BugZero | Cisco BugID CSCvx44834 - ASR1K - ACE entry added after object-group is miss...

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BugZero | Cisco BugID CSCvx44834 - ASR1K - ACE entry added after object-group is miss...

ODD
Cisco
CSCvx44834

Cisco - Defect ID: CSCvx44834

ASR1K - ACE entry added after object-group is missing in hardware causing packets drops

ODD
Cisco
CSCvx44834

Cisco - Defect ID: CSCvx44834

ASR1K - ACE entry added after object-group is missing in hardware causing packets drops

Last updated on February 24th, 2026

BugZero Risk Score
7.8 High

Overall: 7.8

Severity: 8.2

Lifecycle: 9.1

Popularity: 4.6

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Bug Details

Description

Symptom

In a large scale ACL config using object-group, any ACE added after the OBG are not added to the hardware table, thereby causing the rule to be missing and the enforcement ignored. The described behavior in this bug can be seen if the supported scale number of ACEs in an ACL is exceeded. As a result, stuck objects and fp download error messages may be generated and not recover without reload. Also, the PI command will not be able to correctly display the total number of ACEs configured once the box enters the broken state.

Conditions

This is seen when object-group is used in combination with regular ACEs. And the root cause is that maximum ACEs in expanded OGACL exceeds the supported maximum, and the platform resources such as memory and TCAM cannot handle it.

Workaround

Delete the ACL, reconfigure it by moving the singular ACEs above the object-group before re-applying on the interface. This can make the new singular ACE work. Or scale can be reduced by removing some OG ACEs to fit the maximum 81920 limit for total expanded ACEs. For OG ACE, each ACE will be expanded to service OG entries * source OG network entries * destination OG network entries.

Further Problem Description

The issue is not seen when the maximum PI limit

Change history

2024-04-02 Added: 16.12.5, 17.3.2

Relevant Products

Click on a version to see all relevant bugs

Affected versions:16.12.5, 17.3.2

Fixed versions: 16.1.0, 16.1.1, 16.1.2, 16.1.3, 16.12.10, 16.12.10a, 16.12.6, 16.12.6a, 16.12.7, 16.12.8, 16.12.9, 16.2.1, 16.2.2, 16.3.1, 16.3.10, 16.3.11, 16.3.1a, 16.3.2, 16.3.3, 16.3.3a, 16.3.4, 16.3.5, 16.3.5a, 16.3.5b, 16.3.5c, 16.3.6, 16.3.7, 16.3.8, 16.3.9, 16.4.1, 16.4.2, 16.4.3, 16.5.1, 16.5.1a, 16.5.1b, 16.5.2, 16.5.3, 16.6.1, 16.6.10, 16.6.1a, 16.6.2, 16.6.2s, 16.6.3, 16.6.4, 16.6.4a, 16.6.4s, 16.6.5, 16.6.5a, 16.6.5b, 16.6.6, 16.6.7, 16.6.7a, 16.6.8, 16.6.9, 16.7.1, 16.7.1a, 16.7.1b, 16.7.2, 16.7.3, 16.7.4, 16.8.1, 16.8.1a, 16.8.1b, 16.8.1c, 16.8.1d, 16.8.1e, 16.8.1s, 16.8.2, 16.8.3, 16.9.1, 16.9.1a, 16.9.1b, 16.9.1c, 16.9.1d, 16.9.1s, 16.9.2, 16.9.2a, 16.9.2s, 16.9.3, 16.9.3a, 16.9.3h, 16.9.3s, 16.9.4, 16.9.4c, 16.9.5, 16.9.5f, 16.9.6, 16.9.7, 16.9.8, 16.9.8a, 16.9.8b, 17.10.1, 17.10.1a, 17.10.1b, 17.11.1, 17.11.1a, 17.12.02a, 17.12.1, 17.12.1w, 17.12.1x, 17.12.2, 17.12.2a, 17.12.3, 17.13.1, 17.13.1a, 17.3.4, 17.3.4a, 17.3.4b, 17.3.4c, 17.3.5, 17.3.5a, 17.3.5b, 17.3.6, 17.3.7, 17.3.8, 17.3.8a, 17.6.1, 17.6.1a, 17.6.1w, 17.6.1x, 17.6.1y, 17.6.1z, 17.6.1z1, 17.6.2, 17.6.3, 17.6.3a, 17.6.4, 17.6.5, 17.6.5a, 17.6.6, 17.6.6a, 17.7.1, 17.7.1a, 17.7.1b, 17.7.2, 17.8.1, 17.8.1a, 17.9.1, 17.9.1a, 17.9.1w, 17.9.1x, 17.9.1x1, 17.9.1y, 17.9.1y1, 17.9.2, 17.9.2a, 17.9.3, 17.9.3a, 17.9.4, 17.9.4a, 17.9.5, 17.9.5a

