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OSN9800 M24 CXP Board inf...

OSN9800 M24 CXP Board info

Created: Nov 29, 2019 14:30:24Latest reply: Nov 30, 2019 01:50:04 711 4 0 0 0
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Dear All,


I have some doubt regarding the CXP board in M24 subrack. I know that it works in 1:1 mode, I am sure that the Controller part is working in Active/Standby, but what about the CrossCOnnect submodule? If I check the HEdex it seems that they work in loadsharing. If so, does it mean that if one board is faulty then all the services will go down? Or we just have a capacity reduction? Anyway, in both cases the services are not protected against a single failure is'n it?


Thank you in advance,


Nicola




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liqiang185
Admin Created Nov 30, 2019 01:50:04

Posted by NicolaZambelli at 2019-11-29 15:47So guys, what is the right answer? Is the cross connect function performed only byu the active board ...

There is no direct conflict between the two modes. If the equipment works in 1:1 load balancing mode, there is no active board or standby board, but the two boards are working. The service traffic of each cross-connect board is far less than the full load. If one cross-connect module board is faulty, the system isolates the cross-connect board. The other cross-connect board loads all cross-connection tasks. The service traffic is close to the full load. However, the cross-connect board is fully capable of carrying out all the cross-connect tasks. In 1:1 protection mode, only one board can be faulty. If the two boards are faulty at the same time, services are interrupted.


Thanks  ernesto_cupet6 for the wonderful answer

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ernesto_cupet6
ernesto_cupet6 Created Nov 29, 2019 15:18:05

Hello

The services will not go down. Loading sharing indicates that all cross-connect boards are in the working state and evenly share service load during the normal operating. If the cross-connect function of a cross-connect board is faulty, the faulty cross-connect board will be automatically isolated, and service boards will not transmit services to the cross-connect board. Based on the load sharing algorithm, traffic is re-allocated among all other cross-connect boards, and then these normal cross-connect boards evenly share service load. If the faulty board is restored to normal, services are automatically returned to the original status.

When cross-connect boards are fully configured in an OSN 9800 M24 subrack, the system can still function properly if no more than one cross-connect board are faulty.

For more information you can check the documentation below:


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liqiang185
liqiang185 Admin Created Nov 29, 2019 15:35:07

Dear Community members！

In 1:1 mode, the control module and cross-connect module are not switched over together. If the control module on the active board is faulty, the device only switches the system control board to the standby board. The standby board replaces the active board and continues to work. The cross-connect function is performed by the active board.

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NicolaZambelli
NicolaZambelli Created Nov 29, 2019 15:47:31

So guys, what is the right answer? Is the cross connect function performed only byu the active board or the 2 CXP are working in load sharing thus a fault in one board will decrease the capacity by half?
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liqiang185
liqiang185 Admin Created Nov 30, 2019 01:50:04

Posted by NicolaZambelli at 2019-11-29 15:47So guys, what is the right answer? Is the cross connect function performed only byu the active board ...

There is no direct conflict between the two modes. If the equipment works in 1:1 load balancing mode, there is no active board or standby board, but the two boards are working. The service traffic of each cross-connect board is far less than the full load. If one cross-connect module board is faulty, the system isolates the cross-connect board. The other cross-connect board loads all cross-connection tasks. The service traffic is close to the full load. However, the cross-connect board is fully capable of carrying out all the cross-connect tasks. In 1:1 protection mode, only one board can be faulty. If the two boards are faulty at the same time, services are interrupted.


Thanks  ernesto_cupet6 for the wonderful answer

Welcome to continue discussions and exchangesi_f01.gif

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