CCNP Certification / BCMSN Examination Tutorial: Getting Started With HSRP
Defined in RFC 2281, HSRP is usually a Cisco-proprietary protocol in which routers are place into an HSRP router team. Together with dynamic routing protocols and STP, HSRP is taken into 토토사이트 account a significant-availability network support, considering the fact that all a few have an almost instant cutover to the secondary path when the first path is unavailable.
Among the routers will likely be chosen as the primary (“Energetic”, in HSRP terminology), and that primary will manage the routing although one other routers are in standby, Completely ready to handle the load if the key router turns into unavailable. In this vogue, HSRP assures a significant community uptime, as it routes IP traffic with no depending on only one router.
The hosts making use of HSRP as a gateway don’t know the particular IP or MAC addresses from the routers in the group. They’re speaking which has a pseudorouter, a “virtual router” made with the HSRP configuration. This Digital router will likely have a virtual MAC and IP adddress also.
The standby routers aren’t just destined to be sitting there, even though! By configuring many HSRP teams on a single interface, http://edition.cnn.com/search/?text=먹튀검증 HSRP load balancing may be realized.
Just before we reach the more State-of-the-art HSRP configuration, we better get yourself a basic 1 started off! We’ll be utilizing a two-router topology listed here, and Understand that one particular or both equally of such routers might be multilayer switches also. For relieve of examining, I’m going to check with them only as routers.
R2 and R3 will both of those be configured to become in standby team 5. The virtual router should have an IP deal with of 172.twelve.23.ten /24. All hosts in VLAN 100 should really use this address as their default gateway.
R2(config)#interface ethernet0
R2(config-if)#standby 5 ip 172.12.23.ten
R3(config)#interface ethernet0
R3(config-if)#standby five ip 172.twelve.23.ten
The present command for HSRP is clearly show standby, and it’s the primary command it is best to run whilst configuring and troubleshooting HSRP. Permit’s operate it on both of those routers and Examine outcomes.
R2#demonstrate standby
Ethernet0 – Group 5
Local point out is Standby, precedence one hundred
Hellotime 3 sec, holdtime 10 sec
Following hi despatched in 0.776
Digital IP address is 172.12.23.ten configured
Energetic router is 172.12.23.three, priority one hundred expires in nine.568
Standby router is local
one state adjustments, last point out transform 00:00:22
R3#exhibit standby
Community point out is Lively, priority 100
Future hello there sent in two.592
Energetic router is local
Standby router is 172.twelve.23.2 expires in 8.020
Digital mac address is 0000.0c07.ac05
two point out variations, very last state modify 00:02:08
We are able to see that R3 continues to be picked given that the Lively router (“regional point out is Energetic”), the virtual router’s IP is 172.twelve.23.ten, and R2 could be the standby router.
Usually there are some HSRP values that you just’ll have to have to change once in a while. Let's say we wish R2 to become the Lively router in its place? Can we change the MAC handle on the Digital router? I’ll respond to those queries in the following section of this HSRP tutorial!