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CCNP Exam Prep Question of the Week

Author: Guest Authors 25 March 2013 2,148 views No Comments

Which FHRP(First Hop Redundancy Protocol) supports multiple active forwarding gateways per group?

  1. HSRP (Hot Standby Router Protocol)
  2. VRRP (Virtual Router Redundancy Protocol)
  3. GLBP (Gateway Load Balancing Protocol)


The correct answer is 3.

Unlike HSRP and VRRP, GLBP can have multiple routers forwarding traffic for a single virtual IP address. It achieves this by using multiple virtual MAC addresses for a single virtual address. A single router is still in control of the virtual IP address and answers ARP requests for that IP address. This router effectively balances the load over the different forwarding routers.

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