Dell Force10 MXL Blade - Page 588

586 | Spanning Tree Protocol (STP)
www.dell.com | support.dell.com
Note: Note that unless you enable the shutdown-on-violation option, STP only drops packets after a BPDU
violation; the physical interface remains up, as shown below:
FTOS#show spanning-tree 0 brief
Executing IEEE compatible Spanning Tree Protocol
Root ID Priority 32768, Address 0001.e88a.fdb3 Cost 1
Root Port 2 (Port-channel 1)
Root Bridge hello time 2, max age 20, forward delay 15
Bridge ID Priority 32768, Address 001e.c9f1.00cf
Configured hello time 2, max age 20, forward delay 15
Bpdu filter disabled globally
Interface Designated
Name PortID Prio Cost Sts Cost Bridge ID PortID
---------- ------- ---- ------ ----------- ------ -------------------- ------
Po 1 8.2 8 1 FWD 0 32768 0001.e88a.fdb3 8.2
Te 3/20 8.317 8 4 EDS 1 32768 001e.c9f1.00cf 8.317
Te 4/20 8.373 8 4 FWD 1 32768 001e.c9f1.00cf 8.373
Te 4/21 8.374 8 4 FWD 1 32768 001e.c9f1.00cf 8.374
FTOS#show ip int br ten 3/20
Interface IP-Address OK Method Status Protocol
TenGigabitEthernet 3/20 unassigned YES None up up
FTOS#
FTOS Behavior: Regarding bpduguard shutdown-on-violation behavior:
1 If the interface to be shutdown is a port channel, all the member ports are disabled in the hardware.
2 When a physical port is added to a port channel already in an Error Disable state, the new member port is
also disabled in the hardware.
3 When a physical port is removed from a port channel in an Error Disable state, the Error Disabled state is
cleared on this physical port (the physical port is enabled in the hardware).
4 You can clear the Error Disabled state with any of the following methods:
•Use shutdown command on the interface.
•Disable the shutdown-on-violation command on the interface (no spanning-tree stp-id portfast [bpduguard
| [shutdown-on-violation]]
).
•Disable STP on the interface (no spanning-tree in INTERFACE mode).
•Disabling global STP (no spanning-tree in CONFIGURATION mode).