Medium Access Control (MAC) and Physical Layer (PHY) - CISE

4-June-07 P1901_PRO_016_r0
port using HURTO modulation. In the other cases, the multi-port request will result in several consecutive LLC
service requests related to each unicast local port, or in the use of a native multicast local port.
3. Broadcasts loop back avoidance: on the reception path, upon reception of a packet over the broadcast local port
(127), the module shall discard any packet which is detected as previously transmitted (that is, the MAC address
contained in the PB field of the packet is equal to the MAC address of the node).
4. On the reception path, upon reception of a packet over the broadcast local port (127), the local port passed
within the Eth.ind primitive shall be the one assigned to the remote node from which the request was received.
7 BRIDGING FUNCTION
7.1 General
The bridging function interconnects bridge ports. There are two types of bridge ports: BPL ports and non-BPL ports
and the management port. BPL ports are the bridge ports that represent a remote PL unit and are directly mapped
onto the completed entries of the Port Solver Table. Non-BPL ports are any other external ports of the unit (e.g.
Ethernet, USB, WIFI,…).
The bridging function is based in standards IEEE 802.1D and IEEE 802.1Q as described below.
From a bridging standpoint, the convergence layer is seen as a set of bridge ports called “BPL ports” which are both
transmission and reception unicast and native multicast ports. The bridging block of a node handles as many BPL
unicast ports as there completed entries in the Port Solver Table of this node, in addition to the native multicast
ports that has a valid value in such Port Solver Table. The identifier of a BPL port corresponds to the value of the
local port attached to a remote node, that can be a native multicast or an unicast port. The status (open/close) and the
identifier of the BPL ports are mapped onto the status and identifiers of the local ports defined in the Port Solver
Table.
There is also a BPL management entity that can access all the ports in the same conditions as the higher layer
entities as described in IEEE 802.1D.
*Note: The port solver table includes complete entries and incomplete entries. Complete entries correspond to local
port which are associated to solved remote port and MAC addresses. Incomplete entries correspond to local ports
which associated unicast remote port are still not solved via the Port Solver Protocol.A complete entry may have
an additional native multicast remote port associated.
7.2 IEEE 802.1D conformance
The bridging function shall conform to:
a) IEEE Std 802.1D, with Basic Filtering Services support requirements
Submission page 173 UPA-OPERA