CCNP Certification / BCMSN Test Tutorial: 먹튀검증 Getting going With HSRP
Defined in RFC 2281, HSRP is really a Cisco-proprietary protocol through which routers are put into an HSRP router team. As well as dynamic routing protocols and STP, HSRP is taken into account a higher-availability network support, due to the fact all 3 have an almost speedy cutover into a secondary path when the key route is unavailable.
Among the routers will probably be selected as the key (“Lively”, in HSRP terminology), Which primary will deal with the routing when the opposite routers are in standby, ready to manage the load if the main router turns into unavailable. In this particular trend, HSRP guarantees a superior network uptime, because it routes IP website traffic without the need of counting on one router.
The hosts employing HSRP to be a gateway don’t know the particular IP or MAC addresses in the routers in the group. They’re speaking with a pseudorouter, a “virtual router” created by the HSRP configuration. This Digital router could have a virtual MAC and IP adddress also.
The standby routers aren’t just going to be sitting there, however! By configuring various HSRP groups on just one interface, HSRP load balancing could be accomplished.
Prior to we reach the greater Innovative HSRP configuration, we greater receive a basic 1 started out! We’ll be utilizing a two-router topology listed here, and keep in mind that one or equally of those routers could be multilayer switches too. For ease of examining, I’m going to refer to them only as routers.
R2 and R3 will the two be configured to generally be in standby team five. The Digital router may have an IP deal with of 172.12.23.ten /24. All hosts in VLAN one hundred must use this address 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 five ip 172.twelve.23.ten
The display command for HSRP is present standby, and it’s the main command you must run while configuring and troubleshooting HSRP. Let’s run it on the two routers and Review benefits.
R2#present standby
Ethernet0 – Group 5
Neighborhood state is Standby, precedence a hundred
Hellotime three sec, holdtime ten sec
Future hi despatched in 0.776
Virtual IP deal with is 172.12.23.10 configured
Active router is 172.12.23.3, precedence one hundred expires in nine.568
Standby router is local
one point out changes, very last point out transform 00:00:22
R3#exhibit standby
Neighborhood point out is Energetic, precedence one hundred
Subsequent hello despatched in two.592
Energetic router is community
Standby router is 172.twelve.23.2 expires in 8.020
Digital mac deal with is 0000.0c07.ac05
two state improvements, past state change 00:02:08
We are able to see that R3 has long been selected since the Active router (“regional condition is Active”), the virtual router’s IP is 172.12.23.ten, and R2 could be the standby router.
There are many HSRP values that you choose to’ll require to alter occasionally. What if we wish R2 for being the Energetic router as an alternative? Can we change the MAC tackle with the virtual router? I’ll respond to These concerns in the subsequent part of the HSRP tutorial!