Brocade Communications Systems FastIron X Series Diagnostic Manual

Brocade FastIron, FCX, ICX, and TurboIron Diagnostic Reference 15
53-1002965-01
RSTP debug commands
3
If the configuration of VLAN 2 on the Brocade FCX is disabled, the output similar to the following is
displayed.
Brocade# no debug span config vlan 2
STP : Disabling Packets Debugging for VLAN 2
debug span timers
Syntax: [no] debug span timers vlan decimal
This command displays information about the specific STP timer events. The decimal variable
refers to the number of the VLAN.
If the STP timer event on VLAN 2 of the Brocade FastIron device is enabled, the output similar to
the following is displayed.
Brocade# debug span timers vlan 2
STP Enabling Timer Debugging for VLAN 2
Sample output:
STP: Timer Alert - Forward Delay Timer expired On port 1/1/6(5) , VLAN 2
STP: Timer Alert - Forward Delay Timer expired On port 1/1/1(0) , VLAN 2
STP: Timer Alert - Forward Delay Timer expired On port 1/1/6(5) , VLAN 2
STP: Timer Alert - Message Age Timer expired On port 1/1/1(0) , VLAN 2
STP: Timer Alert - Message Age Timer expired On port 1/1/2(1) , VLAN 2
STP: Timer Alert - Forward Delay Timer expired On port 1/1/2(1) , VLAN 2
STP: Timer Alert - Forward Delay Timer expired On port 1/1/2(1) , VLAN 2
If the STP timer event on VLAN 2 of the Brocade FastIron device is disabled, the output similar to
the following is displayed.
Brocade# no debug span timers vlan 2
STP Disabling Timer Debugging for VLAN 2
RSTP debug commands
RSTP provides rapid traffic reconvergence for point-to-point links within a few milliseconds (less
than 500 milliseconds) following the failure of a bridge or bridge port. This reconvergence occurs
more rapidly than that provided by STP because convergence in RSTP bridges is based on the
explicit handshakes between designated ports and their connected root ports rather than on timer
values. The debug 802.1w command displays some information about RSTP.
NOTE
For RSTP debug commands, enter 4094 if STP is enabled. Enter the VLAN ID for Multiple Spanning
Tree Protocol (MSTP). The CLI alerts the user if the VLAN ID does not exist.
debug 802.1w all_802_1w_events
Syntax: [no] debug 802.1w all_802_1w_events vlan decimal
This command debugs all the RSTP transactions, timers, and packets on a specific VLAN. The
decimal variable refers to the number of the VLAN.
If the events are enabled, the output similar to the following is displayed.
Brocade# debug 802.1w all_802_1w_events vlan 2
RSTP Enabling All events Debugging for VLAN 2

Brocade Communications Systems FastIron X Series Specifications

General

Brand	Brocade Communications Systems
Model	FastIron X Series
Category	Switch
Language	English