Relevant Products

Click on a version to see all relevant bugs

Affected versions:16.12.5, 17.3.2

Fixed versions: 16.1.0, 16.1.1, 16.1.2, 16.1.3, 16.12.10, 16.12.10a, 16.12.6, 16.12.6a, 16.12.7, 16.12.8, 16.12.9, 16.2.1, 16.2.2, 16.3.1, 16.3.10, 16.3.11, 16.3.1a, 16.3.2, 16.3.3, 16.3.3a, 16.3.4, 16.3.5, 16.3.5a, 16.3.5b, 16.3.5c, 16.3.6, 16.3.7, 16.3.8, 16.3.9, 16.4.1, 16.4.2, 16.4.3, 16.5.1, 16.5.1a, 16.5.1b, 16.5.2, 16.5.3, 16.6.1, 16.6.10, 16.6.1a, 16.6.2, 16.6.2s, 16.6.3, 16.6.4, 16.6.4a, 16.6.4s, 16.6.5, 16.6.5a, 16.6.5b, 16.6.6, 16.6.7, 16.6.7a, 16.6.8, 16.6.9, 16.7.1, 16.7.1a, 16.7.1b, 16.7.2, 16.7.3, 16.7.4, 16.8.1, 16.8.1a, 16.8.1b, 16.8.1c, 16.8.1d, 16.8.1e, 16.8.1s, 16.8.2, 16.8.3, 16.9.1, 16.9.1a, 16.9.1b, 16.9.1c, 16.9.1d, 16.9.1s, 16.9.2, 16.9.2a, 16.9.2s, 16.9.3, 16.9.3a, 16.9.3h, 16.9.3s, 16.9.4, 16.9.4c, 16.9.5, 16.9.5f, 16.9.6, 16.9.7, 16.9.8, 16.9.8a, 16.9.8b, 17.10.1, 17.10.1a, 17.10.1b, 17.11.1, 17.11.1a, 17.12.02a, 17.12.1, 17.12.1w, 17.12.1x, 17.12.2, 17.12.2a, 17.12.3, 17.13.1, 17.13.1a, 17.3.4, 17.3.4a, 17.3.4b, 17.3.4c, 17.3.5, 17.3.5a, 17.3.5b, 17.3.6, 17.3.7, 17.3.8, 17.3.8a, 17.6.1, 17.6.1a, 17.6.1w, 17.6.1x, 17.6.1y, 17.6.1z, 17.6.1z1, 17.6.2, 17.6.3, 17.6.3a, 17.6.4, 17.6.5, 17.6.5a, 17.6.6, 17.6.6a, 17.7.1, 17.7.1a, 17.7.1b, 17.7.2, 17.8.1, 17.8.1a, 17.9.1, 17.9.1a, 17.9.1w, 17.9.1x, 17.9.1x1, 17.9.1y, 17.9.1y1, 17.9.2, 17.9.2a, 17.9.3, 17.9.3a, 17.9.4, 17.9.4a, 17.9.5, 17.9.5a

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