In such cases, the loss of some BPDUs can cause.
Jan 08, The switch is running rapid-pvst as visible from the show run output"spanning-tree mode rapid-pvst". However, it shows a different result when you do show spanning-tree command. Shouldnt it be showing R-PVST?VLAN Spanning tree enabled protocol"rstp" Root ID Priority Cost 4 Port 1 (GigabitEthernet1)Estimated Reading Time: 7 mins. Dec 05, The primary function of the spanning-tree algorithm (STA) is to cut loops that redundant links create in bridge networks.
The STP operates at Layer 2 of the Open System Interconnection (OSI) model. By means of bridge protocol data units (BPDUs) that exchange between bridges, the STP elects the ports that eventually forward or block traffic. Jan 29, The can use either the per-VLAN spanning-tree plus (PVST+) protocol based on the IEEE D standard and Cisco proprietary extensions, or the rapid per-VLAN spanning-tree plus (rapid-PVST+) protocol based on the IEEE w standard.
A switch stack appears as a single spanning-tree node to the rest of the network, and all stack members use the. Sep 18, To reduce the risk of spanning-tree loops or storms, you can disable VLAN 1 on any individual VLAN trunk port by removing VLAN 1 from the allowed list.
Nov 13, Cisco spanning tree - blocked port 11 posts sporkme. Ars Tribunus Militum Tribus: Dirty Jersey. Registered: Jan 6, Posts: Posted: Tue Nov 12, am. Mar 08, I would suggest setting the span root priority on the current root switch to This would keep the switch as the root. We can look at running the clear spanning-tree detected-protocols command and see if the network returns to normal after the reconvergence.