Loss of links FI L1/L2

Hello

One of my customers wonder about linking the FI 2 L1/L2 loss.

In my mind, this case should not be here, why we have 2 links but I don't know what happened exactly in this case... the 2 FI become master of the UCS cluster...

any idea or already Tester?

THX

The L1/L2 are by data management engine (DME) to synchronize the config only - there is no path of data on these links.

In case these links both go down, there is a rear mechanism built into the system to prevent split brain.  Each frame has a SEEPROM (flash).  Within the SEEPROM, there is a shared area each FI can read & write to and two subzones; an inmate by each FI in which only FI can write to.  The subareas are used to store information about the config DB fails to a bank owner in the same, changes are made and it is reintroduced.  You will avoid 'stale' config overwrite any changes made during a FI was disconnected.

If there is a failure in the cluster llink (L1/L2), IF read and write small counters in the shared area.  This serves as a secondary heartbeat to warn the other FI is always active.  Meanwhile, the cluster starts in a State of 'Failed-Link' and prevents any election primary/secondary.  Everything else as-if - primary primary, secondary rest is secondary.

Kind regards

Robert

Tags: Cisco DataCenter

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