Cisco ACL numbering

[AllysonMoran16752]

3

This is a small technical question. I can't seem to find any information on this, so I thought I'd ask here.

I'm currently studying for my CCNA and I'm currently on the topic of ACLs. On IOS standard numbered ACLs go from 1 to 99 and then additional standard ACL numbering is from 1300 to 1999. For the extended ACL the numbering is from 100 to 199 and then from 2000 to 2699.

The question is, what's up with the gap? I haven't found any information about it but I'm just wondering - why? Is there a reason for this or did Cisco just use arbitrary numbers here.

Is there a reason why there is a gap from 200 to 1300.

Thanks!

[Martin L]

there is no gap, just technological advancement and historical need for more sections of acl, see table in https://www.ciscopress.com/articles/article.asp?p=1697887

Regards, ML
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[MHM Cisco World]

AS you see above the number is full BUT only the range 1-99 and 1300-1999 is for IP Packet, other number is use for other Packet type.

[Reedy56]

Each line of an ACL is assigned a sequence number (SN) by default. The first line is given SN 10, and each subsequent line's SN increments by 10. These sequence numbers allow us to enter a line and have it placed in the ACL anywhere we like, rather than it always being tacked on at the bottom.

ACES ETM

[alirafaleiro]

Access Control List (ACL) refers to a specific set of rules used for filtering network traffic, especially in computer security settings. ACLs also allow specific system objects such as directories or file access to authorized users and denies access to unauthorized users.