Connectivity Guide

– port-channel channel-number — Displays MAC address table information for a port-channel
interface, from 1 to 128.
• static — (Optional) Displays static MAC address table entries only.
• vlan vlan-id — (Optional) Displays VLAN information only, from 1 to 4093.
Default Not congured
Command Mode EXEC
Usage Information The network device maintains static MAC address entries saved in the startup conguration le, and reboots and
deletes dynamic entries.
Example (Address)
OS10# show mac address-table address 90:b1:1c:f4:a6:8f
VlanId Mac Address Type Interface
1 90:b1:1c:f4:a6:8f dynamic ethernet1/1/3
Example (Aging
Time)
OS10# show mac address-table aging-time
Global Mac-address-table aging time : 1800
Example (Count)
OS10# show mac address-table count
MAC Entries for all vlans :
Dynamic Address Count : 5
Static Address (User-defined) Count : 0
Total MAC Addresses in Use: 5
Example (Dynamic)
OS10# show mac address-table dynamic
VlanId Mac Address Type Interface
1 90:b1:1c:f4:a6:8f dynamic ethernet1/1/3
Example (Ethernet)
OS10# show mac address-table interface ethernet 1/1/3
VlanId Mac Address Type Interface
1 66:38:3a:62:31:3a dynamic ethernet1/1/3
Supported Releases 10.2.0E or later
Multiple Spanning-Tree
MST is a rapid spanning-tree protocol based on a spanning-tree variation that improves on per-VLAN RPVST+. You can congure Multiple
Spanning-Tree Instances (MSTIs) and map multiple VLANs to one spanning-tree instance to reduce the total number of instances. RPVST+
allows a spanning-tree instance for each VLAN. This 1:1 approach is not suitable if you have multiple VLANs — each spanning-tree instance
costs bandwidth and processing resources.
When you enable MST, all ports in Layer 2 (L2) mode participate in MST. OS10 only supports one MST region.
Achieve load balancing using the MST protocol (MSTP). When you map three VLANs to two multiple spanning tree instances (MSTIs),
VLAN 100 trac takes a dierent path than VLAN 200 and 300 trac.
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Layer 2