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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.

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