Before we discuss more advanced hsrp concepts, lets create a basic hsrp configuration to get an idea of how this all works. Now lets start the configuration from interface f00 on r1. Hsrp configuration for multiple vlan on cisco 4506. Hsrp hot standby routing protocol packet tracer activity. 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. Cisco router hsrp configuration two examples hsrp hot standby router protocol is the cisco proprietary protocol for providing redundancy in router networks. 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. There can be only a single active and single standby router in a hsrp group. Hsrp hot standby routing protocol is a cisco proprietary protocol to create a virtual gateway ip address between two or more routers. Cisco developed the proprietary hot standby router protocol hsrp to allow multiple.
Hot standby router protocol hsrp is a cisco proprietary first hop redundancy protocol fhrp. Which two statements are true about the hot standby router protocol. Hsrp provides gateway redundancy by sharing ip and mac addresses between redundant gateways. The hsrp standby ip address is a virtual mac address which is composed of 0000. 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. When this router fails, the standby router takes over. Each router has its own ip configured to its lan interface 192.
Version 1 of the protocol was described in rfc 2281 in 1998. Hot standby router protocol hsrp developed by cisco is used to provide layer 3 gateway redundancy. You must configure each gateway in a glbp group with the same group number, and at least one gateway in the read more. For example, we might assign interface vlan 100 to hsrp group 100, and interface vlan 200 to hsrp group 200. Keep in mind that one or both of these routers could be multilayer switches such as a 6509 or 3750 as well. In part 2, you will configure ciscos hot standby routing protocol hsrp, and in part 3 you will configure ciscos gateway load balancing protocol glbp. These hello messages are sent to the multicast address 224.
Well similarly we can have different hsrp groups for different vlans. If your gateway goes down it is a good idea to have a backup that takes over immediately. How do you configure hsrp on a nexus 7000 series switch. Draft hsrp comments and issue papers for new orleans discussion. Hsrp no longer for the weak of heart the ccie journey. Configuring hsrp thehotstandbyrouterprotocolhsrpisafirsthopredundancyprotocolfhrpdesignedtoallow fortransparentfailoverofthefirsthopipdevice. You can have multiple hsrp standby groups on the same interface.
Configuring hsrp group attributes although hsrp can run with no other configuration required, you can configure attributes for the hsrp group, including authentication, priority, preemption and preemption delay, timers, or mac address. Hsrp works by simply configuring one or more routers to be part of hsrp group. Another thing you should check is the mismatched vtp modes. The hot standby routing protocol hsrp is not supported with cisco nonstop. The hold time value is 10 seconds or three times the hello timer. This virtual address is free to move between configured. 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.
For theory, i used cisco configuration guides and the cisco press official certification guide. I mentioned track configuration which can trigger the active router for any of the forwarders to transition to listen state. In order to make the right decision for your network you should know the basics regarding all three. The standby version command is now emulated in catalyst layer 3 switches in cisco packet tracer 7.
Cisco me 3400e ethernet access switch software configuration guide ol1648505. Jun 21, 2010 configure authentication for hsrp, use password vault. This post is part of a series of revision notes i put together and used for studying ccnp switch concepts. Hsrp on the router addressing assigned to the bridge group. This means that hsrp is monitoring the state of interface f10. Routers r1 and r2 have hsrp configured on lan side hsrp ip. Oct 12, 2014 within a basic hsrp configuration, the only way a hsrp switchover occurs is when the heartbeat between the active router and the standby router is broken. A virtual ip is an ip address that is shared for example by a vrrp instance between. The priorities are to set router 1 as the primary for. Introduction to cisco hot standby router protocol hsrp in a lan, if all packets destined to other network segments are forwarded by the same router, when the gateway fails, all the hosts that use the router as the default nexthop fail to communicate with external networks. The only ip address you have to enter in hsrp configuration is the ip address of the virtual router. Hsrp configuration using cisco catalyst 3560 and 3650 switches. Gns3 labs for ccna hsrp configuration and verification. You will then be able to enter your configuration similarly to in ios.
