High availability is an organizational objective that enables resilience by increasing network availability and includes the following components. But the glbp can load balance the traffic between a group of routers. Figure 1 glbp is a cisco proprietary protocol which was continue reading an introduction to glbp in cisco ios. The next section will go into some examples of how hsrp can be. Allow a gateway to assume forcefully the role of active gateway if it has a higher priority than the. Although glbp is not a topic for this exam but not sure why we still have this question.
The other routers are in backup state and will start to forward packets only when the primary router has. Glbp gateway load balancing protocol gateway load balancing protocol glbp protects data traffic from a failed router or circuit, like hot standby router protocol hsrp and virtual router redundancy protocol vrrp, while allowing packet load sharing between a. The configuration of gateway load balancing protocol glbp on cisco router is easy and very much similar to that of hot standby router protocol hsrp and virtual router redundancy protocol vrrp. To configure glbp basic configuration, use the following command on first router primary. Hsrp hot standby router protocol explained networkel. Learn vocabulary, terms, and more with flashcards, games, and other study tools. An introduction to glbp in cisco ios interface technical. However, only one member of the hsrp group is active and its the forwarder of the packets. Or does r1 just route everything through r2 irregardless of what glbp is doing assuming there is a route. We were running a glbp network built on two cisco 3745 routers with 36port switch modules.
Hsrp, vrrp and glbp are the main three first hop redundancy protocols. Glbp behaves very similar to hot standby router protocol hsrp and virtual router redundancy protocol vrrp. If you have exclusively cisco devices then hsrp is your choice. Configure the ip addresses on the routers as follows. This section goes over the commands that are required, along with a sequence that can be used to configure them. Cisco gateway load balance protocol glbp configuration. The differences between hsrp versus vrrp are very slight especially when looking at the basic configuration side by. In addition to hsrp, we have vrrp and glbp, which i mentioned earlier. In vrrp, like with hsrp, a group of routers are configured in which the. First we will talk about hsrp hot standby router protocol.
With hsrp, two or more devices support a virtual router with a fictitious mac address and unique ip address. If you are not sure about hsrp and glbp, please read our hsrp tutorial and glbp tutorial question 1. Configure and cable the ethernet interfaces as indicated in the above diagram. When a subnet device host wants to send traffic, it requests a mac address for the virtual ip gateway by sending an arp request. Difference between hsrp, vrrp and glbp protocols difference between hsrp, vrrp and glbp protocols protocol features hsrp vrrp glbp scope cisco proprietary ieee standard cisco proprietary standard rfc 2281 rfc 3768 none osi layer layer 3 layer 3 layer 2 load balancing no no yes. Interestingly, vrrp does not support ipv6, as ipv6 can provide more robust router discovery through its neighbor discovery protocol. Gateway load balancing protocol glbp is a cisco proprietary protocol and performs the similar function to hsrp and vrrp but it supports load balancing among members in a glbp group. Create and enter into key chain key configuration mode. The terms multilayer switch and router will be used interchangeably throughout this guide. I have decided to look deeper into glbp as i am quite familiar with hsrp or vrrp but the other day i had to troubleshoot a network. In a vrrp configuration, one router is elected as the virtual router master, with the other routers acting as backups in case the virtual router master fails. Dec 26, 2012 in this article we will cover comparison of various first hop redundancy protocols. Catalyst 3750 metro switch software configuration guide.
The hsrp protocol and glbp protocol are cisco propriety whereas the. In a vrrp configuration, one router is elected as the virtual router master, with the other routers. Vrrp virtual router redundancy protocol is an internet protocol that provides a way to have one or more backup routers when using a statically configured router on a local area network lan. Pdf the first hop redundancy protocols includes three protocols hot.
Cisco provides hsrp hot standby routing protocol, vrrp virtual router redundancy protocol and glbp gateway load balancing protocol for first hop redundancy. Hsrp vs vrrp vs glbp redundancy protocols in this article we will discuss the similarities and differences between the 3 first hop redundancy protocols supported by cisco devices. A few basic commands are used to configure hsrp on a device see table 1. Catalyst 3750 metro switch software configuration guide, 12. One of the major differences between the two protocols is that in vrrp, you can use the physical interface ip address as the. In this article, networking consultant sean wilkins explains how hot standby redundancy protocol hsrp devices communicate together. Join cbt nuggets trainer jeremy cioara as he walks through the configuration of hsrp, complete with virtual ip, priority, interface tracking. Vrrp is a standard protocol, while hsrp is a cisco proprietary. These are hot standby router protocol hsrp, virtual router redundancy protocol vrrp and gateway load balancing protocol glbp. Sep 15, 2008 hsrp and vrrp are practically identical, while glbp expands their functionality to offer load balancing. Jun 26, 2017 here we have some protocols to make our network redundant, they are hsrp, vrrp and glbp. Comparison and difference between hsrp, vrrp and glbp. Vrrp is the ieee standard equivalent of hsrp cisco proprietary and it is the first choice for interoperability.
