Configuration Guide User guide

266 FastIron Configuration Guide
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Configuring an ICX 6430 and ICX 6450 IronStack
Periodic background stack diagnosis for ICX 6610 devices
After a stack forms, the system periodically probes the topology to check the connections between
units of this stack. It can detect the following errors. The purposes are to detect user's connection
problem and hardware failures. Error messages are printed about every 10 minutes. If there is no
printout, there is no problem. This diagnosis runs in the background.
Manually triggering stack diagnosis
You can manually trigger the diagnosis using the show stack connection command.
1. Ports of the same trunk connect to different units.
2. Ports of the same trunk connect to different trunks of the same unit.
3. Sub-ports of the 4*10G are down.
4. One end of a 10G port is up and the other end is down.
5. Communication problems between units of the stack
The most common connection error is connecting a 40G port to a 4*10G port. They use the same
type of cable. In such case, the system might show one end is up, and one end is down. The stack
cannot form, and the periodical background diagnosis task won't run at all.
Another connection error is that the two cables of a trunk go to different units, or to different trunks
of the same unit as in case 1 and 2. Stack might still form in these cases. But it may cause internal
forwarding loop, or have forwarding problem.
Cases 3 to 5 are due to hardware failures or software problems.
For example, the active unit console pops up the following messages if sub-ports of 4*10G are
down. The stack should still work because of trunks. If all sub-ports of 4*10G are down, the
diagnosis prints nothing because it cannot distinguish hardware failure or the cable is not
connected.
*** Warning! miss 4*10G link 5/2/8(down)to 1/2/8(down). Stack can still work.
*** Warning! U1, dir=1, 4*10G ports: 1/2/8 are down.
*** Warning! U5, dir=1, 4*10G ports: 5/2/8 are down.
Please use "show stack conn" to view detailed connections
You can suppress the error messages by configuring "stack suppress-warning"
Configuring an ICX 6430 and ICX 6450 IronStack
ICX 6430 and ICX 6450 devices can be stacked using the methods and topologies described in
“Connecting ICX 6450 and ICX 6430 devices in a stack” on page 244. The “Configuring ICX 6430
or ICX 6450 trunked stacking ports”section describes how stacking ports on the ICX 6430 and ICX
6450 devices can be trunked to form a single trunk-to-port connection on two directly connected
stack units. The “Configuring ICX 6430 or ICX 6450 multi-trunked stacking ports”section describes
how to configure a double port trunk configuration on the ICX 6430 and ICX 6450 devices. The
“Error messages encountered during the configuration of an ICX 6430 or ICX 6450 IronStack”
section describes the error messages that may occur when configuring an ICX 6430 or ICX 6450
IronStack.