One router will be the active router and is responsible for responding to packets that are sent to the virtual gateway address. Hot standby router protocol, hsrp, is a cisco proprietary protocol to make multiple routers or. Hsrp allows building resiliency in the network gateways wherein should an active router fail in a hsrp group, the standby router assumes the role of the active router and continue routing packets. September 30, 2017 october 12, 2017 by engineer khan. Track interface fastethernet10 state up decrement 10. For example, with the standby preempt delay minimum 30 command, it waits for 30 seconds for the router to become active. Lets get some hands on informationon how this all works. For example, when the east router standby interface fastethernet 01 goes down and then comes back up, east will resume the role of the active router. Migrating from cisco hsrp to industry standard vrrp. We will configure each router with unique physical ip but they must have the same group number and virtual ip.
Configure authentication for hsrp, use password vault. The hot standby router protocol hsrp is a first hop redundancy protocol fhrp designed to allow for transparent failover of the firsthop ip device. Highavailability seamless redundancy in the factory. This means that if the tracked interface of the active. First, be sure that you have enabled hsrp on the device. Well good news, weve done the research for you and provided the stepbystep hot standby router protocol or hsrp configuration below. Any examples, command display output, network topology diagrams, and other figures. Vrrp and varp configuration commands chapter pdf get in touch today. This will allow r2 to take the active role and be the physical gateway of the hosts. Configuring hsrp on nexus os network engineering stack exchange. Hsrp stands for hot standy routing protocol which provides automatic router backup when an active router in the group fails. For this scenario we will use a topology consisting of just two routers. An alternative to hsrp is vrrp virtual router redundancy protocol which is.
In computer networking, the hot standby router protocol hsrp is a cisco proprietary redundancy protocol for establishing a faulttolerant default gateway. 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. September 10, 2010 the hot standby router protocol hsrp is a first hop redundancy protocol fhrp designed to allow for transparent failover of the firsthop ip router. First hop redundancy protocols configuration guide, cisco ios xe. In the above example we have two cisco 65 switches with sup 720 with ios 12. Configure and cable the ethernet interfaces as indicated in the above diagram. May 23, 2014 and also noticed this when the hsrp state was checked. Unless otherwise noted, the term switch refers to a. As you know, hsrp only has 1 active router for a group leaving the other routers in the group not doing anything. This actually takes you into a sub configuration mode as shown below. Configure the virtual ip address of hsrp as default gateway on the host router. Hsrp configuration example for the example in this section, the topology shown in figure 1 is used.
All the clients need access to servers on site b hsrp will provide the clients with uninterrupted access to servers of site b. Hsrp can be configured in the same way in cisco catalyst 3560 and 3650 multilayer switch vlan interfaces using cisco packet tracer. Siwtch a is active state of hsrp and switch b is in standby state. Using ciscos hot standby routing protocol hsrp you can configure a router to be an automatic backup gateway without having to change all of your network clients default gateways, by reconfiguring your dhcp server, and releasing all of the gateway addresses on your network. The standard router redundancy protocol which is used by other vendors is vrrp virtual router redundancy protocol, however cisco has created its own proprietary protocol hsrp which works very well on cisco routers.
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. The following chart provides a quick breakdown of each protocol. Hsrp configuration we want switch sw2 to be active hsrp router for this topology, and the virtual ip address thats we gonna be servicing is 10. C h a p t e r 441 catalyst 3750x and 3560x switch software configuration guide ol2152101 44 configuring hsrp this chapter describes how to use hot standby router protocol hsrp on the catalyst 3750x or 3560x switch to provide routing redundancy for routing ip traffic without being dependent on the availability of any single router.
Hsrp with two routers and two diverse internet circuits. If he puts the priority of both groups on the same router, he wouldnt accomplish load balancing because the other router would. The change will occur even if west is currently the active hsrp router. R1 should be the active router and r2 should be standby. A set of netvisor switches configured as a single virtual entity. Configuration and verification for an hsrp group 36.
