An interface begins in an initial state when first configured with hsrp, or taken out of an. Now weve been working through the theoryand talking about what everything does. In this example, routers r1, r2, and r3 are vrrp routers that together form a virtual router or vrrp group. Hsrp will provide the clients with uninterrupted access to servers of site b. A single router elected from the group is responsible for forwarding the packets that hosts send to. Hot standby routing protocol hsrp lab hot standby routing protocol hsrp lab basic objectives. Hsrp configuration using cisco catalyst 3560 and 3650 switches hsrp can be configured in the same way in cisco catalyst 3560 and 3650 multilayer switch vlan interfaces using cisco packet tracer. Configure the priority for the desired active router to be greater than 100. A hsrpv2 packet uses the typelengthvalue tlv format and has a 6byte identifier field with the mac address of the physical router that sent the packet. To configure the priority of a router from its default of 100. Vrrp configuration best cisco ccna ccnp and linuxcentos. This virtual ip will be used by all enddevices as their default gateway. Rtra will be configured as the active hsrp router by setting a higher hsrp priority.
Now we could have more routers participating in the overall hsrp group were creating but they would have to wait on the sidelines. The hosts that use the hsrp address as a gateway never know the actual physical ip or mac address of the routers in the group. Hot standby router protocol, hsrp, is a cisco proprietary protocol to make multiple routers or. Cisco proprietary protocol defined on rfc 2281 informational type vrrp virtual router redundancy protocol. We will use the figure below as an example network topology. Below the n7k hsrp configurations the vpc configuration is omitted. Hsrp does support group number of 0 we do check it and in fact, it is the default group number if you dont enter group number in the configuration so hsrp version 1 supports up to 256 group numbers. When this router fails, the standby router takes over. Oct 29, 2008 the hot standby router protocol hsrp is a cisco proprietary firsthop redundancy protocol fhrp designed to allow for transparent failover of the firsthop ip router, and has been described in detail in rfc 2281. Aug 16, 2016 hsrp configure on cisco router default, hsrp configuration on cisco router, hsrp configuration on cisco router pdf, hsrp configuration on cisco router example, hsrp configuration on cisco router. Now lets start the configuration from interface f00 on r1. Hsrp hot standby router protocol linkedin slideshare.
Verify the values for hsrp role, group, virtual ip address of the gateway, preemption, and priority. These are hot standby router protocol hsrp, virtual router redundancy protocol vrrp and gateway load balancing protocol glbp. We will configure each router with unique physical ip but they must have the same group number and virtual ip. Hsrp provides gateway redundancy by sharing ip and mac addresses between redundant gateways. Ccna labs hsrp configuration on gns3 and packet tracer. Each router has its own ip configured to its lan interface 192. Hsrp configuration for multiple vlan on cisco 4506. Hsrp configuration example for the example in this section, the topology shown in figure 1 is used. Hsrp basic configuration hsrp is configured on the interface that is accepting traffic from hosts. Configuring hsrp in cisco 6500 switches this document provides a sample configuration for hsrp in cisco 6500 series switches for high availability and for vlan redundancy. Siwtch a is active state of hsrp and switch b is in standby state. The protocol consists of virtual mac and ip addresses that are shared between two or more routers that belong to the same hsrp read more. Oct 22, 20 the video is a reference to hsrp cisco proprietary protocol which can be used to create standby paths for routing to a single network using multiple routable paths. If router a is the hsrp active router and then loses a link, which causes it to become standby router, and then the link comes back, the delay command causes router a to wait before it becomes active again.
