In the default configuration of a new switch, the switch operates in "out-of-the-box" mode, meaning all ports are set to access mode and belong to the default VLAN (VLAN 1). Spanning Tree Protocol (STP) is enabled by default to prevent loops in the network. Additionally, there is no password set for console, VTY, or enable access, and no IP address is assigned to the switch interfaces until configured by the user.
The switch is receiving BPDUs and populating the MAC address table, but not sending data.
Designated
The default bridge priority on Cisco switches is 32768. This value is used in the Spanning Tree Protocol (STP) to determine the root bridge in a network. Lower bridge priority values are preferred, so if multiple switches have the same priority, the switch with the lowest MAC address becomes the root bridge.
In a Spanning Tree Protocol (STP) environment, the root bridge is determined by the Bridge ID, which consists of the Bridge Priority and the MAC address. By default, all switches have a Bridge Priority of 32768, so the switch with the lowest MAC address will become the root bridge. Therefore, if all switches have default STP configurations, the switch with the lowest MAC address will be elected as the root bridge.
Yes, By default port security is disabled on a Cisco switch. If it is enabled the default violation mode is shutdown with a maximum MAC address count of 1. Even if port-security is enabled it will not place a port into the shutdown state until either MAC address sticky or a static MAC address is configured on the port.
It is configured in VTP server mode. STP is automatically enabled. All switch ports are assigned to VLAN1.
The default value for network diameter on a STP configuration is 7 (seven). This value can be changed, using the command: Switch(config)#spanning-tree vlan 1 root primary diameter 5 This command changes the network diameter 50 5 (five) hops from end to end
Catalyst switches have support for several technologies that may be used in larger networks, and that are not available on home switches - for example, VLANs, and STP (Spanning-Tree Protocol), as well as options for port security.Catalyst switches have support for several technologies that may be used in larger networks, and that are not available on home switches - for example, VLANs, and STP (Spanning-Tree Protocol), as well as options for port security.Catalyst switches have support for several technologies that may be used in larger networks, and that are not available on home switches - for example, VLANs, and STP (Spanning-Tree Protocol), as well as options for port security.Catalyst switches have support for several technologies that may be used in larger networks, and that are not available on home switches - for example, VLANs, and STP (Spanning-Tree Protocol), as well as options for port security.
STP stand for Spaning Tree Protocol. It's used to avoid the L2 loop in the network. many factor are belong to STP. such as Root Switch, BPDU, Root Port, Forward port, blocking port.
Based on the location of the root bridge, theother switches determine which of their ports has the lowest path cost to the root bridge. These ports are called root ports, and each switch (other than the current root bridge) must have one.
When in the switch none of the case's is true, the code at the default: is executed.