By default, the Cisco IP phone forwards the voice traffic with an 802.1Q priority of 5. Creates a special 802.1Q trunk (so called trunk later)Negotiated by DTP and CDP (provisioning of the vvid)CoS (Class of Service) in 802.1p bits (later)vvid puts:Voice packets on voice VLANVoice VLAN is configured.Data packets in Native VLANVLAN 1 by default unless modified on the switchCan configure the data VLAN to be a a VLAN other than Native or Voice. (coming)Switch(config)# interfacetype mod/numSwitch(config-if)# switchport voice vlan vlan-idVoice:Tagged as vvidData:Untagged: Native VLANRecommended Option802.1Q trunkCoS in 802.1p bits
48Configuring Voice VLAN OperationPortfast is automatically enabled with voice VLAN. Voice:Tagged as voice VLAN 100Data:Untagged: Native VLAN802.1Q trunkCoS in 802.1p bitsSwitch(config)#interface FastEthernet0/24Switch(config-if)#switchport voice vlan 100Switch(config-if)#switchport access vlan 20Tagged as VLAN 20Switch#show runinterface FastEthernet0/24switchport voice vlan 100switchport access vlan 20spanning-tree portfastMore to come!Recommended Option
Configuring WLAN Operation49
50Traditional WLAN ArchitectureTraditional WLAN each AP serves as the central hub for its own BSS.Each AP must be configured individually for network policies including:Radio frequency (RF)Security policiesAuthentication and associationMonitoring trafficQoSBandwidth policingRogue AP detectionCisco calls this an autonomous mode AP.Traffic patterns for an autonomous AP are completely handled by the AP.BSSRange
51Traditional WLAN ArchitectureAP can support multiple SSIDs if multiple VLANs are extended to it over a trunk link.If you want to offer the same SSIDs from several automous APs, the VLANS must be extended to the APs in a contiguous manner.Problemis that the SSID and its VLAN would have to be extended everywhere the user could possibly roam.This would cause end-to-endor campus-wide VLANswhich is not good network design practice.SwitchedRouted
52Cisco Unified Wireless Network ArchitectureCisco Unified Wireless Network Architecturecentralizes many traditional capabilities moving many functions to a central location including:WLAN securityWLAN deploymentWLAN managementWLAN controlReal-time ProcessesReal-time ProcessesManagement ProcessesManagement ProcessesRF Transmit/ReceiveMAC ManagementEncryptionRF Transmit/ReceiveMAC ManagementEncryptionRF ManagementAssociation & RoamingManagementClient AuthenticationSecurity ManagementQoSRF ManagementAssociation & RoamingManagementClient AuthenticationSecurity ManagementQoSLWAPP orCAPWAP TunnelTraditional WLANCisco Unified Wireless Network
53Cisco Unified Wireless Network ArchitectureReal-timeprocesses include:Sending/receiving 802.11 frames, AP beacons, probes, data encryption.