Note that only the commands specific to hsrp are shown in this example. Hsrp is configured between two devices which each have a single interface that goes towards the core of the network, an interface that connects them together not an hsrp requirement, and an interface that connects into a common subnet. Lets take a look at a configuration example so you can see how this works. In this scenario, on site a multiple clients reside on the fast ethernet segment of 198. View and download cisco nexus 9000 series configuration manual online. Abstract in this lab, i will simulate failsafe protocols designed in cisco routers and layer 3 switches to simulate load balance or distribute traffic through a network.
See cisco glbp in action, and how to configure and verify that it is working. Enter the key string that will be used to authenticate with neighboring devices. Figure 402 mhsrp load sharing 121235 active router for group 1. I hope that this article provided some insight into the configuration steps that are required to configure glbp and get it up and running. Aug 09, 2012 i will take a little break regarding multicast.
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. Lets take a look how to setup vrrp using this topology. We got switch sw2 and sw3, and we want to setup sw2 to be the master vrrp routerswitch and switch sw3 to be the backup routerswitch. A backup virtual gateway can become the avg only if the current avg fails. Glbp gateway load balancing protocol explained networkel. Kindly assist in troubleshooting glbp functionality glbp has been configured one 2951 and 3945 using the etherswitch module on 3945 routers, using ospf. Also i would recommend to look at the hsrp and vrrp lessons before you continue with glbp. All the clients need access to servers on site b hsrp will provide the clients with uninterrupted access to servers of site b. Prerequisites for gateway load balancing protocol before configuring the glbp feature, ensure that the routers can support multiple mac addresses on the physical interfaces. Oct 04, 2010 several employees need to have access to send data, no matter what happens to the network. I will use the following topology to configure glbp. Glbp works by making use of a single virtual ip address, which is configured as the default gateway on the hosts. Glbp main distinction from hsrp and vrrp is its ability to natively provide gateway load balancing to end devices, hence increase in protocol. Understanding gateway load balancing protocol glbp gateway load balancing protocol glbp is a cisco proprietary solution for redundancy and load balancing in an ip network.
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. The different routers that assume the forwarding role use different virtual mac addresses for the same virtual ip address to which packets are forwarded by. We will use the figure below as an example network topology. If there are more than 4 gateways in a glbp group then the rest will become standby virtual forwarder svf which will take the place of a avf in case of failure a is not correct. Hsrp vrrp glbp router computing networking standards.
Rafat khandaker packet tracer hsrp vrrp glbp 051816. Mar, 2019 enable glbp tlbp using the configured key chain and group number of 1. Note that only the commands specific to glbp are shown in this example. The figure below shows a basic glbp topology with r1 and r2 forming a glbp group. Configuration examples for gateway load balancing protocol additional references command reference glossary. The router r1 is the avg for the glbp group and is responsible for the virtual ip address 192. In this example, routera is the avg and routerb is an avf. To enhance the reliability of the network you decide to configure glbp gateway load balancing protocol, in addition you want to configure loadbalancing to make optimal use of the resources you have. Start studying cisco gateway load balancing protocol glbp. Glbp allow automatic selection and simultaneous recovery from first hop router failures. Once switchb recovers, it will not retake its role of active router, despite having a higher priority. May 06, 2011 see cisco glbp in action, and how to configure and verify that it is working.
Aug 06, 2019 gateway load balancing protocol glbp tutorial. We can configure glbp in cisco ios router using three algorithm. Jan 08, 20 glbp configuration example on two ios routers the configuration example of glbp on ios is as follows router r1 perspective. If you have no idea what a virtual gateway is then read my introduction to gateway redundancy first. Glbp gateway load balancing protocol provides first hop redundancy for devices that use a default gateway. In glbp, all routers are efficiently utilized to forward packets, so in addition to redundancy we also get load balancing.
Gateway load balancing protocol glbp is a cisco proprietary protocol that attempts to. Pdf performance evaluation of first hop redundancy. Glbp configuration example pdf 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. In this section, the configuration is extended to show basic glbp authentication using key chains, altering the default load balancing behavior to weighting, and basic interface line protocol tracking. The main disadvantage of hsrp and vrrp is that only one gateway is elected to be the active gateway and used to forward. You can configure glbp in such a way that traffic from lan. Figure 51 shows the network topology for the configuration that follows, which shows how to configure hsrp using the commands covered in this chapter. Glbp gateway load balancing protocol glbp gateway load balancing protocol is a cisco proprietary protocol that attempts to overcome the limitations of existing redundant router protocols by adding basic load balancing functionality. Glbp configuration example pdf glbp is a cisco proprietary protocol that attempts to overcome the limitations of existing this section will first go over the configuration process steps. Create and enter into key chain key configuration mode. Icnd2 hsrp vrrp glbp question 1 which one of these is a valid hsrp virtual mac address. Although vrrp or hsrp provides a network link redundancy to router traffic in a or a number of routers in case of failure to the main active routes, but they do not allow to fully utilizing the available network resources. Figure 52 shows the network topology for the configuration that follows, which shows how to configure glbp using commands covered in this chapter. In our simple network above, we want to provide redundancy to the border routers r1 and r2 which connect users to the internet.
