ICX 7850 Configuration Notes

If an ICX 7850 unit has any port configured for breakout into sub-ports, attempts to enable the unit for stacking will fail. Remove the breakout configuration before enabling stacking on the unit. Refer to the RUCKUS FastIron Management Configuration Guide for more information on breakout cable configuration.

When using the manual construction method to add a new unit in a linear stack, make sure that the last unit of the existing stack has both stack-ports or both stack-trunks configured.

Unused stacking ports can be used as data ports. For example, you can elect to use only one valid-stack-port as a stacking port and the other valid-stack-port as a data port. Furthermore, when an ICX 7850 stacking module is not configured for stacking, its stacking ports can be used as data ports.

To configure a stacking trunk manually on a stack unit, use the stack-trunk command. However, in a live production environment, use the multi-stack-trunk command.

Only ports that are in sequential order can be configured as a stacking trunk.

In a stacking system with two directions, ICX 7850 stacks support a maximum of four ports per trunk in one direction. As an exception, a linear-topology trunk in a two-unit stack may contain up to eight ports.

Stacking port speed is either 40-Gbps or 100-Gbps and is auto-detected based on the optics connected. Speed cannot be manually configured.

It is allowable (but not advised) to have a 100-Gbps trunk or port in one direction and a 40-Gbps trunk or port in another direction.

RUCKUS recommends that you keep the same stacking link bandwidth across the stack.

RUCKUS recommends that all ports in the same stacking trunk be the same speed. When ports with different speeds are in the same trunk, a warning message is displayed in the output of the show stack command as shown in the following example.

ICX7850-32Q Router(config)# stack unit 1
ICX7850-32Q Router(config-unit-1)# show stack
ID   Type          Role    Mac Address    Pri State   Comment
1  S ICX7850-32Q   active  903a.7205.06b0   0 local   Ready
2  S ICX7850-48FS  member  903a.7205.3800   0 remote  Ready
3  S ICX7850-48F   standby 903a.7205.4250   0 remote  Ready
    active       standby
    +---+        +---+        +---+
=3/1| 1 |3/5--2/1| 3 |2/5==2/1| 2 |2/5=
|   +---+        +---+        +---+   |
|-------------------------------------|
Warning: inconsistent stacking trunk port speed was found in:
  stack-trunk ethernet 1/3/1 to 1/3/4 has  different speed 100Gbit/40Gbit :
    1/3/1 in speed 100Gbit
    1/3/2 in speed 100Gbit
    1/3/3 in speed 40Gb

Stacking by Device