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Cisco Bug: CSCvi09442 - Cat9400 - Incorrect DACL applied to port

Last Modified

Oct 30, 2019

Products (1)

  • Cisco Catalyst 9400 Series Switches

Known Affected Releases

16.6.2 Fuji-16.8.1

Description (partial)

On a Cat9400 using MAB, an incorrect DACL may be applied to some previously authenticated interfaces when another interface authenticates and uses a different DACL. The new DACL will be applied to the interfaces instead.

This can cause unexpected loss of connectivity or allow traffic to pass that shouldn't.

Interface X: Authenticates on phone profile, uses DACL A
Interface Y: Authenticates on default profile, uses DACL B

Assuming interface X is already up and authenticated, when interface Y comes up and authenticates, both interfaces X and Y will have DACL B applied.

1. "show access-session interface <intf> detail" for affected endpoint will still show as "Auth Success" for MAB and correct DACL associated with interface.
2. "show platform software fed active acl iifid <endpoint_iifid>" will show that affected interface is associated with correct DACL and Group GCID.
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