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HSRP Questions 4

November 15th, 2018 in SWITCH 300-115 Go to comments

Question 1

Question 2

Explanation

This HSRP MAC address is a virtual MAC address, 0000.0C07.ACxy, where xy is the HSRP group number in hexadecimal based on the respective interface. 25 in hexadecimal is 37 in decimal.

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Comments
  1. trueteller
    December 28th, 2018

    Q7
    I have checked this in GNS3.
    A is correct. However I can’t agree with E.
    There is a mistake in configuration of IP address. When VIP is not in the same subnet as interface address the state of HSRP is INIT on SW2.

    SW2#show standby
    Vlan1 – Group 20
    State is Init (virtual IP has invalid subnet)
    Virtual IP address is 192.168.250.1 (wrong subnet for this interface)
    Active virtual MAC address is 0000.0c07.ac14 (MAC Not In Use)
    Local virtual MAC address is 0000.0c07.ac14 (v1 default)
    Hello time 3 sec, hold time 10 sec
    Preemption disabled
    Active router is 192.168.250.2, priority 120 (expires in 10.656 sec)
    Standby router is unknown
    Priority 110 (configured 110)
    Group name is “hsrp-Vl1-20” (default)

    It acknowledges SW1 as an active because it receives the traffic destined for multicast group 224.0.0.2. However SW1 doesn’t recognize it standby state at SW2 doesn’t proceed with it beyond INIT state. I have checked version 2 of HSRP. Still the same result.
    I guess there is a misconfiguration of SW2 interface address. No other answer is valid with current config. If the configuration of SW2 interface was correct (192.168.250.3), the answer E would be correct.

  2. faze
    March 15th, 2019

    Hi, can someone please explain Q4? wouldn’t the answer be a misconfig?

  3. Network_Monkey
    March 19th, 2019

    Hi @faze,

    Yes you are right.
    In other certprepare Qs, it is misconfig.
    I think it needs to be double checked.

    Thanks

  4. Q4
    March 24th, 2019

    @faze
    read somewhere that you need to look at the actual error log
    if same virtual mac = l2 loop
    if diff virtual mac = hsrp misconfig

  5. UncleJ
    April 19th, 2019

    What about Q1?
    All groups? All HSRP groups in the router? Each HSRP group has their own same VIP and virtual MAC, isn’t it?

    Can anyone clear up this question?

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