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GLBP is a Cisco proprietary protocol that attempts to overcome the limitations of existing This section will first go over the configuration process steps and commands that are used to perform a basic GLBP configuration. An example. In the previous lesson we showed you a load balancing mechanism and I’ll still argue that that’s the best way to go. Gateway Load Balancing Protocol – GLBP is .

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The next two trace would probably go through R3 again, because R3 has twice exakple weight of each R1 and R2. Comment on this post.

Gateway Load Balancing Protocol. In our test, we tried traceroute to cloud loopback IP 8. This method is the default. The configuration command for the above example scenario is as follows:. And it could have done this because spanning tree led us one way and we need to go another. Router-B show glbp brief.

Indicates that the gateway is next in line to be the active virtual gateway AVG.

Change the default GLBP load balancing behavior to using weighting. GLBP preemption is disabled by default. One virtual forwarder within a GLBP group is elected as active virtual forwarder for a specified virtual MAC address, and is responsible for forwarding packets sent to that Configuratuon address.

If failure happens on the AVG, the role will be granted to another router with next highest priority. Feel free to contact us if you have any further questions donfiguration concerns. You still have fail over by the way, you still have fail over, but we get load balancing baked into this technology. Enter the key string that will be used to authenticate with neighboring devices.


Configure GLBP to use the tracked object to influence its weighting. The default setting is GLBP is a workable technology. Different interfaces can be tracked to decrement the GLBP weighting by varying amounts.

Cisco Gateway Load Balance Protocol (GLBP) Configuration Process and Commands

Here is a sample output, similar to what we saw for HSRP. Specifies a load balancing method where each virtual forwarder in turn is included in address resolution replies for the virtual IP address. Table 4 covers all the commands that are required to perform these steps.

Well for large volumes of traffic, it results in some pretty inefficient and potentially problematic traffic flow. Gateway Load Balancing Protocol on the other hand, allows you to load balance within one group. See All Related Store Items. The line-protocol parameter will track the protocol state of the configured interface. Newsletter Subscribe to be notified of future posts. R1 config-if glbp 1 load-balancing weighted. R1 config-if ip address Subscribe to newsletter To be informed of the latest articles, subscribe:.

R2 config-if glbp 1 load-balancing weighted. Router config hostname R1. Indicates that the virtual MAC address has not been assigned or learned. You can send me a message on LinkedIn or email to arranda. Configures the hello timer to be set to 5 seconds and the hold timer to be 18 seconds.

Configuring redundancy with GLBP | CiscoZine

Weighted algorithm distribute traffic to each AVF based on the weight value assigned to them. You can configure GLBP in such a way that traffic from LAN clients can be shared by multiple routers, thereby sharing the traffic load more equitably among available routers. The redundancy scheme of GLBP enables you to preempt an active virtual gateway with a higher priority backup virtual gateway that has become available.


R1 config-if no shutdown. We call them active virtual forwarders, and there is a virtual MAC address that is tied to each of them. If a key-chain is configured with the command above, follow these next few steps to create the key-chain. The group-number can be any value from 1 to The load sharing available are: Figure shows the network topology for the configuration that follows, which shows how to configure GLBP using commands covered in this chapter.

Create a key chain using the name testchain and enter into key chain configuration mode. Latest posts by Arranda Saputra see all. I hope that this article provided some insight into the configuration steps that are required to configure GLBP and get it up and running. HSRP is going to give us what we need, and that’s predictability. Back in the day when HSRP was created, they only had one.

I am IT practitioner in real life with specialization in network and server infrastructure. But there is far more intelligence baked into this technology, where when a client ARPs, short for Address Resolution Protocol, for it’s default gateway, one client could get one response, a different client would get a different response, because all of the routers are forwarding.

R2 config-if glbp 10 priority R2 config-if ip address See All Related Articles. R1 config-if glbp 1 track 1 decrement