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DHCP Snooping 3

November 16th, 2018 in SWITCH 300-115 Go to comments

Question 1

Explanation

The command “ip dhcp snooping information option allow-untrusted” enables untrusted ports to accept incoming DHCP packets with option-82 information.

Question 2

Question 3

Question 4

Question 5

Question 6a

Comments
  1. brcinko
    March 24th, 2019

    Q3 Is answer B correct?

    I think it should be answer E: – Stop the Option 82 and forward it

    https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/snoodhcp.html#wp1108657

  2. Ruben
    April 17th, 2019

    Q3

    I think like brcinko. It should be answer E.

    Certprepare?

  3. UncleJ
    April 18th, 2019

    I agree brcinko. answer is E I think.
    Any comments CertPrepare?

  4. UncleJ
    April 19th, 2019

    Q1, 2, 4, 5
    I’m so confuse to understand dhcp snooping configs.
    This is my basic understanding after I reviewed cisco web site.

    Basic config
    Conf# ip dhcp snooping
    Conf# ip dhcp snooping vlan xxx
    Conf# ip dhcp snooping information option
    Conf# ip dhcp snoopting information allowed-untrust

    and then go to interface

    Conf-Int# ip dhcp snooping trust

    and then config other options BUT always(mostly?) start with “ip dhcp snooping…..”

    Conf# ip dhcp snooping xxx xxx
    Conf-Int# ip dhcp snooping xxx xxx

    Only one thing I need to remember is,
    “ip dhcp snooping information allowed-untrust” command can be apply on Conf-Int# also.

  5. Q3
    May 14th, 2019

    Q3 – answer “E” also my choice which matches “DHCP Snooping 2” Question 2
    -also, these Captcha’s really suck!

  6. Anonymous
    May 14th, 2019

    Answer E is not correct because it doesnt stops it…it removes it that is why option b is correct

  7. byunkook
    June 14th, 2019

    B is correct answer.
    192.168.1.254 is relay agent IP address.

    •If the IP address of the relay agent is configured, the switch adds the IP address in the DHCP packet.

    •The switch forwards the DHCP request that includes the option-82 field to the DHCP server.

    https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/snoodhcp.html

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