Hello.. is there any possibility to update ACL remark on the top of ACL without removing and adding ACL.
ip access-list extended VC_ACL
remark Match_VC_Traffic ---------------- to be update
permit udp any range 16384 32767 any dscp cs4
permit udp any range 49152 65535 any dscp cs4
RR#sh ip access-lists VC_ACL
Extended IP access list VC_ACL
5 permit udp any range 16384 32767 any dscp cs4
10 permit udp any range 49152 65535 any dscp cs4
Unfortunately, "remarks" don't have sequence numbers, so you can't inject or replace a specific "remark". Your only solution is to just reconfigure the ACL.
I guess one way to 'solve' this would be to copy the startup config to a TFTP server, edit the text file and add the remark at the desired position, copy the edited file back to flash, and the issue the command 'copy startup-config running-config'.