When BPDU Guard shuts down a port due to BPDU’s being received on the port, the port will be placed into a shutdown state known as “ERR-Disabled”. To reset this, one can navigate to the interface and bounce the interface (shutdown the interface then bring it back up) When a port...
STP PortFast and BPDU Guard: If using STP, ensure that PortFast and BPDU Guard are configured correctly to prevent accidental loops. Link Aggregation (EtherChannel/LACP): If the link is part of a link aggregation group, verify the configuration of the aggregation protocol (e.g., EtherChannel,...
BPDU (Bridge Data Unit Protocol) STP Loop Guard STP BPDU Filter STP BPDU Guard STP Root Guard Portfast, Root Guard, BPDU Filter and BPDU Guard PVST+ and Rapid PVST+ STP (Spanning Tree Protocol) Example on Packet Tracer RSTP Configuration on Packet Tracer STP Portfast Configuration...
Discussion and Explanation of BPDU Guard (With Cisco Config Example) From Reactive to Proactive: Mastering Network Performance with Switch Monitoring How Does a Network Switch Learn MAC Addresses? How to Find a Device MAC Address on a Cisco Switch (show mac address-table) How to Configure ...
spanning-tree bpduguard enable ! interface Vlan1 ip address 192.168.10.3 255.255.255.0 no ip route-cache shutdown ! interface Vlan2 ip address 192.168.10.3 255.255.255.0 no ip route-cache ! ip default-gateway 192.168.10.1 ip http server 0 Helpful Reply danielnitoi ...
Ruijie(config-if-range)#spanning-tree bpdufilter enable //Enable BPDU filtering on an STP port toprevent the port from sending or receiving BPDUs. Optional Solution 2: Enable PortFast and BPDU guard. Ruijie(config-if-range)#spanning-treeportfast //EnableSTP loop guard on the Access port. Rui...
PortFast BPDU Guard Default is disabled Portfast BPDU Filter Default is disabled Loopguard Default is disabled UplinkFast is disabled BackboneFast is disabled Pathcost method used is short Name Blocking Listening Learning Forwarding STP Active --- --- --- --- --- --- VLAN0001 0 0 0 1 1 ...
Is there other way to find out which STP a switch is running? Thanks. Switch#show spanning-tree summ Switch is in pvst mode Root bridge for: VLAN0001 EtherChannel misconfig guard is enabled Extended system ID is enabled Portfast Default is disabled PortFast BPDU Guard Default is disa...
spanning-tree bpduguard enable end 0 Helpful Reply hslai Cisco Employee In response to kareali@cisco.com 08-01-2016 07:14 AM Are you seeing this issue with new authentications? If a DOT1X client already authorized, I do not think it would get put into cri...
dot1x max-req 7dot1x max-reauth-req 7no cdp enablespanning-tree portfastspanning-tree bpduguard enableend ! Cisco IOS Software, C2960 Software (C2960-LANBASEK9-M), Version 12.2(50)SE4, I have this problem too Labels: Catalyst 2000 LAN Switching 0 Helpful Reply...