Appending remarks and related ACEs to the end of an ACL

To include a remark for an ACE that will be appended to the end of the current ACL:

Procedure
  1. Enter the remark first.
  2. Then enter the related ACE. This results in the remark and the subsequent ACE having the same sequence number.

To append an ACE with an associated remark to the end of an ACL named "List-100," enter remarks from the CLI context for the desired ACL: 
Switch(config)# ipv6 access-list List–100
Switch(config–ipv6–acl)# permit tcp host 2001:db8:0:b::100:17 eq telnet any
Switch(config–ipv6–acl)# permit tcp host 2001:db8:0:b::100:23 eq telnet any
Switch(config–ipv6–acl)# remark “BLOCKS UNAUTH TELNET TRAFFIC FROM SUBNET B”
Switch(config–ipv6–acll)# deny tcp 2001:db8:0:a::/64 eq telnet any
Switch(config–ipv6–acl)# show access-list List–100 config

ipv6 access-list "List–100"
    10 remark "TEXT"
    10 permit tcp 2001:db8:0:b::100:17/128 eq 23 ::/0
    20 permit tcp 2001:db8:0:b::100:23/128 eq 23 ::/0
    30 remark "BLOCKS UNAUTH TELNET TRAFFIC FROM SUBNET B"
    30 deny tcp 2001:db8:0:b::/64 eq 23 ::/0
  exit
Switch(config–ipv6–acl)#
The remark is assigned the same number as the immediately following ACE ("30" in this example) is assigned when it is automatically appended to the end of the list. This operation applies where new remarks and ACEs are appended to the end of the ACL and are automatically assigned a sequence number.