ccna exam question mark

ccna exam question mark.2 Configure the switch S2o port to access modeS2(config)#default interface fastEthernetO/15 S2(config)#interface fastEthernetO/15 S2(config-if)#switchport mode access S2(config-if)# spanning-tree portfast S2(config-if)^spanning-tree bpduguard enable port to access mode S2(config-if)#exit configure edge portS2(config)#errdisablerecovery cause bpduguard allows automatic recovery after a port that is shut down because of a BPDU Guard is configured as BPDU Guard S2(config)#errdisablerecovery interval 30 configures the failed port The interval for automatic recovery is 30 seconds.(6) BPDU Guard Debugging The log information popped up on switch S2 is as follows:. 236.Cisco Networking Lab CCNA Lab Guide (Release 2) *Mar 1 04:15:46.587: %SPANTREE-2-BLOCK_BPDUGUARD: Received BPDU on port Fast EthemetO/15 with BPDU Guard enabled. Disabling port. Switch received BPDUs from S3 on port FaO/15 with BPDU Guard enabled, shutting down the port *Mar 1 04:15:46.587: %PM-4-ERR_DlSABLE: bpduguard error detected on FaO/15, putting FaO/15 in err-disable state A bpduguard error was detected on the FaO/15 port of the switch, putting the FaO/15 port in err-disable state2 S2#sh(nv interfaces FastEthernetO/15 View the interface information FastEthemetO/15 is down, line protocol is down (err-disabled) You can see that the FaO/15 port is down due to err-disabled. To turn it back on, please remove the BPDU source and execute shutdown and no shutdown commands in order under the port, or wait for the switch to recover automatically (some output is omitted here)3 Since the port auto-recovery capability of the err-disable state of bpduguard has been configured, every 30 seconds, port FaO/15 will try to auto-recovery enabled, and if BPDUs can still be received, the port will enter the err-disable state again with the following message: *Mar 1 03:31:25.235: %PM4ERR_ RECOVER: Attempting to recover from bpduguard err-disable state on FaO/15/// Attempting to recover from err-disable state *Mar 1 03:31:27.081: %SPANTREE-2-BLOCK_BPDUGUARD: Received BPDU on port FaO/15 with BPDU Guard enabled. disabling port. Port received BPDU again *Mar 1 03:31:27.081: %PM-4-ERR_DISABLE: bpduguard errordetected on FaO/15,putting FaO/15 in err-disable state again to set the port to err-disable state4 When the port is connected to a legitimate host, it can automatically recover from the err-disable state with the following message: *Mar 1 03:31:57.087: %PM-4-ERR RECOVER: Attempting to recover from bpduguard err-disable state on FaO/ 15// After 30 seconds, trying to recover from err-disable state again *Mar 1 03:32:00.753: %LINK-3-UPDOWN: Interface FastEthemetO/15,changed state to up *Mar 1 03:32:01.759: % LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthemetO/15, changed state to up No more BPDUs received, port is turned on, both physical layer and data link layer state is up, port is working normally5 S3#show spanning-tree interface fastEthernet 0/15 detail STP Port 17 (FastEthemetO/15) of VLAN0001 is designated forwarding Port path cost 19,Port priority