#Cisco mac address table aging time how to
#Cisco mac address table aging time plus

When you use this command in the global configuration mode, the age values of all VLANs for which a configuration has not been specified are modified and those VLANs with specifically modified aging times are not modified. If the system rounds the value to a different value from that specified by the user (from the rounding process), the system returns an informational message. The age value may be rounded off to the nearest multiple of 5 seconds.

#Cisco mac address table aging time how to

This example shows how to restart the protocol migration on a specific interface:Įnter 0 seconds to disable the aging process. If you enter the clear spanning-tree detected-protocol command with no arguments, the command is applied to every port of the device. To force the MST port to renegotiate with the neighbors, enter the clear spanning-tree detected-protocol command. Similarly, an MST port assumes that it is a boundary port when the bridges to which it is connected have joined the same region. For example, a Rapid PVST+ bridge that is designated for a legacy 802.1D bridge stays in 802.1D mode even after the legacy bridge has been removed from the link. These mechanisms are not always able to revert to the most efficient mode. An MST bridge can detect that a port is at the boundary of a region when it receives a legacy BPDU or an MST BPDU that is associated with a different region. For example, a bridge running Rapid PVST+ can send 802.1D bridge protocol data units (BPDUs) on one of its ports when it is connected to a legacy bridge.

#Cisco mac address table aging time plus

Rapid per VLAN Spanning Tree Plus (Rapid PVST+) and Multiple Spanning Tree (MST) have built-in compatibility mechanisms that allow them to interact properly with other versions of IEEE spanning tree or other regions. To clear the dynamic address entries from the MAC address table in Layer 2, use the clear mac address-table dynamic command.Ĭlear mac address-table dynamic Syntax Description This chapter describes the Cisco NX-OS Layer 2 commands. Switchport private-vlan trunk native vlan Switchport private-vlan trunk allowed vlan Switchport private-vlan association trunk Switchport mode private-vlan trunk secondary Switchport mode private-vlan promiscuous trunk Spanning-tree port type edge bpduguard default

Spanning-tree port type edge bpdufilter default Cisco NX-OS Layer 2 Commands Table Of Contents