By doing this the tracking object is going to go into the down state, and when it goes to down state, thats gonna cause the weighting on fastetherent00 to be decremented by the value of 51, we were reducing the current weight of 100, by 51 which is gonna give it up new weighting value of 49, based on command if we lower then 50, then no longer want to be a avf, for our virtual. An interface begins in an initial state when first configured with hsrp, or. Oct 24, 2008 here is a brief description of the major differences between hsrp, vrrp and glbp. By configuring one of the redundancy protocols hsrp, vrrp, glbp we can achieve just that. Apr 29, 2015 difference between hsrp, vrrp and glbp protocols 1.
Hsrp configuration best cisco ccna ccnp and linuxcentos. The figure below shows a basic hsrp topology with two routers forming an hsrp or standby group. In this article i covered comparison of various first hop redundancy protocols. This example shows how to activate hsrp for group 1 on an interface. Aug 06, 2019 there are two methods a lan host can determine its default gateway or firsthop router. Hsrpv1version 1 of the hsrp, the default version of hsrp. Hsrp and vrrp allow multiple routers to participate in a virtual router group configured with a. Sep 19, 2017 vrrp is part of both ipv4 the version of ip that most networks currently use and ipv6. Ive been following your two previous tutorials on hsrp and vrrp. In response to the arp request, avg will provide one of the virtual mac address provided to avf by avg. Oct 12, 20 the configuration of gateway load balancing protocol glbp is very similar to that of hot standby router protocol hsrp and virtual router redundancy protocolvrrp, and like them is not overly complex to initially configure and use the default settings. The hot standby router protocol hsrp provides network redundancy for ip networks. Glbp uses a weighting scheme to determine the forwarding capacity of each router in the glbp group.
By doing this the tracking object is going to go into the down state, and when it goes to down state, thats gonna cause the weighting on fastetherent00 to be decremented by the value of 51, we were reducing the current weight of 100, by 51 which is gonna give it up new weighting value of 49, based on command if we lower then 50, then no longer want to be a avf, for our virtual macaddress. May 19, 2014 glbp is a more advanced version of hot standby router protocol. You may verify glbp configuration and find out which role each router is playing using the show glbp command. The following sample configuration sets up two routers r1. Each router has its own ip configured to its lan interface. First hop redundancy protocols configuration guide, cisco ios xe. But under the covers there are some significant differences. Hsrp vs vrrp protocols compared and explained routerfreak. Hsrp and vrrp, multiple glbp routers can be active, achieving both redundancy. The best scenario i can imaging for glbp is in a branch office with two wan circuit. Hsrp vs vrrp vs glbp redundancy protocols networks training. Difference between hsrp, vrrp and glbp protocols difference between hsrp, vrrp and glbp protocols protocol features hsrp vrrp glbp scope cisco proprietary ieee standard cisco proprietary standard rfc 2281 rfc 3768 none osi layer layer 3 layer 3 layer 2 load balancing no no yes multicast group ip address 224. The most common arrangement is to specify one router to serve as the router for forwarding packets from a group of hosts on a lan. Glbp gateway load balancing protocol gateway load balancing protocol glbp protects data traffic from a failed router or circuit, like hot standby router protocol hsrp and virtual router redundancy protocol vrrp, while allowing packet load sharing between a group of redundant routers.
Hsrp configuration interface fastethernet00 ip address 10. Cisco has included ipv6 support in hsrp and glbp, though. Once youve had the ability to read the first article in this series or if you have. Although it is possible to configure multiple virtual router groups to achieve load balancing in case of hsrp and vrrp, but it requires configuring different default gateways on different hosts, which is an extra administrative.
Hot standby router protocol hsrp virtual router redundancy protocol vrrp gateway load balancing protocol glbp note. Todays topic takes this idea a step beyond what is possible with those protocols by introducing the concept of gateway load balancing protocol glbp. The following chart provides difference hsrp vs vrrp vs glbp protocols. High availability vrrp, hsrp, glbp free ccna study guide. Also i would recommend to look at the hsrp and vrrp lessons before you continue with glbp. Layer 3 redundancy with hsrp sunset learning institute. Hsrp, vrrp, glbp overview when designing a network, one of the common things to focus on after simple access is how the network will deal with failure. Is there a way to setup interface tracking like in hsrpvrrp and if so, how does that play out with load balancing. Dec 08, 2012 hsrp, vrrp and glbp are the main three first hop redundancy protocols.
