ZyXEL NetAtlas User Guide - Page 267
Bridging Type, Upstream, Downstream
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Chapter 19 EPON Profile Configuration Table 133 Traffic Bridging Types BRIDGING TYPE UPSTREAM DOWNSTREAM Priority Copy Shared VLAN This mode has the same behavior as the Shared VLAN mode. In this mode, the OLT can also use the priority copy function to change the priority value in the VLAN tag or IP header according to the predefined priority mapping table. See Section 18.1 on page 239 for more information. Transparent Shared VLAN with Broadcast This divides the PON interface into multiple broadcast domains. The links in this mode and having the same VLAN tag belong to the same broadcast group. The OLT forwards a upstream frame whether it has a VLAN tag or not. The OLT also learns the source MAC address of the upstream frames. The OLT forwards the downstream frames to the corresponding links based on the destination address. If the downstream frame's destination address is not found in the MAC table, the OLT broadcasts it to any link in the broadcast group and all other links that broadcast. Use this screen to configure traffic switching mode and the maximum number of MAC addresses that can be learned for each link on an ONU. Once you have set the profile settings, you can apply it to the ONU in the ONU Service Config screens (refer to Section 18.3 on page 244). Your OLT comes with a "Default" profile contains the settings that work in most network environment. When you create a profile having the same name as an existing profile, the previous settings will be replaced in the existing profile. To create a new profile, select the profile type and click Add... in the EPON Profile Configuration screen. NetAtlas EPON Manager User's Guide 267