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Connected device fails to receive ARP responses

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TitleConnected device fails to receive ARP responses
Symptoms
- ARP request is not egressing switch
- Mac addresses are not installed in hardware
- frequent mac moves between mlag port and ISC
- disable / enable one port in lag resolves issue
Environment
Summit ALL
BlackDiamond ALL
EXOS 15.1.1
Cause
Upon detecting a learn notification on a port with learning disabled, the mac is deleted from hardware.  This leaves FDBmgr's copy in tact.
Resolution
This is a known issue covered under CR xos0063368

Please upgrade to one of the following releases:

21.1.1.1
16.2.1
16.1.3.6
15.6.4.2-patch1-3
15.7.3.1-patch1-3
Additional notes

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