1 © 2003, Cisco Systems, Inc. All rights reserved. VLAN Maps

222 © 2003, Cisco Systems, Inc. All rights reserved. The steps involved in implementing VLAN access lists: 1. Define VLAN Access Map. To define a VLAN access-map use the command: Switch(config)# vlan access-map | }} | {mac address } 3. Define the action to be performed on the filtered traffic. Use the command: Switch(config-access-map)# action {drop | forward [capture] | redirect / } 4. Apply the VACL to a VLAN interface. Use the global configuration command: Switch(config)# vlan filter vlan-list

333 © 2003, Cisco Systems, Inc. All rights reserved. Scenario Build and configure network Create VLAN 100 on switch. Client pool of addresses Allow Accounting Supervisors (Hosts /24) to reach the Accounting Server ( ) Block all other clients in the designated pool from reaching the server Allow ALL other clients outside of the designated pool to reach the server / /24 Fa0/3 Fa0/1

444 © 2003, Cisco Systems, Inc. All rights reserved. VLAN Map Configuration Steps 1.Create named extended ACLs to identify source traffic An ‘allow’ address range‘ A ‘block’ address range The ‘default’ address range (all other traffic) Identify traffic from specific to general 2.Create VLAN Maps using numbered compound statements The numbered statements are executed in ascending order and identify the appropriate action for each address range: (action forward, action drop) 3. Apply the VLAN Map using a VLAN filter Identify the VLAN Map name and corresponding VLAN to be filtered.

555 © 2003, Cisco Systems, Inc. All rights reserved. Create named Extended ACLs Use specific Information for authorized traffic Allow Switch(config)#ip access-list extended AllowAcctTraffic Switch(config-ext-nacl)#permit tcp host eq www

666 © 2003, Cisco Systems, Inc. All rights reserved. Create named Extended ACLs Use specific Information for authorized traffic Allow-----Block Switch(config)#ip access-list extended AllowAcctTraffic Switch(config-ext-nacl)#permit tcp host eq www Switch(config)#ip access-list extended BlockAcctTraffic Switch(config-ext-nacl)#permit tcp host eq www

777 © 2003, Cisco Systems, Inc. All rights reserved. Create named Extended ACLs Use specific Information for authorized traffic Allow-----Block----- Default Switch(config)#ip access-list extended AllowAcctTraffic Switch(config-ext-nacl)#permit tcp host eq www Switch(config)#ip access-list extended BlockAcctTraffic Switch(config-ext-nacl)#permit tcp host eq www Switch(config)#ip access-list extended DefaultAcctTraffic Switch(config-ext-nacl)#permit ip any any

888 © 2003, Cisco Systems, Inc. All rights reserved. Create VLAN Access Map Switch(config)# vlan access-map AcctTrafficMap 10 Switch(config-access-map)# match ip address AllowAcctTraffic Switch(config-access-map)#action forward Switch(config-access-map)#exit

999 © 2003, Cisco Systems, Inc. All rights reserved. Create VLAN Access Map Switch(config)# vlan access-map AcctTrafficMap 10 Switch(config-access-map)# match ip address AllowAcctTraffic Switch(config-access-map)#action forward Switch(config-access-map)#exit Switch(config)# vlan access-map AcctTrafficMap 20 Switch(config-access-map)# match ip address BlockAcctTraffic Switch(config-access-map)#action drop Switch(config-access-map)#exit

10 © 2003, Cisco Systems, Inc. All rights reserved. Create VLAN Access Map Switch(config)# vlan access-map AcctTrafficMap 10 Switch(config-access-map)# match ip address AllowAcctTraffic Switch(config-access-map)#action forward Switch(config-access-map)#exit Switch(config)# vlan access-map AcctTrafficMap 20 Switch(config-access-map)# match ip address BlockAcctTraffic Switch(config-access-map)#action drop Switch(config-access-map)#exit Switch(config)# vlan access-map AcctTrafficMap 30 Switch(config-access-map)# match ip address DefaultAcctTraffic Switch(config-access-map)#action forward Switch(config-access-map)#end

11 © 2003, Cisco Systems, Inc. All rights reserved. Create VLAN Filter & Apply to correct VLAN Switch(config)#vlan filter AcctTrafficMap vlan-list 100 To verfiy: show vlan filter

12 © 2003, Cisco Systems, Inc. All rights reserved. Corresponding parts-Allow Named ACL & VLAN Map Allow Switch(config)#ip access-list extended AllowAcctTraffic Switch(config-ext-nacl)#permit tcp host eq Switch(config)# vlan access-map AcctTrafficMap 10 Switch(config-access-map)# match ip address AllowAcctTraffic Switch(config-access-map)#action forward Switch(config-access-map)#exit..... Switch(config)#vlan filter AcctTrafficMap vlan-list 100

13 © 2003, Cisco Systems, Inc. All rights reserved. Corresponding parts-Block Named ACL & VLAN Map Block Switch(config)#ip access-list extended BlockAcctTraffic Switch(config-ext-nacl)#permit tcp host eq Switch(config)# vlan access-map AcctTrafficMap 20 Switch(config-access-map)# match ip address BlockAcctTraffic Switch(config-access-map)#action drop Switch(config-access-map)#exit..... Switch(config)#vlan filter AcctTrafficMap vlan-list 100

14 © 2003, Cisco Systems, Inc. All rights reserved. Corresponding parts-Default Named ACL & VLAN Map Default Switch(config)#ip access-list extended DefaultAcctTraffic Switch(config-ext-nacl)#permit ip any any..... Switch(config)# vlan access-map AcctTrafficMap 30 Switch(config-access-map)# match ip address DefaultAcctTraffic Switch(config-access-map)#action forward Switch(config-access-map)#exit..... Switch(config)#vlan filter AcctTrafficMap vlan-list 100

15 © 2003, Cisco Systems, Inc. All rights reserved. Verify Configuration---Test Connectivity To verify configuration, use show vlan access-map To test connectivity or blocked connectivity Add clients with appropriate IP addresses or use extended ping commands