nx.os.and.cisco.nexus.switching.2nd.edition.1587143046

VLAN MAC Address Type age Secure NTFY
Ports/SWID.SSID.LID
---------+-----------------+--------+---------+------+----
+------------------
G - 0026.982e.b043 static - F F sup
eth1(R)
G
10 0026.982e.b043 static - F F supeth1(R)
10 0000.0c07.ac0a dynamic
0 F F 12.0.1054
10 0005.73cd.6c81 dynamic 660 F F 12.
10 0026.982e.b041 dynamic 630 F F 1.0
10 0026.982e.b042 dynamic 0 F F 2.0
10 0026.982e.b044 dynamic 660 F F 4.0
Summary
The Layer 2 switching capabilities of NX-OS provide a scalable, resilient foundation for
your data center. This chapter covered the following topics:
• VLANs segment traffic at Layer 2 to address security concerns or define failure
domains.
• PVLANs provide an additional level of security by enabling administrators to |
subdivide VLANs.
• Spanning Tree provides a mechanism to ensure that physically redundant networks are
logically loop-free. You learned how to configure and tune Rapid-PVST+ and MST.
• Enhancements are available for Spanning Tree such as BPDUGuard, BPDUFilter,
RootGuard, and LoopGuard.
• Links can be aggregated through the use of port-channels and vPCs to simplify
Spanning Tree topologies while making additional bandwidth available for data
traffic.
• Cisco FabricPath represents a new way to build large Layer 2 networks, which
optimizes bandwidth, latency, and system resources such as MAC address tables.
FabricPath accomplishes this by taking the best characteristics from Layer 2 and Layer
3 technologies and combining them.
With NX-OS on the Nexus 7000 and 5000, Cisco provides a highly available
implementation of standards-based Layer 2 technology and builds upon it with new
innovation required to meet the specific demands within today’s data centers.