BPDU Guard. The difference between BPDUs filter and loop guard

Source: Internet
Author: User
"Bpdu Guard (BPDU Guard)"
BPDU Guard enables ports with Portfast characteristics to enter the Err-disable state when receiving bpdus to avoid bridging loops, which can be configured under Global or interface (default off)
"Auto recovery when Port enters Err-disable"
Automatic recovery of port status with errdisable recovery cause bpduguard command (the default is restored every 5 minutes)
"BPDU Filter"
Unlike BPDU protection, when the BPDU filter is configured in global or interface mode, the function is different when the switch does not send any BPDUs when enabled in Postfast port mode, and when all the received BPDUs are discarded and enabled in global mode, the port receives any BPDUs , the Portfast state and BPDU filtering functions are discarded and changed back to the normal STP port (the BPDU filter attribute is off by default)
"See if the BPDUs Guard and BPDUs filter are open commands"
Show Spanning-tree Summary
"Priority of BPDUs Guard and BPDU filter"
When both Bpdugraud and Bpdufilter are enabled, the Bpdufilter priority is higher and bpduguard is invalidated
"LOOP Guard"
Loop Guard is primarily used to avoid the case where a blocking port incorrectly transitions to a forwarding state and generates a bridging loop, and when the switch does not receive bpdus on a non-specified port that has the Loopguard feature enabled, the switch causes the port to enter the STP "inconsistent loop" (inconsistentports) blocking state, when the inconsistent port receives BPDUs again, the port automatically filters to the STP state based on the BPDUs. The SH spanning-tree inconsistentports command allows you to view the inconsistent port status. The Loopguard feature is turned on by default.

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.