Home > Switch Questions

Switch Questions

April 15th, 2017 in SWITCH 300-115 Go to comments

Question 1

Explanation

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

Explanation

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

Explanation

Storm control prevents traffic on a LAN from being disrupted by a broadcast, multicast, or unicast storm on one of the physical interfaces. A LAN storm occurs when packets flood the LAN, creating excessive traffic and degrading network performance. Errors in the protocol-stack implementation, mistakes in network configurations, or users issuing a denial-of-service attack can cause a storm.
Storm control (or traffic suppression) monitors packets passing from an interface to the switching bus and determines if the packet is unicast, multicast, or broadcast. The switch counts the number of packets of a specified type received within the 1-second time interval and compares the measurement with a predefined suppression-level threshold.

Storm control uses one of these methods to measure traffic activity:
+ Bandwidth as a percentage of the total available bandwidth of the port that can be used by the broadcast, multicast, or unicast traffic
+ Traffic rate in packets per second at which broadcast, multicast, or unicast packets are received
+ Traffic rate in bits per second at which broadcast, multicast, or unicast packets are received

With each method, the port blocks traffic when the rising threshold is reached. The port remains blocked until the traffic rate drops below the falling threshold (if one is specified) and then resumes normal forwarding. If the falling suppression level is not specified, the switch blocks all traffic until the traffic rate drops below the rising suppression level. In general, the higher the level, the less effective the protection against broadcast storms.

The command “storm-control broadcast level 75 65” limits the broadcast traffic up to 75% of the bandwidth (75% is called the rising threshold). The port will start forwarding broadcast traffic again when it drops below 65% of the bandwidth (65% is called the falling threshold).

Note: If you don’t configure the falling threshold, it will use the same value of the rising threshold.

Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12-2_25_fx/configuration/guide/2960scg/swtrafc.html#wp1063295

Question 5

Explanation

By using the “storm-control broadcast level [falling-threshold]” we can limit the broadcast traffic on the switch.

Question 6

Explanation

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 7

Question 8

Explanation

The command “storm-control action {shutdown | trap} ” specifies the action to be taken when a storm is detected. The default is to filter out the traffic and not to send traps.
+ Select the shutdown keyword to error-disable the port during a storm.
+ Select the trap keyword to generate an SNMP trap when a storm is detected.

Comments
Comment pages
  1. Anonymous
    September 19th, 2016

    hi Uk
    please provide me with the 191q .
    thank u in advance.

  2. UK
    September 19th, 2016

    its available on google pdf

  3. JR
    September 20th, 2016

    Link pdf ?

  4. Anonymous
    September 21st, 2016

    dumps please a (.) leonmr (arroba) gmail (.) com

  5. Anonymous
    September 22nd, 2016

    please help guy I need 191q

    siphiwekay13@gmail

  6. DUX
    September 23rd, 2016

    I took the CCNP switch exam on the 19th of September. The SIMs were LACP, HSRP and AAAdo1t1x and there were exactly the same as posted on this website. All the objectives questions were from this website as well. I thought I would’ve scored 1000/1000 because all the answers I provided were exactly what was on this website but to my dismay I passed with only 811/1000. So please use other sources to verify your answers if possible. Cheers.

  7. Steve
    September 28th, 2016

    Please help Uk. I need 191q also.
    Thank you in advance

    {email not allowed}

  8. Steve
    September 28th, 2016

    Please help Uk. I need 191q also.
    Thank you in advance

    weiser95 at g mail

  9. brcdhacksaw
    September 28th, 2016

    for question 8. why is storm-control action trap acceptable?

  10. Anonymous
    September 29th, 2016

    Please send me questions at {email not allowed}

  11. Anonymous
    September 29th, 2016

    Please send me questions at mtrawjani@gmail .com

  12. Anonymous
    September 29th, 2016

    please send me question at ccvv123456@outlook .com

  13. effbee0
    September 29th, 2016

    Please send me 191q
    effbee0 (at) gmail (dot) com

  14. Anonymous
    September 29th, 2016

    Please can someone send me S

  15. Pk
    September 29th, 2016

    Hi everyone, can any one send me a latest dumps of switch
    Hassanwali(dot)khan(at)yahoo(dot)com

  16. Decepticon
    October 1st, 2016

    191q 100% valid
    LACP LAB
    HSRP LAB questions
    DOT1X LAB
    Passed 895/1000 30th October 2016!

  17. Trophy365
    October 4th, 2016

    Please send 191q. Thanks in advance.

    {email not allowed}

  18. Trophy365
    October 4th, 2016

    kassksmith1(at)gmail(dot)com

    thanks.

