Building a Two-unit Linear-topology Trunk Manually

The following procedure uses an ICX 8200 stack as an example. The two-unit ICX 8200 stack has one potential linear-topology trunk, (x/2/1 to x/2/4). The following figure shows the appropriate cabling for the four-port linear topology trunk (x/2/1 to x/2/4) on an ICX 8200-24P two-unit stack configured in the following procedure.

ICX 8200-24P Two-unit Stack with Linear-topology Trunk as Configured in Example

Complete the following steps to configure a two-unit linear-topology trunk manually (in this case, on an ICX 8200 two-unit stack).

  1. On both units, create the desired trunk in stack unit configuration sub-mode. 
    ICX8200-24P Router# configure terminal
ICX8200-24P Router(config)# stack unit 1
ICX8200-24P 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 and stack-port ethernet 1/2/3
    The example configures ports 1/2/1 through 1/2/4 as a stacking trunk on one of the stack unit candidates. Enter the trunk configuration on the other unit, too.
  2. Enter the stack enable command on both units. 
    ICX8200-24P Router(config-unit-1)# exit
ICX8200-24P Router(config)# stack enable
Enable stacking. This unit actively participates in stacking
  3. Connect cables between the two units. (For this example, connect four cables.)

    Once connected, both units perform elections to choose the active controller. The unit that loses the election is reloaded as a stack member and later is assigned the standby role.

    When the member boots up, it joins, and a two-unit stack forms.

  4. Enter the write memory command to save the learned configuration. 
    ICX8200-24P Router(config)# write memory

The following example shows the manual formation of a two-unit ICX 8200 linear-topology stack. 

ICX8200-24P Router# configure terminal
ICX8200-24P Router(config)# stack unit 1
ICX8200-24P 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 and stack-port ethernet 1/2/3
ICX8200-24P Router(config-unit-1)# stack enable
Enable stacking. This unit actively participates in stacking
ICX8200-24P Router(config-unit-1)# end
ICX8200-24P Router# show stack
T=14m51.8: alone: standalone, D: dynamic cfg, S: static
ID   Type          Role    Mac Address    Pri State   Comment
1  S ICX8200-24P   active  c0c5.207e.daea   0 local   Ready

    active
     +---+
  2/1| 1 |
     +---+
Role history: N: standalone, A: active, S: standby, M: member
U1: N->A

Current stack management MAC is c0c5.207e.daea
ICX8200-24P Router# show running-config
Current configuration:
!
ver 10.0.00_b324T253
!
stack unit 1
  module 1 icx8200-24p-port-management-module
  module 2 icx8200-4-sfp-plus-port-100g-module
  stack-trunk ethernet 1/2/1 to 1/2/4
stack enable
stack mac c0c5.207e.daea
!
hitless-failover enable
!
... snipped

end

=============================== unit 2 log ==========================
ICX8200-24P Router> enable
No password has been assigned yet...
ICX8200-24P Router# configure terminal
ICX8200-24P Router(config)# stack unit 1
ICX8200-24P 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 and stack-port ethernet 1/2/3
ICX8200-24P Router(config-unit-1)# stack enable
Enable stacking. This unit actively participates in stacking
ICX8200-24P Router(config-unit-1)# show stack
T=13m14.5: alone: standalone, D: dynamic cfg, S: static
ID   Type          Role    Mac Address    Pri State   Comment
1  S ICX8200-24P   alone   c0c5.207c.26ec   0 local   None:0


     +---+
  2/1| 1 |
     +---+
Current stack management MAC is c0c5.207c.26ec
ICX8200-24P Router(config-unit-1)# show running-config
Current configuration:
!
ver 10.0.00_b324T253
!
stack unit 1
  module 1 icx8200-24p-port-management-module
  module 2 icx8200-4-sfp-plus-port-100g-module
  stack-trunk ethernet 1/2/1 to 1/2/4
stack enable
stack mac c0c5.207c.26ec
!
hitless-failover enable
!
... snipped

end

=====================unit 1 log after unit 2 has reloaded and joined ===============
ICX8200-24P Router> enable
No password has been assigned yet...
ICX8200-24P Router# show running-config
Current configuration:
!
ver 10.0.00_b324T253
!
stack unit 1
  module 1 icx8200-24p-port-management-module
  module 2 icx8200-4-sfp-plus-port-100g-module
  stack-trunk ethernet 1/2/1 to 1/2/4
stack unit 2
  module 1 icx8200-24p-port-management-module
  module 2 icx8200-4-sfp-plus-port-100g-module
  stack-trunk ethernet 2/2/1 to 2/2/4
stack enable
stack mac c0c5.207e.daea
!
hitless-failover enable
!
... snipped

end

ICX8200-24P Router# show stack
T=17m51.1: alone: standalone, D: dynamic cfg, S: static
ID   Type          Role    Mac Address    Pri State   Comment
1  S ICX8200-24P   active  c0c5.207e.daea   0 local   Ready
2  D ICX8200-24P   member  c0c5.207c.26ec   0 remote  Ready

    active
     +---+        +---+
     | 1 |2/1==2/1| 2 |
     +---+        +---+
There is no standby. Will assign a standby in 59 sec

Note: standby assignment delayed by large ACL config, delay #=0
Role history: N: standalone, A: active, S: standby, M: member
U1: N->A

Current stack management MAC is c0c5.207e.daea
ICX8200-24P Router# write memory
Parent topic: Configuring Two-unit Stack Linear-topology Trunks