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Cisco Bug: CSCvt18887 - Throttling from Flooding Suppression should be disabled on Tunnel interface

Last Modified

Sep 29, 2020

Products (1)

  • Cisco Catalyst 9500H Series Switches

Known Affected Releases


Description (partial)

In an SDA network a 'unknown' entry will be present for a special mac address in the IP device tracking database.

Network Layer Address    Link Layer Address Interface  vlan prlvl  age   state     Time left
ARP        0000.0000.00fd     Gi1/0/1   11   0000    0s  UNKNOWN    (29 s)

This entry will not time out and is pointing towards the wrong interface.

1) SDA network
2) Multiple hosts from different edge nodes ARPing for the address at the same time
3) The impacted edge node does not have the hosts locally connected
4) Non-standard MAC address
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Bug Details Include

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