Hardware Limitation with ACLs on N-series and following with a true example:
Customer encountered the error listed below while adding access list.
"Error encountered applying ACL to HW. HW limit may have been exceeded."
It is not an error. The N-Series switches have the following ACL software limits:
| ACL Software Limitations (As of firmware 6.3.1.8) |
Dell N1500 Series |
Dell N2000 Series |
Dell N3000 Series |
Dell N4000 Series |
| Maximum number of ACLs (any type) | 100 | 100 | 100 | 100 |
| Maximum number of configurable rules per list. | 1023 | 1023 | 1023 | 1023 |
| Maximum ACL Rules per Interface and Direction (IPv4/L2) | 1023 (ingress) 1023 (egress) |
1023 (ingress) 1023 (egress) |
2048 (ingress) 1023 (egress) |
1023 (ingress) 1023 (egress) |
| Maximum ACL Rules per Interface and Direction (IPv6) | 255 (ingress) 125 (egress) |
1023 (ingress) 509 (egress) |
1659 (ingress) 509 (egress) |
635 (ingress) 509 (egress) |
| Maximum ACL Rules (system-wide) | 3030 | 3914 | 3914 | 3060 |
| Maximum VLAN interfaces with ACLs applied | 24 | 24 | 24 | 24 |
| Maximum ACL Logging Rules (system-wide) | 128 | 128 | 128 | 128 |
Port ranges (highlighted in RED) are NOT supported on egress (out) interfaces. The only port operator supported on egress is the "eq" operator. This is a HW limitation and cannot be "fixed" via SW fix.
ip access-list PrivateNetOUT
permit tcp any any range 22 23
permit tcp 172.25.242.0 0.0.0.255 any eq telnet
permit tcp 172.25.242.0 0.0.0.255 any eq 22
permit icmp any any
permit tcp 172.28.128.21 0.0.0.0 eq 445 10.10.2.0 0.0.0.255
permit tcp 172.25.53.77 0.0.0.0 any
permit udp 172.28.128.21 0.0.0.0 range 135 139 10.10.2.0 0.0.0.255
permit tcp 172.28.128.21 0.0.0.0 range 135 139 10.10.2.0 0.0.0.255
permit tcp 172.28.129.63 0.0.0.0 10.10.2.0 0.0.0.255 eq 445
permit udp 172.28.129.63 0.0.0.0 10.10.2.0 0.0.0.255 range 135 139
permit tcp 172.28.129.63 0.0.0.0 10.10.2.0 0.0.0.255 range 135 139
permit tcp 172.28.129.64 0.0.0.0 10.10.2.0 0.0.0.255 eq 445
permit udp 172.28.129.64 0.0.0.0 10.10.2.0 0.0.0.255 range 135 139
permit tcp 172.28.129.64 0.0.0.0 10.10.2.0 0.0.0.255 range 135 139
permit udp 172.25.2.81 0.0.0.0 10.10.2.0 0.0.0.255 eq ntp
permit udp 172.25.254.1 0.0.0.0 10.10.2.0 0.0.0.255 eq ntp
permit tcp 172.28.128.124 0.0.0.0 10.10.2.51 0.0.0.0 eq ftp-data
permit tcp 172.28.128.124 0.0.0.0 10.10.2.51 0.0.0.0 eq ftp
permit tcp any 10.10.2.49 0.0.0.0 eq 5160
permit tcp 172.28.128.124 0.0.0.0 eq 1025 10.10.2.51 0.0.0.0
permit tcp 172.28.128.124 0.0.0.0 eq 1025 10.10.2.43 0.0.0.0
permit tcp 172.28.128.124 0.0.0.0 10.10.2.43 0.0.0.0 eq ftp-data
permit tcp 172.28.128.124 0.0.0.0 10.10.2.43 0.0.0.0 eq ftp
permit tcp 172.28.128.124 0.0.0.0 10.10.2.52 0.0.0.0 eq ftp-data
permit tcp 172.28.128.124 0.0.0.0 10.10.2.52 0.0.0.0 eq ftp
permit tcp 172.28.128.124 0.0.0.0 10.10.2.43 0.0.0.0 eq 1025
permit udp any 10.10.2.49 0.0.0.0 eq 5160
permit tcp 172.28.128.13 0.0.0.0 eq 1433 any
permit tcp 172.28.128.124 0.0.0.0 10.10.2.51 0.0.0.0 eq 1025
permit tcp 172.28.129.13 0.0.0.0 10.10.2.0 0.0.0.255 eq 1433
permit tcp 172.28.128.0 0.0.3.255 10.10.2.49 0.0.0.0 eq 1433
permit tcp 172.28.128.124 0.0.0.0 eq ftp-data 10.10.2.0 0.0.0.255