In this blog i will discuss the configuration of hot standby router protocol hsrp. Verify hsrp by issuing the show standby command on r1 and r3. Hot standby router protocol hsrp is a cisco proprietary first hop redundancy protocol fhrp. See the configuring mhsrp section on page 4010 for the example configuration steps. Hsrp works by simply configuring one or more routers to be part of hsrp group. The hold time value is 10 seconds or three times the hello timer. Hsrp v2 is now supported through the standby version 2 ios command. This set is known as an hsrp group or a standby group. The standby version command is now emulated in catalyst layer 3 switches in cisco packet tracer 7. In computer networking, the hot standby router protocol hsrp is a cisco proprietary redundancy protocol for establishing a faulttolerant default gateway. Hot standby router protocol hsrp configuration pearson. Configure the active router to preempt the standby router in cases where the active router comes. How to configure hsrp on cisco router step by step youtube. Because hosts are configured with their default router as the hsrp virtual ip.
Note that hsrp also identifies the active and standby router ip addresses for the group. One of the routers will act as primary active router while the other as secondary standby router. By configuring one of the redundancy protocols hsrp, vrrp, glbp we can achieve just that. Recall that the interface with the highest priority is elected the active router. In particular, the protocol protects against the failure of the first hop router when the source host cannot learn. The protocol establishes an association between gateways in order to achieve default gateway failover if the primary gateway becomes. Note that only the commands specific to hsrp are shown in this example. Typical hsrp configuration hsrp versions the switch. Hsrp overview and basic configuration cisco community. Earning the cisco ccna routing and switching certification is a testament to your understanding of networking technologies.
This protocol is ciscoproprietary, but there is also a flavor for noncisco shops vrrp. Use the show standby brief command on r1 and r3 to view an hsrp status summary. Their functionality is virtually the same but feel free to investigate this option if it is better for your situation. Jun 26, 2017 there you can see another hsrp example above. And lets take a look at how you would configurea very basic configuration of hsrp with,if you look in the upper right hand side,those two routers in our. Building on top of the hsrp concept notes i posted previously, here we will demonstrate a practical example of how hsrp is configured and how it works lets begin. Jul 16, 2019 hsrp configuration using cisco catalyst 3560 and 3650 switches hsrp can be configured in the same way in cisco catalyst 3560 and 3650 multilayer switch vlan interfaces using cisco packet tracer.
Very simple hsrp configuration hot standby router protocol. To provide redundancy, you also need to track the serial interfaces. Implementing high availability with hsrp ciscozine. If an interface running hsrpv1 gets an hsrpv2 packet, the. These hello messages are sent to the multicast address 224. Lets take a look how to setup vrrp using this topology. It is a layer 3 protocol of the osi model, developed by cisco to provide redundancy at this level and at the gateway, between two or more cisco devices hsrp uses a virtual mac and ip address, which used in the event. You can have multiple hsrp standby groups on the same interface. Hsrp hot standby router protocol hot standby router protocol hsrp is a cisco proprietary redundancy protocol for establishing a fault tolerant default gateway, and has been described in detail in rfc 2281. Rfc 2281 cisco hsrp march 1998 using hsrp, a set of routers work in concert to present the illusion of a single virtual router to the hosts on the lan.
Version 1 of the protocol was described in rfc 2281 in 1998. For example, we might assign interface vlan 100 to hsrp group 100, and interface vlan 200 to hsrp group 200. To accomplish this, r1 is selected as the primary router, and r2 is the secondary router. The hot standby router protocol hsrp is a cisco proprietary firsthop redundancy protocol fhrp designed to allow for transparent failover of the firsthop ip router, and has been described in detail in rfc 2281. So with hsrp, short for hot standby router protocol, we are going to have two routers. Ill demonstrate one issue but the methodology to troubleshoot it can be used for a variety of hsrp issues. Configure and cable the ethernet interfaces as indicated in the above diagram. Introduction the hot standby router protocol, hsrp, provides a mechanism which is designed to support nondisruptive failover of ip traffic in certain circumstances. How to configure gateway redundancy with hsrp in ios. 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.
The hot standby router protocol, hsrp, provides a mechanism which is designed to support nondisruptive failover of ip traffic in certain circumstances. For theory, i used cisco configuration guides and the cisco press official certification guide. This address will serve as the default gateway address for all hosts on the lan. This is gonna be very similar with hsrp configuration. The host standby router protocol hsrp is a cisco proprietary protocol, as detailed in rfc 2281.