Vrrp and varp a virtual ip vip address is an ip address that does not directly connect to a. Hsrp vrrpd glbp standard rfc2281 rfc3768 none load balancing no no yes osi layer3 layer3. Hot standby routing protocol hsrp lab hot standby routing protocol hsrp lab basic objectives. I used two cisco 3560 switches and gns3 to perform my labs. If the interface goes down, then the priority of hsrp will be decreased by 10. In this example, we will use two routers as member of hsrp group. Customer controls service turn up pace, allows full control. So, what we have are pcs connected to a single switch each, using vlans specific to the two geographic areas separate suites in the facility so hsrp is actually pointless. Two diverse internet connections running a bgp failover setup between them.
At a 3 second interval, routers send hsrp hello messages to become aware if the other is up or down between active and standby. Hsrp configuration best cisco ccna ccnp and linuxcentos. By configuring one of the redundancy protocols hsrp, vrrp, glbp we can achieve just that. 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.
The hot standby router protocol hsrp provides network redundancy for ip networks. This address will serve as the default gateway address for all hosts on the lan. Hsrp stands for hot standby router protocol, and what it does is create a virtual ip address which hosts will use as the gateway address. You might just find questions for frame, the functions of this. Within a basic hsrp configuration, the only way a hsrp switchover occurs is when the heartbeat between the active router and the standby router is broken. In this scenario, on site a multiple clients reside on the fast ethernet segment of 198. To accomplish this, r1 is selected as the primary router, and r2 is the secondary router. 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. Hsrp allows building resiliency in the network gateways wherein should an active router fail in a hsrp group, the standby router assumes the. Configuring hsrp thehotstandbyrouterprotocol hsrp isafirsthopredundancyprotocolfhrpdesignedtoallow fortransparentfailoverofthefirsthopipdevice.
We will use the figure below as an example network topology. An example of hsrp misconfiguration is the mismatched of hsrp standby group and standby ip address. 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. Configure the ip addresses on the routers as follows. 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.
Routers r1 and r2 have hsrp configured on lan side hsrp ip 192. This virtual ip will be used by all enddevices as their default gateway. Commonly found at the distribution layer, hsrp uses a virtual ip and mac address which a backup gateway will take control of in the event of failure. I am now writing them up on this website so that they might be useful to others. This means that if a failover occurs upstream bgp peering is lost, the wan circuit fails, etc. Concept notes september 30, 2017 october 12, 2017 by engineer khan this post is part of a series of revision notes i put together and used for studying ccnp switch concepts. Below is an example scenario showing how hsrp can be configured to meet the indirect link failures by use of ip sla configuration with hsrp. In part two, well optimize the design by adding some load balancing. Hsrp overview and basic configuration cisco community. Rtra will be configured as the active hsrp router by setting a higher hsrp priority. Ccna labs hsrp configuration on gns3 and packet tracer.
Ensure you can ping the loopbacks of the isp router from the host router. The host standby router protocol hsrp is a cisco proprietary protocol, as detailed in rfc 2281. I used two asrs, so the config may vary slightly if you use an isr. Hsrp provides high network availability by providing firsthop routing redundancy for ip hosts on networks configured with a default gateway ip address. If you would like to see an example hsrp configuration in a lab, click here. Find answers to hsrp configuration from the expert community at experts exchange.
Jul 06, 2012 hsrp is on the cards today, and im going to break it into two parts. If serial 00 goes down, the router priority will be decremented by the default 10. When the hsrp active routers f10 interface goes down, make sure its no longer the active hsrp router. Hsrp emergency response issue paper draft 25 august. This document provides a sample configuration for hsrp in cisco 6500 series switches for high availability and for vlan redundancy. I know in ios the commands are in the interface configuration, for example.
Two things you should check first are the physical layer connectivity and verify the hsrp configuration. And also noticed this when the hsrp state was checked. Oct 21, 2010 in the world of first hop redundancy, we have plenty of choices. Now weve been working through the theoryand talking about what everything does. After configuration, give a few moment and use the show standby and show standby brief commands on r1 and r2 to verify that hsrp your configuration. Therefore, the configuration to enable hsrp on r1 is as follows. In the world of first hop redundancy, we have plenty of choices.
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