GLBP Concepts
Lesson 3: GLBP
GLBP Operation
HSRP and VRRP, which were introduced before Gateway Load Balancing Protocol (GLBP), balanced the packet load per subnet, as shown in Figure 6-7. However, because traffic loads vary unpredictably from subnet to subnet, Cisco wanted an FHRP option with better load-balancing options than just the per-subnet load balancing of HSRP and VRRP. To meet that need, Cisco introduced GLBP.
GLBP balances the packet load per host by using an active/active model in each subnet. Each GLBP router in a subnet receives off-subnet ...
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