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Chapter 15: Access Control Lists

Section II: Advanced Operations 240

❑ It does not matter the order in which you add ACLs to a port. An

ingress packet is compared against all the ACLs assigned to a port.

❑ A classifier can be assigned to multiple ACLs. However, a classifier

cannot be assigned more than once to a port. Put another way,

ACLs that have the same classifier cannot be assigned to the same

port.

❑ The switch can store up to 64 ACLs.

Examples This section contains several examples of ACLs.

In this example, port 4 is assigned a deny ACL for the subnet 149.11.11.0.

This ACL prevents the port from accepting any traffic originating from

that subnet. Since this is the only ACL applied to the port, all other traffic

is accepted. As explained earlier, a port automatically accepts all packets

that do not meet the criteria of the classifiers assigned to its ACLs.

Figure 71 ACL Example 1

Create Access Control Lists (ACL)

1 - ACL ID ................. 4

2 - Description .......... 149.11.11-deny

3 - Action .................. Deny

4 - Classifier List ...... 22

5 - Port List .............. 4

Create Classifier

01 - Classifier ID: ..... 22

02 - Description: ...... 149.11.11 flow

12 - Src IP Addr: ..... 149.11.11.0

13 - Src IP Mask ..... 255.255.255.0

1 2 ... 235 236 237 238 239 240 241 242 243 244 245 ... 759 760

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