In this course, explore the infrastructure services offered by cisco, and prepare for the infrastructure services portion of the interconnecting cisco networking devices part 2 icnd2 examone of two qualifying exams for the ccna routing and switching certification. Hot standby router protocol hsrp one picture summary. Pdf hsrp hot standby router protocol jignesh patel. In this example well take a look at troubleshooting hsrp. 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. You must configure each gateway in a glbp group with the same group number, and at least one gateway in the read more.
Hsrp configuration best cisco ccna ccnp and linuxcentos. Then we can have 1 switch the active router for the hsrp group 100, and the other switch which would be active router for a hsrp group 200. Default hsrp configuration, page 15 hsrp configuration guidelines, page 15 enabling hsrp, page 16 configuring hsrp priority, page 17 121235 active router for group 1 standby router for group 2 client 1 router a router b 10. For example, when the east router standby interface fastethernet 01 goes. What is the ip address and priority of the standby router. Figure 51 shows the network topology for the configuration that follows, which shows how to configure hsrp using the commands covered in this chapter. Aug 10, 20 you can also check the configuration, it can show the current configuration using the command show runningconfig for example router 2. Lets get some hands on informationon how this all works.
Well similarly we can have different hsrp groups for different vlans. Hot standbyroutingprotocol virtualrouterredundancyprotocol. So our main focus here is just the active and the standby. The video is a reference to hsrp cisco proprietary protocol which can be used to create standby paths for routing to a single network using multiple routable paths. Hsrp configuration hsrp configuration commands step 1. 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. For example, with the standby preempt delay minimum 30 command, it waits for 30 seconds for the router to become active. In the above example we have two cisco 65 switches with sup 720 with ios 12. This document provides a sample configuration for hsrp in cisco 6500 series switches for high availability and for vlan redundancy.
Hsrp provides high network availability by providing firsthop routing redundancy for ip hosts on ethernet, fiber distributed data interface fddi, bridgegroup. Suppose to have 1 nexus5k ciscozinel2 conntected to 2 nexus7k ciscozinel3pri and ciscozinel3bkp. Hsrp allows you to configure two or more routers as standby routers and only a single router as active router at a time. 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. One router will be the active router and is responsible for responding to packets that are sent to the virtual gateway address. 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. In particular, the protocol protects against the failure of the first hop router when the source host cannot learn the ip address of the first hop router dynamically. If your gateway goes down it is a good idea to have a backup that takes over immediately. In hsrp, two or more routers gives an illusion of a virtual router.
Hot standby router protocol hsrp is a cisco proprietary protocol, which provides redundancy for a local subnet. Ios commands available in the cisco packet tracer and a sample configuration using two cisco 3560 layer 3 switches. Ccna training hot standby router protocol hsrp tutorial. Hsrp hot standby routing protocol packet tracer activity. The hot standby router protocol hsrp provides network redundancy for ip networks.
An alternative to hsrp is vrrp virtual router redundancy protocol which is. In this example, we will use two routers as member of hsrp group. Configure hot standby router protocol hsrp on a pair of routers to provide. Configure the ip addresses on the routers as follows. Figure 192 shows an example of a loadsharing hsrp ipv4 configuration. The ip address of the virtual router is the same as that configured on the ethernet interface of r1 192. An hsrp priority of 150 is configured with the standby priority command and hsrp is configured to track the state of interface serial0. Only the virtual ip address that was created within the hsrp configuration along with a virtual mac address is known to other hosts on the network. At a 3 second interval, routers send hsrp hello messages to become aware if the other is up or down between active and standby. Cisco hsrp configuration with example icnd2 200105. Hsrp hot standby router protocol explained networkel. I used two cisco 3560 switches and gns3 to perform my labs. Hsrp hot standby routing protocol is a cisco proprietary protocol to create a virtual gateway ip address between two or more routers.
This means that if the tracked interface of the active. Configuring hsrp these sections contain this configuration information. 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. Fastethernet 023 is connected to the local area network.