Create Acceptable Frame Types

To work with acceptable frame types, you must ensure that the follow prerequisites are met:

• VLAN must be configured.

• PVID for the interfaces must be configured.

• Acceptable frame types must be configured.

See Default Settings for the topology for this procedure.

1. Configure the VLAN in switch 1.

   SEFOS# configure terminal
   SEFOS(config)# vlan 15
   SEFOS(config-vlan)# ports extreme-ethernet 0/15,0/19 untagged extreme-ethernet 0/15,0/19
   SEFOS(config-vlan)# exit
   SEFOS(config)# interface extreme-ethernet 0/15
   SEFOS(config-if)# no shutdown
   SEFOS(config-if)# switchport pvid 5
   SEFOS(config-if)# exit
   SEFOS(config)# interface extreme-ethernet 0/19
   SEFOS(config-if)# no shutdown
   SEFOS(config-if)# switchport pvid 5
   SEFOS(config-if)# end

2. Wait for at least 30 seconds for the topology to settle, then ping host B from host A.

   The ping must be successful.

3. On switch 1, configure the acceptable frame type for port P15.

   SEFOS# configure terminal
   SEFOS(config)# interface extreme-ethernet 0/15
   SEFOS(config-if)# switchport acceptable-frame-type tagged
   SEFOS(config-vlan)# end

4. Review the VLAN-related configurations.

   SEFOS# show vlan id 5
   Vlan database
   -------------------
   Vlan ID             : 5
   Member Ports        : Ex0/15, Ex0/19
   Untagged Ports      : Ex0/15, Ex0/19
   Forbidden Ports     : None
   Name                :
   Status              : Permanent
   ------------------------------------

5. Review the VLAN port configuration table.

   SEFOS# show vlan port config port extreme-ethernet 0/15
   Vlan Port configuration table
   -------------------------------
   Port Ex0/15
   Port Vlan ID                       : 5
   Port Acceptable Frame Type         : Admit Only Vlan Tagged
   Port Ingress Filtering             : Disabled
   Port Mode                          : Hybrid
   Port Gvrp Status                   : Enabled
   Port Gmrp Status                   : Enabled
   Port Gvrp Failed Registrations     : 0
   Gvrp last pdu origin               : 00:00:00:00:00:00
   Port Restricted Vlan Registration  : Disabled
   Port Restricted Group Registration : Disabled
   Mac Based Support                  : Disabled
   Subnet Based Support               : Disabled 
   Port-and-Protocol Based Support    : Enabled
   Default Priority                   : 0
   Tunnel Status                      : Disabled
   Dot1x Protocol Tunnel Status       : Peer
   LACP Protocol Tunnel Status        : Peer
   Spanning Tree Tunnel Status        : Peer
   GVRP Protocol Tunnel Status        : Peer
   GMRP Protocol Tunnel Status        : Peer
   IGMP Protocol Tunnel Status        : Peer
   Filtering Utility Criteria         : Default
   Port Protected Status              : Disabled
   ----------------------------------------------------------------

   After you configure the acceptable frame type as Admit OnlyVLAN Tagged, the ping from host A to host B should fail because ping(1M) packets are untagged.