To acquire your CCNP authorisation and transfer the BCMSN exam, you've got to undergo what HSRP does and the some configurable options. While the activeness of HSRP is quite ultimate (and awninged in a preceding tutorial), you also requirement to undergo how HSRP arrives at the MAC come for the realistic router - as substantially as how to configure a newborn MAC for this realistic router. This puts us in the extraordinary function of creating a fleshly come for a router that doesn't exist!
The production of exhibit histrion for a two-router HSRP plan is shown below.
R2#show standby
Ethernet0 - Group 5
Local land is Standby, antecedency 100
Hellotime 3 sec, holdtime 10 sec
Next greeting dispatched in 0.776
Virtual IP come is 172.12.23.10 configured
Active router is 172.12.23.3, antecedency 100 expires in 9.568
Standby router is local
1 land changes, terminal land modify 00:00:22
R3#show standby
Ethernet0 - Group 5
Local land is Active, antecedency 100
Hellotime 3 sec, holdtime 10 sec
Next greeting dispatched in 2.592
Virtual IP come is 172.12.23.10 configured
Active router is local
Standby router is 172.12.23.2 expires in 8.020
Virtual mac come is 0000.0c07.ac05
2 land changes, terminal land modify 00:02:08
R3 is in Active state, patch R2 is in Standby. The hosts are using the 172.12.123.10 come as their gateway, but R3 is actually direction the workload. R2 module verify over if R3 becomes unavailable.
An IP come was appointed to the realistic router during the HSRP plan process, but not a MAC address. However, there is a MAC come low the exhibit histrion production on R3, the astir router. How did the HSRP impact come at a MAC of 00-00-0c-07-ac-05?
Well, most of the impact is already finished before the plan is modify begun. The MAC come 00-00-0c-07-ac-xx is distant for HSRP, and xx is the assemble sort in hexadecimal. That's a beatific power to hit for the exam, so attain trusty you're easy with glamour conversions. The assemble sort is 5, which is spoken as 05 with a two-bit glamour character. If the assemble sort had been 17, we'd wager 11 at the modify of the MAC come - digit organisation of 16, digit organisation of 1.
The production of the exhibit histrion bidding also tells us that the HSRP speakers are sending Hellos every 3 seconds, with a 10-second holdtime. These values crapper be denaturized with the histrion command, but HSRP speakers in the aforementioned assemble should hit the aforementioned timers. You crapper modify bond downbound the greeting instance to the millisecond, but it's questionable you'll ever requirement to do that.
R3(config-if)#standby 5 timers ?
Hello quantity in seconds
msec Specify greeting quantity in milliseconds
R3(config-if)#standby 5 timers 4 ?
Hold instance in seconds
R3(config-if)#standby 5 timers 4 12
Another essential HSRP power is lettered how to modify the Active router assignment. I'll exhibit you how to do that, and how to configure HSRP programme tracking, in the incoming conception of my CCNP / BCMSN communicating tutorial!
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