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300-115 question 13 discussion

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Download Free Cisco 300-115 Exam Questions

Ferris Plastics, Inc. is a medium sized company, with an enterprise network (access,
distribution and core switches) that provides LAN connectivity from user PCs to corporate
servers. The distribution switches are configured to use HSRP to provide a high availability
solution.
DSW1 -primary device for VLAN 101 VLAN 102 and VLAN 105
DSW2 - primary device for VLAN 103 and VLAN 104
A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to
release its status as the primary device, unless GigabitEthernet1/0/1 on backup device has
also failed.
Troubleshooting has identified several issues. Currently all interfaces are up. Using the
running configurations and show commands, you have been asked to investigate and
respond to the following question.



During routine maintenance, it became necessary to shut down the GigabitEthernet1/0/1
interface on DSW1 and DSW2. All other interfaces were up. During this time, DSW1
became the active router for the VLAN 104HSRP group. As related to the VLAN 104HSRP
group, what can to be done to make the group function properly?

  • A On DSW1, disable preempt.
  • B On DSW2 decrease the priority value to a value less than 150.
  • C On DSW1, increase the decrement value in the track command to a value greater than 6.
  • D On DSW1, decrease the decrement value in the track command to a value less than 1.
  • Nov 9, 2017, 07:32 PM

DSW1> sho standby; DSW1> sho run; DSW2> sho standby; DSW2> sho run; Answer C

  • Oct 27, 2017, 08:52 PM

On the first sight this is hard to follow without actual configuration, but it becomes more clear after some logical consideration. In the question itself we have a condition that "DSW2 - primary device for VLAN 103 and VLAN 104 A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device, unless GigabitEthernet1/0/1 on backup device has also failed.". That means that when GigabitEthemet1/0/1 fails on DSW2 we switch to DSW1. When GigabitEthemet1/0/1 fails on DSW1 and GigabitEthemet1/0/1 reamins failed on DSW2 we have to switch back to DSW2. In other words when both switches have GigabitEthemet1/0/1 down switch DSW2 should have better priority. I assume we are tracking GigabitEthemet1/0/1 intefaces on both switches and decrement priority when this interface is down. In order DSW2 to be the primary we need to decrement priority on DSW1 MORE than on DSW2. That is exactly why the answer to "increase the decrement value in the track command on DSW1" is the right answer. All other answers simply do not fit into this goal.

  • Oct 17, 2017, 02:01 PM

"Why is this even considered a problem to fix? The access switches have resilient up-links to the distribution switches. The failure of a single link is exactly the scenario this design would have been implemented for. No need to do anything as far as I can see, it should all be working." Spot on.

  • Sep 28, 2017, 02:34 PM

Don't have access to configuration to confirm, but why is this even considered a problem to fix? The access switches have resilient uplinks to the distribution switches. The failure of a single link is exactly the scenario this design would have been implemented for. No need to do anything as far as I can see, it should all be working.

  • Sep 11, 2017, 08:05 AM

where is the configuration on switches??

  • Jul 26, 2017, 08:23 AM

On DSW1, increase the decrement value in the track command to a value greater than 6.

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