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How BFD can help OLT fail...

How BFD can help OLT failover fast?

Created: Apr 8, 2019 02:08:07Latest reply: Apr 9, 2019 06:13:30 531 5 0 0 0
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Hi, what is the differece to configure BFD or without BFD for OLT type B dual homing protection failover? How fast the OLT failover occur if configured BFD or no BFD? please advise, thanks in advance.

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Krystal
Created Apr 8, 2019 08:26:00

Hey!

BFD is used to detect faults that do not cause the port to be down, but service interruption. 

For example, single-fiber faults, upper-layer protocol module faults, interface board forwarding faults and optical transmission equipment faults between NEs. 

After BFD has been configured in the protection group, the fault can be quickly detected and then triggered in the preceding scenarios.
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WheatGrass
WheatGrass Created Apr 8, 2019 07:01:36

You may refer to this link for BFD configuration:
https://support.huawei.com/hedex/pages/EDOC110001850131180AKK/03/EDOC110001850131180AKK/03/resources/cmd/display_bfd_configuration.html?ft=0&fe=10&hib=17.25.3.30&id=display_bfd_configuration&text=display%20bfd%20configuration&docid=EDOC1100018501

Usage Scenario:
When there are a great number of BFD sessions, you can view BFD session with specified type, name or bound peer address.

Precautions:
No matter whether a static BFD session with automatically negotiated discriminators is the same as a dynamic BFD session or not, both the BFD sessions are displayed as dynamic sessions when a BFD type (static or dynamic) is queried.

For BFD Configuration, please refer to this link:
https://support.huawei.com/hedex/pages/EDOC110001850131180AKK/03/EDOC110001850131180AKK/03/resources/cmd/bfd_configuration.html?ft=0&fe=10&hib=17.25.3&id=board_management_2&text=BFD%20Configuration&docid=EDOC1100018501
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Peter2019
Peter2019 Created Apr 8, 2019 07:06:41

thanks, but you didn't answer my questions.
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Krystal
Krystal Created Apr 8, 2019 08:26:00

Hey!

BFD is used to detect faults that do not cause the port to be down, but service interruption. 

For example, single-fiber faults, upper-layer protocol module faults, interface board forwarding faults and optical transmission equipment faults between NEs. 

After BFD has been configured in the protection group, the fault can be quickly detected and then triggered in the preceding scenarios.
View more
  • x
  • convention：
(0) (0)
5#
Peter2019
Peter2019 Created Apr 8, 2019 09:44:02

thanks for your reply. if without BFD, if link down, how long will it trigger OLT failover?
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GongXiaochuan
GongXiaochuan Created Apr 9, 2019 06:13:30

Posted by Peter2019 at 2019-04-08 09:44 thanks for your reply. if without BFD, if link down, how long will it trigger OLT failover?
it depend of you live network , example:

you have all the protect group configure on the OLT side , and the fiber cut between switch and OLT, it will taking less than 2S to resolve it
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