Enterasys Networks 6000, Matrix E7 manual Ingress List Operation, Egress List Operation

The Device View

Ports on 802.1Q switches are assigned membership in a VLAN by associating a VLAN ID with each port on the switch. The VLAN ID is combined with the port’s identification (e.g., module X port X) to form the Port VLAN ID (PVID).

NOTE

NOTE

When 802.1Q mode is initially activated on a device, all ports are associated with the Default VLAN (VLAN ID 1). If a VLAN ID has not been assigned to a particular port on an 802.1Q switch, any frames received from that port will be classified as belonging to the Default VLAN.

When 802.1Q is implemented for a SmartSwitch 6000 or Matrix E7 that has an HSIM-A6DP installed, each LEC will be represented as an individual port which can be easily assigned membership in a VLAN.

For SmartSwitch 6000 or Matrix E7 firmware versions 4.00.08 and above, the number of LECs supported by the HSIM-A6DP in 802.1Q mode is limited to 32.

Once VLANs have been configured and activated, all frames with unknown destination addresses (including broadcast, unknown multicast, and unknown unicast frames) will be contained within the VLAN of their origin. The switch’s Filtering Database tracks the associations between MAC addresses, VLAN eligibilities, and port numbers, and is used to make forwarding decisions for frames. All VLANs share a single Spanning Tree.

Ingress List Operation

A port’s ingress list specifies the VLAN with which received frames will be associated. The switch’s Filtering Database tracks the associations between VLAN eligibilities, MAC addresses, and port numbers.

Untagged frames received by an 802.1Q switch port are classified according to the VLAN membership of the port that receives the frame.

Tagged frames received by an 802.1Q switch port are classified according to the VLAN indicated in their tag header. A port may receive a tagged frame that specifies a VLAN other than the one assigned to the port.

Egress List Operation

Each port’s egress list specifies which VLANs are associated with the port, and specifies what type of frame (tagged and/or untagged) to transmit for each particular VLAN on a port. This information may be statically defined by the user, or dynamically learned and maintained by the switch’s Filtering Database.

Managing the Module 2-71