CHAPTER
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18-1
Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
OL-20002-02
18
Configuring GLBP
This chapter describes how to configure the Gateway Load Balancing Protocol (GLBP).
This chapter includes the following sections:
• Information About GLBP, page 18-1
• Licensing Requirements for GLBP, page 18-6
• Prerequisites for GLBP, page 18-6
• Guidelines and Limitations, page 18-7
• Configuring GLBP, page 18-7
• Verifying GLBP Configuration, page 18-15
• GLBP Example Configuration, page 18-15
• Default Settings, page 18-16
• Additional References, page 18-16
• Feature History for GLBP, page 18-17
Information About GLBP
GLBP provides path redundancy for IP by sharing protocol and Media Access Control (MAC) addresses
between redundant gateways. Additionally, GLBP allows a group of Layer 3 routers to share the load of
the default gateway on a LAN. A GLBP router can automatically assume the forwarding function of
another router in the group if the other router fails.
This section includes the following topics:
• GLBP Overview, page 18-2
• GLBP Active Virtual Gateway, page 18-2
• GLBP Virtual MAC Address Assignment, page 18-2
• GLBP Virtual Gateway Redundancy, page 18-3
• GLBP Virtual Forwarder Redundancy, page 18-3
• GLBP Authentication, page 18-4
• GLBP Load Balancing and Tracking, page 18-5
• High Availability, page 18-6
• Virtualization Support, page 18-6
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