No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search


To have a better experience, please upgrade your IE browser.


Feature Description - IP Services 01

NE05E and NE08E V300R003C10SPC500

This is NE05E and NE08E V300R003C10SPC500 Feature Description - IP Services
Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
ACLs Applied to Filtering BFD Passive Echo

ACLs Applied to Filtering BFD Passive Echo

ACLs can be applied to control the range of BFD sessions that to enable with passive echo. By default, passive echo is not enabled.

The BFD echo packet is looped back through ICMP redirect at the remote end. In the IP packet that encapsulates the BFD echo packet, the destination address and the source address are the IP address of the outgoing interface of the local end. Therefore, in the ACL rule, both the source addresses of the remote end and the local end must be permitted.


BFD passive echo supports only basic ACLs, instead of advanced ACLs.

If the ACL applied to an established BFD session is modified, or a new ACL is applied to an established BFD session, the ACL takes effect only when the session re-establishes or the parameters of the session is modified.

Table 3-9 Matching Principle of ACLs Applied to BFD Passive Echo
ACL Matching Result Processing Result
The session matches the permit rule Passive echo is enabled for the session
The session matches the deny rule Passive echo is not enabled for the session
The session mismatches all rules
The relative ACL does not exist Passive echo is not enabled for all sessions
The relative ACL exists but there is no rule in the ACL
Updated: 2019-01-14

Document ID: EDOC1100058931

Views: 9844

Downloads: 17

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Previous Next