Brocade FastIron SX, FCX, and ICX Diagnostic Reference - Manual (Page 18)

6 Brocade FastIron SX, FCX, and ICX Diagnostic Reference
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Layer 1 debug commands
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Brocade(config-if-e1000-1/1/25)# loop-detection
When there is loop detection activity in the switch, the debug information regarding loop detection
is displayed on the console. The following example shows the output for the debug loop-detect
command when the port goes into a disabled state because of loop detection (strict mode).
insert_disable primary 1/1/25, vlan=4096
Loop-detection: port 1/1/25 (vlan=1), put into errdisable state
Execute the following command to configure loop detection in a VLAN in loose mode.
Configure loop-detection loose mode on port vlan 2 :
Brocade(config-vlan-2)# loop-detection
Brocade(config-vlan-2)# insert_disable primary 1/1/31, vlan=2
The following output is displayed after the configuration.
Loop-detection: port 1/1/31 (vlan=2), put into errdisable state
insert_disable primary 1/1/32, vlan=2
Loop-detection: port 1/1/32 (vlan=2), put into errdisable state
debug loop-detect level
Syntax: [no] debug loop-detect level
This command debugs loop detection in a particular level.
Brocade# debug loop-detect level 1
STRICT MODE:
Topology: port 1/1/25 is single port.
Brocade# debug loop-detect level 3
Configure loop-detection on port 1/1/25 :
Brocade(config-if-e1000-1/1/25)# loop-detection
Brocade(config-if-e1000-1/1/25)# Loop-detection: port 1/1/25 (vlan=1), put into
errdisable state
LOOSE MODE:
Topology: port 1/1/31 is connected to 1/1/32 in same vlan.
Configure loop-detection on port vlan 2 :
Brocade(config-vlan-2)# loop-detection
Brocade(config-vlan-2)# Loop-detection: port 1/1/31 (vlan=2), put into errdisable
state
Loop-detection: port 1/1/32 (vlan=2), put into errdisable state
Port debug commands
The following commands deal with the debugging of port activity.
debug port hw-state
Syntax: [no] debug port hw-state
This command monitors the hardware status of a port. This helps to enable or disable port
debugging in the hardware state.
Brocade# debug port hw-state
Topology: Port 1/1/31 is connected to port 1/1/32.