HSRP Questions

Hello

For Q5 I think the correct answer it’s D not C

Do I’m right?

Best Regards

in Q5 what is a shared virtual IMC?

@9tut
Hi, I think there’s a typo in one of Q4’s answers. Instead of “IP address” it says “P address”.

Hi. I think in Q5 the correct answer is C

Question 1

Which command must you enter to guarantee that an HSRP router with higher priority becomes the HSRP primary router after it is reloaded?
A. standby 10 preempt
B. standby 10 version 1
C. standby 10 priority 150
D. standby 10 version 2

Where is this information presented? Is this on Cisco.com website? Or is the expectation that we are to get a supplemetal textbook in conjunction with this paid membership to get all of the information?

It’s strange to see a question that asks about a command that is not explained anywhere on this website.

Quick summarization:

+ HSRP is Cisco proprietary which allows several routers or multilayer switches to appear as a single gateway IP address.
+ HSRP has 6 states: Initial, learn, listen, speak, standby and active.
+ HSRP allows multiple routers to share a virtual IP and MAC address so that the end-user hosts do not realize when a failure occurs.
+ The active (or Master) router uses the virtual IP and MAC addresses.
+ Standby routers listen for Hellos from the Active router. A hello packet is sent every 3 seconds by default. The hold time (dead interval) is 10 seconds.
+ HSRP version 1 uses the MAC address range 0000.0C07.ACxx while HSRP version 2 uses the MAC address range 0000.0C9F.Fxxx , where xxx is the hexadecimal number of HSRP group.
+ The group numbers of HSRP version 1 range from 0 to 255. HSRP does support group number of 0 (we do check it and in fact, it is the default group number if you don’t enter group number in the configuration) so HSRP version 1 supports up to 256 group numbers. HSRP version 2 supports 4096 group numbers.

If we needed to know about the “preempt” command. Then why not just mention that in the HSRP quick summary tutorial that you provided?

switch# show hsrp
Vlan1 – Group 1 (HSRP-V1) (IPv4)
Local state is Active, priority 150 (Cfged 150), may preempt
Forwarding threshold(for vPC), lower: 1 upper: 150
Preemption Delay (Seconds) Reload:300
Hellotime 3 sec, holdtime 10 sec
Next hello sent in 0.793000 sec(s)
Virtual IP address is 10.1.1.3 (Cfged)
Active router is local
Standby router is unknown
Authentication text “cisco”
Virtual mac address is 0000.0c07.ac01 (Default MAC)
17 state changes, last state change 1w0d
IP redundancy name is hsrp-Vlan1-1 (default

Where is this information located?

Question 3

Which MAC address is recognized as a VRRP virtual address?
A. 0000.5E00.010a
B. 0005.3711.0975
C. 0000.0C07.AC99
D. 0007.C070.AB01

Answer: A

Explanation

With VRRP, the virtual router’s MAC address is 0000.5E00.01xx , in which xx is the VRRP group

Thanks.

@9tut
According to Cisco
Q3

HSRP Addressing
In most cases when you configure routers to be part of an HSRP group, they listen for the HSRP MAC address for that group as well as their own burned-in MAC address. The exception is routers whose Ethernet controllers only recognize a single MAC address (for example, the Lance controller on the Cisco 2500 and Cisco 4500 routers). These routers use the HSRP MAC address when they are the Active router and their burned-in address when they are not.

HSRP uses this MAC address on all media except Token Ring:

0000.0c07.ac** (where ** is the HSRP group number)

https://www.cisco.com/c/en/us/support/docs/ip/hot-standby-router-protocol-hsrp/9234-hsrpguidetoc.html#toc-hId–879789615