Dell MX9116n EMC SmartFabric OS10 User Guide Release 10.5.1 - Page 506

ethernet1/1/7 128.56 128 500 FWD 500 128.56 32769 90b1.1cf4.a625 Loop guard OS10(config)# interface ethernet 1/1/4 OS10(conf-if-eth1/1/4)# spanning-tree guard loop OS10(conf-if-eth1/1/4)# do show spanning-tree interface ethernet 1/1/4 ethernet1/1/4 of vlan1 is root Forwarding Edge port:no (default) port guard :none (default) Link type is point-to-point (auto) Boundary: NO bpdu filter : bpdu guard : bpduguard shutdown-on- violation :disable RootGuard: disable LoopGuard enable Bpdus (MRecords) sent 7, received 20 Interface Designated Name PortID Prio Cost Sts Cost Bridge ID PortID ethernet1/1/4 128.272 128 500 FWD 0 32769 90b1.1cf4.9d3b 128.272 Root guard os10(conf-if-eth1/1/7)# spanning-tree guard root os10(conf-if-eth1/1/7)# do show spanning-tree interface ethernet 1/1/7 ethernet1/1/7 of vlan 1 is Designated Forwarding Edge port: No (default) Link type: point-to-point (auto) Boundary: No, Bpdu-filter: Enable, Bpdu-Guard: Enable, Shutdown-on-Bpdu-Guard-violation: Yes Root-Guard: Enable, Loop-Guard: Disable Bpdus (MRecords) Sent: 6, Received: 6410 Interface Designated Name PortID Prio Cost Sts Cost Bridge ID PortID ---- ethernet1/1/7 128.56 128 500 FWD 500 32769 90b1.1cf4.a625 128.56 Recover from BPDU guard violations 1. When there is BPDU guard violation on a port, OS10 either shuts down the port or moves it to BLOCKED state. Use the following command in CONFIGURATION mode to shutdown the port. The no version of the command moves the port to BLOCKED state. errdisable detect cause bpduguard 2. In CONFIGURATION mode, use the following command to recover the ports from shutting down due to the detection of a BPDU Guard violation. When the recovery option is enabled, the port is brought up after the recovery timer expires. The default recovery timer value is 300 seconds. When the recovery option is disabled, the port remains shut down indefinitely. You must manually bring up the port using the shutdown and no shutdown commands. errdisable recovery cause bpduguard The no version of the command disables the recovery option. 3. To change the recover timer value, use the following command in CONFIGURATION mode. This recovery timer value is applicable only for shutdown case. For Blocking case, the default value of 300 seconds is used. errdisable recovery interval interval-value Example configuration OS10(config)# errdisable detect cause bpduguard OS10(config)# errdisable recovery interval 45 OS10(config)# errdisable recovery cause bpduguard 506 Layer 2