Launched in RFC 2281, HSRP is a Cisco-proprietary protocol where routers are placed to an HSRP router set. Together with dynamic routing protocols along with STP, HSRP is thought to be a high-availability network support, because all three have a nearly instantaneous cutover into a secondary route once the primary route is unavailable.More info https://www.certification-questions.com/
One of those routers will be chosen as the main (“Active”, in HSRP language ), which main will deal with the routing while another routers are at standby, ready to deal with the load when the principal router becomes inaccessible. As it routes IP traffic without relying upon a router, in this manner, HSRP guarantees a network uptime.
The hosts with HSRP for a gateway do not understand the real IP or MAC addresses of the routers in the category. They are communicating using a pseudo router, a “virtual router” made from the HSRP configuration. This router will have IP address and a MAC .
The standby routers are not only going to be sitting there, however! HSRP load balancing can be accomplished, by configuring HSRP groups on a single port.
Before we reach the more innovative HSRP configurationwe get a fundamental one began! We are going to use a two-router topology here, and remember that both these routers may be multilayer switches too. For ease of reading, I will refer to them just as routers.
R2 and R3 are be configured to maintain standby category 5. The virtual router is going to have an IP address of 220.127.116.11 /24. This address should be used by all hosts in VLAN 100 .
We can observe that R3 was chosen as the Active router (“local country is Active”), the virtual router IP is 18.104.22.168, and R2 is the standby router. There are a few HSRP values which you will want to modify from time to time. Imagine if we need R2 are the Active router? Can we alter the router’s MAC address? I will answer those questions!
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