Jun 25, 2017 glbp is a cisco proprietary protocol like hsrp, but has differences surely and we will talk about how gateway load balancing protocol glbp works, what is gateway load balancing protocol glbp. Provide redundancy on your cisco routers with glbp techrepublic. 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. Configuration tasks, page 6 monitoring and maintaining glbp, page 10 configuration examples, page 10 command reference, page 12 glossary, page 38 feature overview the gateway load balancing protocol feature provides automatic router backup for ip hosts configured with a single default gateway on an ieee 802. Enable glbp tlbp using the configured key chain and group number of 1.
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 enhance the reliability of the network you decide to configure glbp gateway load balancing protocol, in addition you want to configure loadbalancing. As previously explained, all routers in glbp are actively forwarding packet. An ip address is assigned as a virtual ip address from the local subnet which is configured as a default gateway for all the local. Hsrp overview and basic configuration cisco community.
Hot standby router protocol hsrp configuration pearson. For this example, ill use hsrp goup one and hsrp group two. Provide redundancy on your cisco routers with glbp by david davis ccie in networking on october 6, 2005, 12. Biggest difference of gateway load balancing protocol glbp is load balancing. For the example in this section, the topology shown in figure 1 is used.
Apr 29, 2015 glbp gateway load balancing protocol 1. Hsrp use case the figure 4 defines the overall structure. Aug 11, 2019 glbp configuration example pdf posted on august 11, 2019 by admin 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. The different routers that assume the forwarding role use different virtual mac addresses for the same virtual ip address to which packets are forwarded by the hosts. First hop redundancy protocols configuration guide, cisco ios release 15sy by cisco. By configuring one of the redundancy protocols hsrp, vrrp, glbp we can achieve just that. Basic glbp configuration is nearly identical to hsrp. The video demonstrates glbp configuration on two routers providing an ip gateway. See the configuring mhsrp section on page 4010 for the example configuration steps. Gateway load balancing protocol glbp geeksforgeeks. On router a, priority for group one is higher, making it active for group one, while on router e, priority for group two is higher, making it active for group two. You must configure each gateway in a glbp group with the same group number, and at least one gateway in the read more.
Cisco gateway load balance protocol glbp configuration. Cisco ios xr complete getting started examples guide, part 22. Basic cisco commands by marcus nielson 2014 configuring basic switch settings switch examples enter enable if the prompt has changed back to switch. Glbp operation best cisco ccna ccnp and linuxcentos pdf. I have decided to look deeper into glbp as i am quite familiar with hsrp or vrrp but the other day i. Glbp gateway load balancing protocol cisco systems.
For example, you might configure an interface on switch 1 as an active router and one on switch 2 as a standby router and also configure another interface on. Vrrp configuration best cisco ccna ccnp and linuxcentos. Several employees need to have access to send data, no matter what happens to the network. Router r1 is also the avf for the virtual mac address 0007. Hsrp vrrpd glbp standard rfc2281 rfc3768 none load balancing no no yes osi layer3 layer3. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Cisco gateway load balancing protocol glbp quizlet. The following chart provides a quick breakdown of each protocol.
The router r2 is configured with the default priority communication between r4 continues without disruption or change at the host side. Scribd is the worlds largest social reading and publishing site. Gateway load balancing protocol glbp is one of the nhrp kind protocols that protects traffic from a router or circuit. If switchb was powered on first, it would become the active router. This book will help you memorize commands and concepts as you work to pass the ccnp bcmsn exam 642812. Glbp gateway load balancing protocol and its name suggests one of the big benefits, its bring to the table is the ability to do loadbalancing easier than we could do otherwise. Hot standby router protocol hsrp one picture summary.
If switchb fails, switcha would take over as the active router. Glbp provides load balancing over multiple router gateways using a single virtual ip address and multiple virtual mac addresses. The ccnp bcmsn portable command guide is filled with valuable, easytoaccess information and is portable enough for use whether youre in the server room or the equipment closet. In the world of first hop redundancy, we have plenty of choices. 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. Hsrp vrrp glbp free download as powerpoint presentation. Oct 21, 2010 in the world of first hop redundancy, we have plenty of choices. Gateway load balancing protocol is a cisco proprietary protocol for both redundancy and load balancing in cisco switches and routers. Configuration examples for gateway load balancing protocol, page. After configuration, the loadbalancing is working properly, as the route from the local systems periodically changes from route 1 to the othe. This is gonna be very similar with hsrp configuration. Glbp is a cisco proprietary protocol like hsrp, but has differences surely and we will talk about how gateway load balancing protocol glbp works, what is gateway load balancing protocol glbp. Note for mhsrp, you need to enter the standby preempt interface configuration command on the hsrp interfaces so that if a router fails and then comes back up, preemption restores load sharing. A explanation with hsrp, two or more devices support a virtual router with a fictitious mac address and unique ip address.
777 536 486 1006 760 1006 1230 1391 842 741 200 96 725 686 881 404 1518 366 99 1228 361 290 301 487 173 544 71 1147 993 1179 13 145 144 84 1031 457 812 1183 405