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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?

  6. Abdullah
    September 10th, 2019

    Q9
    In HSRP and VRRP, only the primary router is used to forward traffic, others routers must wait for the primary one down before they are used. Also, the bandwidth of the standby (and other) routers are not used and wasted. With GLBP, up to four gateways can be used simultaneously. There is still one virtual IP address in a group, but GLBP can automatically select which router in the group to forward traffic by sending the virtual MAC address of a selected router to that host.

    Question 2

    Which two statements are true about HSRP, VRRP, and GLBP? (Choose two)

    A. GLBP and VRRP allow for MD5 authentication, whereas HSRP does not.
    B. HSRP allows for multiple upstream active links being simultaneously used, whereas GLBP does not.
    C. GLBP allows for router load balancing of traffic from a network segment without the different host IP configurations required to achieve the same results with HSRP.
    D. Unlike HSRP and VRRP, GLBP allows automatic selection and simultaneous use of multiple available gateways.
    E. GLBP allows for router load balancing of traffic from a network segment by utilizing the creation of multiple standby groups.

  7. Abdullah
    September 10th, 2019

    Answer: C D

  8. Dmytro
    September 15th, 2019

    About Q4, a very similar question was in section “HSRP Questions” (without number) Q7, and answer was misconfigure.

  9. Rothgar
    September 26th, 2019

    Don’t Q8 and Q9 conflict? Does Q8 mean to say “GLBP can share multiple MAC for gateway load balancing?”

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