Stp Root Selection - Dell Force10 C150 Configuration Manual

Figure 52-8. Enabling BPDU Guard
3/41
Switch with Spanning Tree Enabled
To verify the Portfast BPDU loop guard configuration on a port or port-channel interface, enter the
spanning-tree 0 guard
FTOS Behavior: BPDU Guard and BPDU filtering (see
Tree Group on page
BPDU Guard:
• is used on edgeports and blocks all traffic on edgeport if it receives a BPDU
• drops the BPDU after it reaches the RPM and generates a console message
BPDU Filtering:
• disables Spanning Tree on an interface
• drops all BPDUs at the line card without generating a console message

STP Root Selection

Although the Spanning Tree Protocol determines the root bridge, you can assign a lower priority to one
bridge to increase the likelihood that it will be selected as the root bridge. You can also configure a bridge
to be the root or secondary root.
Force10(conf-if-gi-3/41)# spanning-tree 0 portfast
Force10(conf-if-gi-3/41)#show config
!
interface GigabitEthernet 3/41
no ip address
switchport
spanning-tree 0 portfast bpduguard shutdown-on-violation
no shutdown
Hub
[
interface
command in global configuration mode.
interface]
1054) both block BPDUs, but are two separate features.
bpduguard shutdown-on-violation
Removing an Interface from the Spanning
show
Spanning Tree Protocol | 1059