  19. rmacena
    October 4th, 2016

    hi all.
    Please, Is possible to share with me the 191q dump?? Email rodrigo.macena(at)gmail(dot)com

  20. Anonymous
    October 5th, 2016

    Please send me 191q, thanks in advance!

    jaxisnoob1(at)gmail(dot)com

  21. Anonymous
    October 5th, 2016

    Please send me 191q, thanks in advance

    {email not allowed}

  22. Anonymous
    October 5th, 2016

    dumps please juanalbertoh (arroba) gmail (.) com

  23. RF
    October 5th, 2016

    Please send me 191q, thanks in advance!
    rb75361(at)gmail(dot)com

  24. Anonymous
    October 10th, 2016

    Please send me the dumps on ka.mazhar(at)gmail(dot)com

  25. Anonymous
    October 17th, 2016

    I readed 191q and have same answers than pass4sure exam, and the same answers than certprepare, the only difference could be at the lab trunk between switch_A and switch_B, since switch B could be a 3500 or greater it needs configure encapsulation dot1q and 2960 switch does not need it, so I guess 191q version is only designed for this lab with two switchs 2960, but you need to check at the exam wich types of switchs are you facing with the ” show version ” command

  26. major
    October 18th, 2016

    Please send 191q.
    Thanks in advance.

    {email not allowed}

  27. Moechy
    October 20th, 2016

    Hi all. Can anyone pls assist with any dumps and questions&answers on this exam. Pls email to {email not allowed}
    Thanks in advance

  28. Moechy
    October 20th, 2016

    Hi all. Can anyone pls assist with any dumps and questions&answers on this exam. Pls email to gorrylmc(at)yahoo(dot)com
    Thanks in advance

  29. Anonymous
    October 29th, 2016

    191q is valid

    LACP LAB
    HSRP LAB questions
    DOT1X LAB

    passed 853/1000 27/10/2016

  30. Jake
    October 30th, 2016

    All the questions are missing just answers?

  31. Vicky07
    October 30th, 2016

    Is 191 questions valid??? I am planning to take exam. This week.

  32. Vicky07
    October 30th, 2016

    Can anyone send dumps to zakgoven(at)gmail(dot)com

  33. deva
    October 30th, 2016

    Passed. Exam came exactly same as in dumps. I got material from below page

    Remove asteriks
    c*c*n*p*-*s*w*i*t*c*h*3*0*0*-*1*1*5*.*b*l*o*g*s*p*o*t*.*c*o*m

  34. Mick
    November 2nd, 2016

    Hi all,
    it’s possible to send a valid dumps to crazy97-2(at)outlook(dot)fr
    thanks a lot

  35. Sorkatti165
    November 2nd, 2016

    hi Anonymous and all
    Please , can Anonymous or any one of friends send last dump have 191Q to my email : sorkatti165 at gmail dot com
    regard

  36. Vicky07
    November 5th, 2016

    Hi anonymous, can u send dumps to zakgoven(at)gmail(dot)com

  37. Anonymous
    November 6th, 2016

    Hello guys !
    correct

  38. MUTU
    November 6th, 2016

    hey Anonymous would please send me the dump on
    nadim-sharabaty(at)outlook.com

    thanks

  39. Anonymous
    November 6th, 2016

    Hi Everybody
    Could you please send me the 191q to dszalkay(at)gmail(dot)com, thanks a lot.

  40. Kimberly
    November 7th, 2016

    210-060 – I have download this one from https://www.mrcerts.com/210-060-test.html it has all the new questions , see below the new questions looks to me all are valid one that new are coming Perfect!!!!!!! This is the exact way of me understanding the problem. Thank you and god bless you.

  41. Networking
    November 12th, 2016

    can anyone share the link for these questions ???

  42. Vicky
    November 13th, 2016

    Has any one recently passed the exam?

  43. Anna
    November 14th, 2016

    Grade4sure is the right choice to provide you Cisco 300-115 Dumps. These dumps have 300-115 exam questions answers in both PDF and Online Test Engine formats. All question answers are written to the highest standards of technical accuracy by our certified professionals.
    http://www.grades4sure.com/300-115-exam-questions.html

  44. Asuka
    November 17th, 2016

    I passed the written exam by scoring 95%. Most of the questions are from the http://www.testmayor.com dumps, though the sequences of choices are changed, so it is better to understand the concepts beforehand and go through the dumps so that you will not be surprised in the exam.

  45. Annonymus
    November 19th, 2016

    http://www.testmayor.com/ & http://www.grades4sure.com/300-115-exam-questions.html
    Both sites seems to be sister concern, same design… Cannot garuntee on these sites, there are no comments from people in this site. Please post some genuine websites which has clients feedback.

  46. Tayla Manessis
    November 22nd, 2016

    If I say, it is not very tough to clear CCNA certification exam while studying by yourself. Several online documents and tutorials are available which can help you to get through the concepts and tricks. But, to a little extent it is required to have some practical knowledge in networking before attempting CCNA exam with self study. https://www.braindumps4it.com/braindumps-300-115.html

  47. Anonymous
    December 3rd, 2016

    please send 191q at ermagerma(at)yahoo.com

  48. Tanveer
    December 5th, 2016

    Pass today got 874/1000 191 is valid dumps… labs aaa and lacp …hsrp sim question…. all questions came from 191 .. thanks certpreapre… thanks alot

  49. Ussy
    December 6th, 2016

    Tanveer please can you send me the dumps you used to kinzplay @ Hotmail . com

    Thanks

  50. Bingo
    December 6th, 2016

    Can someone please mail me the valid dumps at {email not allowed} …thanks in advance

Comment pages
  1. No trackbacks yet.