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September 18th, 2017 in SWITCH 300-115 Go to comments

Question 1


The command “mac address-table aging-time 180” specifies the time before an entry ages out and is discarded from the MAC address table. The default is 300 seconds. Entering the value 0 disables the MAC aging.

Question 2

Question 3


The switch learns which port the host is attaching by examining the source MAC address in frames received on a port. For example switch receives a frame with source MAC of 0000.0000.aaaa (abbreviated as “aaaa”) on port Fa0/1, it populates its MAC address-table with an entry like this “host aaaa on Fa0/1”. If the switch receives a frame with the same “aaaa” MAC from Fa0/2 then there will be a flap and the switch will log something like this:

%MAC_MOVE-SP-4-NOTIF: Host 0000.0000.aaaa in vlan 1 is flapping between port 0/1 and port 0/2

This flapping phenomenon may be the result of a Layer loop somewhere in your network, especially when STP is disabled for some reasons.

If you don’t want to see this message then issue the “no mac-address-table notification mac-move” or place a static entry with the “mac-address-table static 000.0000.aaaa vlan 1 interface fa0/1″on the switch. The command “mac-address-table notification mac-move” is disabled by default on 6500 & 7600 series but enabled by default on other series.

Question 4


The command “show mac address-table” displays the MAC address table along with the port associated for the switch. The ‘show mac address-table address ” gives a more specific view of a specific MAC address.

Question 5

Question 6

Question 7

Question 8


If an access port receives a tagged packet (Inter-Switch Link [ISL] or IEEE 802.1Q tagged), the packet is dropped, and the source address is not learned.

Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12-2_55_se/configuration/guide/3750xscg/swint.html

Question 9

Question 10


The Portfast feature can be configured on both access or trunk port. This feature instructs the port to skip listening and learning state and move to forwarding state immediately.

The voice VLAN feature enables access ports to carry IP voice traffic from an IP phone. The simple example below shows how to configure voice VLAN on an interface:

interface fastethernet0/1
switchport access vlan 10
switchport voice vlan 20

Note: This is not a trunk port (although two VLANs are configured on an interface). Cisco calls this a Multi-Vlan access port.

Question 11


An IP phone contains an integrated three-port 10/100 switch. The ports, which are dedicated connections, are described as follows:
* Port 1 connects to the Catalyst series switch or other device that supports Voice-over-IP (VoIP).
* Port 2 is an internal 10/100 interface that carries the phone traffic.
* Port 3 connects to a PC or other device.


To enhance the quality of the VoIP traffic, port 2 and port 3 are often placed in two different VLANs. The VLAN carries voice traffic to and from the IP Phone is often called auxiliary VLAN (Port 2 in this case) while the VLAN carries data traffic is often the native VLAN (Port 3 in this case).

In the picture below the auxiliary VLAN is VLAN 30 while the native VLAN is VLAN 20. To use the IP Phone these two VLANs will need to be configured on the switch.


To learn how to configure auxiliary VLAN please read: http://www.cisco.com/en/US/docs/switches/lan/catalyst4000/8.1/configuration/guide/vlans.html#wp1048863.

To learn how to configure voice and data VLAN please read: http://www.cisco.com/en/US/products/hw/switches/ps4324/products_configuration_example09186a0080722cdb.shtml.

Comment pages
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  1. Samuelity
    July 30th, 2017

    Dear all, I need latest dumps for 300-115 switch, email samuelityz (at) gmail (dot) com

  2. engineerarea
    August 22nd, 2017

    I wonder what all the people here are asking for these materials.

  3. Muhammad Waqar
    August 26th, 2017

    Dear any one please share latest dumps for 300-115 switch
    My Email {email not allowed}

  4. Anonymous
    September 10th, 2017

    can anyone put the link for the questions ?

  5. Anonymous
    September 11th, 2017

    Where are question number 11 and 12? There are not in the SWITCH_Jul_2017 pdf.

  6. rockercya
    September 12th, 2017

    hi Guys

    how to view these questions?

  7. Ross
    September 24th, 2017

    Hi, I downloaded SWITCH_Jul_2017 pdf but it seems corrupted. Does someone has correct version? Thank you

  8. Sam
    November 14th, 2017

    Dear any one please share latest dumps for 300-115 switch
    My Email {email not allowed}

  9. Sam
    November 14th, 2017

    Dear all, I need latest dumps for 300-115 switch, email {email not allowed}

  10. Sam
    November 14th, 2017

    Dear all, I need latest dumps for 300-115 switch, email habtesam22 at gmail dot com

  11. Bella
    November 16th, 2017

    Hi everyone, Please send me the latest dump!. is it the 191q?
    lheidy14 at yahoo dot com!

  12. QRT
    December 10th, 2017

    What is the behavior of an access port when a tagged packet is received other than the access VLAN value?
    See VLAN Hopping.

  13. Anonymous
    December 10th, 2017

    Can anyone explain Question 5?
    Which two statements apply to topology-based switching?
    A. It is functionally equivalent to Cisco Express Forwarding
    B. It is the preferred switching mode in Cisco multilayer switches
    C. It uses Loop free protocol for switching
    D. disabled by default

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