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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Configures the hello timer to be set to 5 seconds and the hold timer to be 18 seconds. R1 config-if no shutdown. I have years of experience in design, analysis, operation, and optimization of infrastructure solutions for enterprise-scaled network.

R1 config-if glbp 10 ip With this configuration, R1 will always the first priority to become AVG. Because what can happen is traffic can go up to the distribution confjguration and then get forwarded across the distribution layer link to the other router.

Which MAC address it returns depends on which load-balancing algorithm it is configured to use. The virtual IP address has been configured or learned but virtual gateway configuration is not complete.

Configuration Example: GLBP > High Availability Commands for CCNP BCMSN

GLBP members communicate between each other through hello messages sent every 3 seconds to the multicast address Enable GLBP authentication using the configured key chain and group number of 1. The redirect-timer is the amount of time that passes before the AVG assumes that the forwarder is not going to return; the timeout is the amount of time until the virtual MAC address that was used by the failed AVF is no longer functional.


Fonfiguration we try traceroute via Client B or Client C we would probably got different gateway than Client A, examp,e each client will keep redirected using the same gateway until there is a change on AVF number. The main difference is that GLBP allows for load balancing between the two routers rather than using just one and leaving the other unused until gglbp.

Virtual gateway is attempting to become the active or standby virtual gateway. You can use a simple text password authentication scheme between GLBP group members to detect configuration errors. Note that only configuratioh commands specific to GLBP are shown in this example.

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

A router within a GLBP group with a different authentication string configuratipn other routers will be ignored by other group members. Assuming the basic interface IP and routing has been pre-configured, the command to enable GLBP in each router is as follows. This is to ensure that R1 has the highest priority among the group members.

R1 copy running-config startup-config. Gateway Load Balancing Protocol. R2 config-if glbp 1 load-balancing weighted. I hope that this article provided some insight into the configuration steps that are required to configure GLBP and get it up and running. I’ll tell you the reality though and the reality is this.

About Affiliates Cisco Systems, Inc. With standard GLBP configuration as above, the default load-balancing algorithm that will be used is round-robin. R2 config-if glbp 10 preempt.


Page 1 of 1. This router has the highest priority value, or the highest IP address in the group, if there is no highest priority. R1 config-if glbp 1 authentication key-chain testchain.

ecample Here is a sample output, similar to what we saw for HSRP. This is a transitory state because a virtual forwarder changing to a disabled state is deleted.

GLBP Configuration on Cisco

R1 config-if glbp 10 priority GLBP Figure shows the network topology for the configuration that follows, which shows how to configure GLBP using commands covered in this chapter. It seems pretty benign, right? You could only get any kind of load balancing if you add multiple groups. Figure shows the network topology for the configuration that follows, which shows configuratuon to configure GLBP using commands covered in this chapter. Feel free to contact us if you have any further questions or concerns.

Different interfaces can be tracked to decrement the GLBP weighting by varying amounts. I am IT practitioner in real life with specialization in network and server infrastructure.

In our test, we tried traceroute to cloud loopback IP 8. You still have fail over by the way, you still have fail over, but we get load balancing baked into this technology.