/5 to 1/2/8
stack-trunk ethernet 1/2/5 to 1/2/8 replaces stack-port ethernet 1/2/5
ICX7850-48FS Router(config-unit-1)# end
  3. Enter the stack enable command on both the units to enable stacking. 
    Unit 1:
ICX7850-32Q Router# configure terminal
ICX7850-32Q Router(config)# stack enable
Enable stacking. This unit actively participates in stacking

Unit 2:
ICX7850-48FS Router# configure terminal
ICX7850-48FS Router(config)# stack enable
Enable stacking. This unit actively participates in stacking
    Stack active controller election occurs on the connected units, and the second unit reloads to join to the stacking system.
    The active controller is assigned unit ID 1. It reloads and synchronizes configuration with unit 2. Unit 2 is assigned the role of standby controller.
  4. Enter the write memory command to save the configuration after the stack is formed. 
    ICX7850-32Q Router# write memory

There is no startup config file, unable to save legacy config 
Flash Memory Write (8192 bytes per dot) 
Write startup-config done.

Automatic copy to member units:  2
Flash Memory Write (8192 bytes per dot) 
.
Copy Done.
  5. (Optional) Enter the show stack command and the show running-config command to verify stack formation. 
    ICX7850-32Q Router# show stack
T=31m6.8: alone: standalone, D: dynamic cfg, S: static
ID   Type          Role    Mac Address    Pri State   Comment                   
1  S ICX7850-32Q   active  d4c1.9e18.3731   0 local   Ready
2  S ICX7850-48FS  standby d4c1.9e18.8dd9   0 remote  Ready

    active       standby                                                       
     +---+        +---+                                                        
 =3/5| 1 |3/1==2/1| 2 |2/5=                                                    
 |   +---+        +---+   |                                                    
 |                        |                                                    
 |------------------------|                                                    
Standby u2 - protocols ready, can failover or manually switch over
Role history: N: standalone, A: active, S: standby, M: member
U1: N->A

Current stack management MAC is d4c1.9e18.3731

ICX7850-32Q Router# show running-config
Current configuration:
!
ver 09.0.00
!
stack unit 1
  module 1 icx7850-32q-port-management-module
  module 2 icx7800-100g-12port-1200g-module
  module 3 icx7800-100g-8port-800g-module
  stack-trunk ethernet 1/3/1 to 1/3/4
  stack-trunk ethernet 1/3/5 to 1/3/8
stack unit 2
  module 1 icx7850-48fs-port-management-module
  module 2 icx7800-100g-8port-800g-module
  stack-trunk ethernet 2/2/1 to 2/2/4
  stack-trunk ethernet 2/2/5 to 2/2/8
stack enable
stack mac d4c1.9e18.3731
!
!
Parent topic: ICX 7850 Stack Configuration Overview