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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In GLBP, all routers are efficiently utilized to forward packets, so in addition to redundancy we also get load balancing.
What is GLBP? How to Configure GLBP on Router Examples
As previously explained, all routers in GLBP are actively forwarding packet. Assuming the basic interface IP and routing has been pre-configured, the command to enable GLBP in each router is as follows.
On the other hand, we give R1 priorityR2 priorityand R3 with default priority This is to ensure that R1 has the highest priority among the group members. Router with the highest priority number will be elected as the AVG.
If failure happens on the AVG, the role will be granted to another router with next highest priority. With this configuration, R1 will always the first priority to become AVG.
Cisco GLBP Configuration with Example | ICND2
With standard GLBP configuration as above, the default load-balancing algorithm that will be used is round-robin. In our test, we tried traceroute to cloud loopback IP blbp. As you can see, each Client got different routes to reach 8. With this result, we can confirm that all AVFs has been used equally.
GLBP & GLBP Basic Configuration – Cisco & Cisco Network Hardware News and Technology
Weighted algorithm distribute traffic to each AVF based on the weight value assigned to them. An Configuratiom with bigger weight value will get more traffic redirected to it.
The configuration command for the above example scenario is as follows:. As you can see that the first two trace got redirected via R3, while each of the next two traces got redirected via R1 and R2 consecutively.
Gateway Load Balancing Protocol
The next two trace would probably go through R3 again, because R3 has twice the weight of each R1 and R2. Host-dependent algorithm guarantees that the same gateway will always be used for a specific clientas long as there is glbbp changes on the AVF number.
Under some situations this approach could be the best option, for example in case of stateful Confiiguration. If we try traceroute via Client B or Client C we would probably got different gateway than Client A, but each client will keep redirected using the same gateway until there is a change on AVF number.
With GLBP, we can effectively utilize all our routers as the gateway with several different algorithm that we can choose based on our needs. The following two tabs configuratin content below.
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