CCNP Certification / BCMSN Examination Tutorial: Getting Started With HSRP
Defined in RFC 2281, HSRP can be a Cisco-proprietary protocol wherein routers are put into an HSRP router group. In addition to dynamic routing protocols and STP, HSRP is taken into account a significant-availability network service, since all a few have an Nearly fast cutover to your secondary path when the main path is unavailable.
Among the list of routers will be picked as the key (“Energetic”, in HSRP terminology), Which Major will tackle the routing while another routers are in standby, Completely ready to deal with the load if the principal router turns into unavailable. 먹튀사이트 In this manner, HSRP guarantees a substantial network uptime, since it routes IP traffic without having depending on just one router.
The hosts working with HSRP being a gateway don’t know the actual IP or MAC addresses in the routers while in the group. They’re speaking which has a pseudorouter, a “Digital router” produced because of the HSRP configuration. This virtual router could have a virtual MAC and IP adddress as well.
The standby routers aren’t just going to be sitting down there, though! By configuring several HSRP groups on one interface, HSRP load balancing is often reached.
Ahead of we reach the more Superior HSRP configuration, we better get a essential 1 began! We’ll be utilizing a two-router topology right here, and Remember the fact that just one or equally of these routers could possibly be multilayer switches in addition. For simplicity of reading, I’m planning to refer to them only as routers.
R2 and R3 will equally be configured being in standby group five. The virtual router will have an IP tackle of 172.twelve.23.10 /24. All hosts in VLAN one hundred really should use this handle as their default gateway.
R2(config)#interface ethernet0
R2(config-if)#standby five ip 172.twelve.23.ten
R3(config)#interface ethernet0
R3(config-if)#standby 5 ip 172.twelve.23.ten
The clearly show command for HSRP is clearly show standby, and it’s the first command you ought to run whilst configuring and troubleshooting HSRP. Allow’s run it on equally routers and Assess effects.
R2#present standby
Ethernet0 – Team five
Neighborhood condition is Standby, priority 100
Hellotime 3 sec, holdtime ten sec
Upcoming good day sent in 0.776
Virtual IP deal with is 172.twelve.23.ten configured
Lively router is 172.twelve.23.three, precedence 100 expires in 9.568
Standby router is community
1 condition changes, last point out change 00:00:22
R3#present standby
Local condition is Active, priority one hundred
Upcoming hello despatched in two.592
Lively router is neighborhood
Standby router is 172.12.23.2 expires in eight.020
Digital mac tackle is 0000.0c07.ac05
two state changes, very last condition modify 00:02:08
We could see that https://en.search.wordpress.com/?src=organic&q=먹튀검증 R3 has been chosen because the Active router (“neighborhood state is Energetic”), the Digital router’s IP is 172.12.23.ten, and R2 will be the standby router.
There are numerous HSRP values which you’ll require to vary once in a while. What if we would like R2 for being the Active router in its place? Can we change the MAC address of the Digital router? I’ll reply All those concerns in another portion of this HSRP tutorial!