This section will first go over the configuration process steps and commands that are used to perform a basic glbp. To detect a gateway failure, glbp members communicate with each. The article then delves into the commands and configuration steps required to get hsrp up and operating between devices. Chapter 40 configuring hsrp, vrrp, and glbp understanding hsrp figure 401 typical hsrp configuration hsrp versions the switch supports these hot standby router protocol hsrp versions. Hsrp is a protocol which provides redundancy and it is a cisco proprietary protocol. The router r2 is configured with the default priority. This chapter describes how to use hot standby router protocol hsrp, virtual router redundancy. Where previously you would need a mix of hsrp groups to provide different default gateways and manually load balance the client. Glbp performs a similar function for the user as hsrp and vrrp. Here we have some protocols to make our network redundant, they are hsrp, vrrp and glbp. Each router has its own ip configured to its lan interface 192. A vrrp router is configured to run vrrp in conjunction with one or more other. The hsrp configuration can be tricky at times, so this article will cover the fundamental points also presenting a gsn3 lab. What the main difference between hsrp, vrrp and glbp.
Glbp stands for gateway load balancing protocol and just like hsrp vrrp it is used to create a virtual gateway that you can use for hosts. This topology simulates an enterprise network with the three layers recommended by cisco. In our simple network above, we want to provide redundancy to the border routers r1 and r2 which connect users to the internet. Lets think about the interaction between hsrp and stp spanning tree protocol, if we have switches interconnected and redundant fashion where we are running stp, we need to realize that stp has no knowledge of hsrp, and it possible to have stp blocking the link that is our best path, link that leave directly to our active hsrp router, and that could cause our traffic to take a. This goes away with glbp as you can provide one default gw address and load balance the egress traffic from site. If you have no idea what a virtual gateway is then read my introduction to gateway redundancy first. Glbp is a cisco proprietary protocol which was made available in. Lets begin by viewing the network scenario i used for this blog. Hot standby router protocol hsrp one picture summary.
Hsrp allows multiple routers to be configured with the virtual ip default gateway. Hsrp and vrrp are practically identical, while glbp expands their functionality to offer load balancing. The differences between hsrp versus vrrp are very slight especially when looking at the basic configuration side by side. In hsrp and vrrp only one router is serving as an active virtual gateway router. The glbp feature is similar to both the hsrp and the vrrp features that exist in the cisco ios software. The basic configuration closely resembles the hot standby router protocol hsrp configuration. You must configure each gateway in a glbp group with the same group number, and at least one. Hot standby routing protocol hsrp lab hot standby routing protocol hsrp lab basic objectives. The hsrp feature is documented in the configuring ip services chapter of the cisco ios ip configuration guide and in the cisco ios ip command reference, volume 1 of 3.
Configuring hsrp, vrrp, and glbp this chapter describes how to use hot standby router protocol hsrp, virtual router redundancy protocol vrrp, and the gateway load balancing pr otocol glpb on the cisco me 3400e ethernet access switch. Figure 51 shows the network topology for the configuration that follows, which shows how to configure hsrp using the commands covered in this chapter. Difference between hsrp, vrrp and glbp protocols 1. In order to take the right decision for your network you should know the basics regarding all three. The configuration of gateway load balancing protocol glbp is very similar to that of hot standby router protocol hsrp and virtual router redundancy protocolvrrp, and like them is not overly complex to initially configure and use the default settings. Hsrp, vrrp and glbp redundancy protocols infrastructure. We will use the figure below as an example network topology. Also, keep in mind that hsrp is available on almost all layer 3 platforms, while glbp is limited to routers and a small subset of catalyst switches. Vrrp router preemption allows a virtual router backup with a higher priority that comes up to take over the virtual router backup that was elected to become the virtual router master.
Hsrp provides routing redundancy for routing ip traffic without being dependent on the. Gateway load balancing protocol glbp protects data traffic from a failed device or circuit, like hot standby router protocol hsrp and virtual router redundancy protocol vrrp, while allowing packet load sharing between a group of redundant devices. The router r1 is configured with a priority 110 that is higher than the default priority 100. As for letting the routing protocol handle the switch over, well the first hop redundancy is there for end devices that have a single default gateway. You can use either on a cisco router, and in function they provide the same service. Vrrp stands for virtual route rendundancy protocol. Gateway load balancing protocol glbp geeksforgeeks.
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