CCNP Certification / BCMSN Examination Tutorial: Getting going With HSRP
Described in RFC 2281, HSRP is usually a Cisco-proprietary protocol during which routers are put into an HSRP router group. Coupled with dynamic routing protocols and STP, HSRP is considered a substantial-availability community company, since all 3 have an Nearly speedy cutover to the secondary route when the main route is unavailable.
One of the routers might be picked as the first (“Energetic”, in HSRP terminology), Which Most important will manage the routing when another routers are in standby, ready to manage the load if the primary router will become unavailable. During this fashion, HSRP guarantees a high network uptime, as it routes IP visitors without the need of relying on just one router.
The hosts applying https://www.washingtonpost.com/newssearch/?query=먹튀검증 HSRP for a gateway don’t know the particular IP or MAC addresses of your routers in the group. They’re speaking using a pseudorouter, a “Digital router” produced with the HSRP configuration. This Digital router should have a virtual MAC and IP adddress at the same time.
The standby routers aren’t just destined to be sitting there, however! By configuring numerous HSRP teams on an individual interface, HSRP load balancing may be realized.
Just before we get to the more State-of-the-art HSRP configuration, we improved get a simple one particular started! We’ll be utilizing a two-router topology listed here, and keep in mind that one particular or both of those of these routers might be multilayer switches likewise. For simplicity of looking at, I’m gonna check with them only as routers.
R2 and R3 will both be configured to become in standby group 5. The Digital router will likely have an IP tackle of 172.twelve.23.ten /24. All hosts in VLAN 100 really should use this tackle as their default gateway.
R2(config)#interface ethernet0
R2(config-if)#standby five ip 172.12.23.10
R3(config)#interface ethernet0
R3(config-if)#standby 5 ip 172.12.23.ten
The display command for HSRP is present standby, and it’s the primary command you ought to run although configuring and troubleshooting HSRP. Let’s operate it on both equally routers and compare outcomes.
R2#demonstrate standby
Ethernet0 – Group five
Regional point out is Standby, priority 100
Hellotime three sec, holdtime 10 sec
Up coming howdy despatched in 0.776
Digital IP deal with is 172.12.23.ten configured
Energetic router is 172.twelve.23.three, precedence 100 expires in 9.568
Standby router is regional
one 먹튀검증 state adjustments, very last point out improve 00:00:22
R3#display standby
Regional state is Lively, priority 100
Upcoming hello despatched in 2.592
Active router is nearby
Standby router is 172.12.23.two expires in 8.020
Digital mac tackle is 0000.0c07.ac05
two point out variations, very last condition change 00:02:08
We can see that R3 is picked because the Lively router (“nearby condition is Energetic”), the Digital router’s IP is 172.12.23.ten, and R2 will be the standby router.
There are numerous HSRP values that you simply’ll need to alter every now and then. Let's say we would like R2 for being the Lively router as an alternative? Can we change the MAC address in the virtual router? I’ll remedy People thoughts in the subsequent part of this HSRP tutorial!