dredlorddredlord Member Posts: 172
Dear members, I was wondering if someone could be so kind as to explain loop guard, try as I may to research this feature I cant seem to grasp it. For some reason I keep thinking that loop guard will effectively block a backup path should for some reason the primary path fail.


  • chrisonechrisone Senior Member Member Posts: 2,207 ■■■■■■■■■□
    YOUTUBE is your friend.
    Certs: CISSP, OSCP, CRTP, eCTHPv2, eCPPT, eCIR, LFCS, CEH, AZ-900, VHL:Advanced+, Retired Cisco CCNP/SP/DP
    2021 Goals
    Courses: eLearnSecurity - PTXv2 (complete), SANS 699: Purple Team Tactics (completed), PentesterLabs Pro (ongoing)
    Certs: eCPTXv2, AZ-500, SC-200 (fail 1st attempt), EnCE, Splunk Core Power User
  • BeTheNetworkBeTheNetwork Member Posts: 18 ■□□□□□□□□□
    Don't know if those videos helped you, but Loopguard is just like UDLD but instead uses STP BPDU's as keepalive. Basically, if you have a redundant (physical) switching path, then STP will have a forwarding port and a blocking port. With loopguard, if the blocked port stops receiving BPDUs then the port will be placed into loop-inconsistent state.
Sign In or Register to comment.