Table of Contents
What is preempt in GLBP?
You can enable the GLBP preemptive scheme using the glbp preempt command. Preemption allows a backup virtual gateway to become the AVG, if the backup virtual gateway is assigned a higher priority than the current AVG.
What does GLBP stand for?
Gateway Load Balancing Protocol
Gateway Load Balancing Protocol (GLBP) is a Cisco proprietary protocol that attempts to overcome the limitations of existing redundant router protocols by adding basic load balancing functionality. In addition to being able to set priorities on different gateway routers, GLBP allows a weighting parameter to be set.
When working with GLBP What is the role of the average?
The AVG (Active Virtual Gateway) has a special role in GLBP (Gateway Load Balancing Protocol). Two or more routers on a LAN subnet form a GLBP group. Each GLBP router interface has a unique physical IP address.
Why do we use preempt in HSRP?
the preempt is to allow the once active device to take over for the stanby once it comes back online.
How do I check my Glbp load balance?
GLBP load Balancing : Round-Robin : AVG will assign the virtual Mac addresses serial wise, like first virtual Mac address is assigned to AVF1, then to AVF2 etc. Host-dependent : If particular host needs specific virtual Mac address every time then specific AVF is assigned to the hosts by the AVG.
How does preemption work in HSRP?
The standby preempt feature means that the router with the higher priority is always the active router if it is available. If two routers have the same priority, then the interface with the highest physical IP address becomes active.
How to configure a router to take over as GLBP forwarder?
To configure a router to take over as active virtual forwarder (AVF) for a Gateway Load Balancing Protocol (GLBP) group if it has higher priority than the current AVF, use the glbp forwarder preempt command in interface configuration mode. To disable this feature, use the no form of this command. GLBP group number in the range from 0 to 1023.
What is redundancy and forwarder preemption in GLBP?
The redundancy scheme of GLBP enables you to preempt an active virtual gateway with a higher priority backup virtual gateway that has become available. Forwarder preemption works in a similar way, except that forwarder preemption uses weighting instead of priority and is enabled by default.
How do I enable GLBP preemption?
You can enable the GLBP preemptive scheme using the glbp preempt command. Preemption allows a backup virtual gateway to become the AVG, if the backup virtual gateway is assigned a higher priority than the current AVG. GLBP uses a weighting scheme to determine the forwarding capacity of each router in the GLBP group.
What is GLBP priority and how to configure it?
Priority also determines if a GLBP router functions as a backup virtual gateway and the order of ascendancy to becoming an AVG if the current AVG fails. You can configure the priority of each backup virtual gateway with a value of 1 through 255 using the glbp priority command.