Cisco WS-C2950G-12-EI Software Guide - Page 222
Configuring Private VLANs, Verifying Auxiliary VLAN Configuration
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Configuring Private VLANs Chapter 10 Configuring VLANs The default setting is none. Table 10-3 lists the set port auxiliaryvlan command keywords and their descriptions. Table 10-3 Keyword Descriptions Keyword dot1p untagged none Action Specify that the phone send packets with 802.1p priority 5. Specify that the phone send untagged packets. Specify that the switch not send any auxiliary VLAN information in the CDP packets from that port. Verifying Auxiliary VLAN Configuration To verify auxiliary VLAN configuration status, perform this task in privileged mode: Task Verify auxiliary VLAN configuration status. Command show port auxiliaryvlan {vlan | untagged | dot1p | none} This example shows how to verify auxiliary VLAN configuration status: Console> show port auxiliaryvlan 123 AuxiliaryVlan AuxVlanStatus Mod/Ports 222 active 1/2,2/1-3 Console> Configuring Private VLANs A private VLAN is a VLAN that you configure to have some Layer 2 isolation from other ports within the same private VLAN. Ports belonging to a private VLAN are associated with a common set of supporting VLANs that are used to create the private VLAN structure. You can configure private VLANs and normal VLANs from the same Catalyst 4500 series switch. The three types of private VLAN ports are as follows: • A promiscuous port communicates with all other private VLAN ports and is the port that you use to communicate with routers, LocalDirector, the CSS11000, backup servers, and administrative workstations. Note If a broadcast or multicast packet comes from the promiscuous port, it is sent to all the ports in the private VLAN domain, that is, to all the community and isolated ports. • An isolated port has complete Layer 2 separation, including broadcasts, from other ports within the same private VLAN with the exception of the promiscuous port. • Community ports communicate among themselves and with their promiscuous ports. These ports are isolated at Layer 2 from all other ports in other communities or isolated ports within their private VLAN. Broadcasts propagate only between associated community ports and the promiscuous port. 10-16 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 78-15486-01
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