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Cisco Bug: CSCvs48937 - Standard ACLs show repeated and out-of-order sequence numbers in running-config

Last Modified

Jan 13, 2020

Products (1)

  • Cisco IOS

Known Affected Releases

16.12.2 Amsterdam-17.1.1 Gibraltar-16.12.1

Description (partial)

Symptom:
Standard ACLs starting on 16.12x show repeated and out-of-order sequence numbers in running-config, also when copying/pasting sequence numbers in order, remarks go to the bottom of the ACL.

1) Repeated sequence numbers. When copying/pasting below section we get the consequent output in which all remarks and first permit have the same sequence number;

access-list 91 remark /******************
access-list 91 remark NTP authorized servers
access-list 91 remark *******************
access-list 91 permit 10.10.10.0 0.0.0.255
access-list 91 permit 20.20.20.0 0.0.0.255
access-list 91 deny any

C9500(config)#do sh run | beg access-list
ip access-list standard 91
 10 remark /******************
 10 remark NTP authorized servers
 10 remark *******************
 10 permit 10.10.10.0 0.0.0.255
 20 permit 20.20.20.0 0.0.0.255
 30 deny   any

2) Remarks go to the end of the ACL. When copying/pasting below section with sequence numbers in order we see 2 behaviors, first, the sequences are not displayed in order and secondly, remarks go to the bottom of the ACL;

iip access-list standard 79
10 remark /******************
20 remark NTP authorized servers
30 remark *******************
40 permit 30.30.30.1 0.0.0.3
50 permit 40.40.40.5 0.0.0.3
60 permit 50.50.50.1 0.0.0.7
70 permit 60.60.60.9 0.0.0.3
890 permit 1.1.1.1
900 deny any

ip access-list standard 79
 890 permit 1.1.1.1
 40 permit 30.30.30.1 0.0.0.3
 50 permit 40.40.40.5 0.0.0.3
 60 permit 50.50.50.1 0.0.0.7
 70 permit 60.60.60.9 0.0.0.3
 900 deny   any
 10 remark /******************
 20 remark NTP authorized servers
 30 remark ********************

Conditions:
Seen on C9500 running 16.12x, 17.1x
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