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VSC7511 Datasheet(PDF) 151 Page - Microsemi Corporation |
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VSC7511 Datasheet(HTML) 151 Page - Microsemi Corporation |
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151 / 324 page  Functional Descriptions VMDS-10488 VSC7511 Datasheet Revision 4.2 136 tag type. For each of the fields in the resulting tag, it is programmable how the value is determined. For more information, see <figure reference>. Figure 43 • Tag Construction (port tag, ES0 tag A, ES0 tag B) The port tag, ES0 tag A, and ES0 tag B have individual configurations. For the port tag, the available tag field options are: Port tag: PCP • Use the classified PCP. • Use the egress port’s port VLAN (PORT_VLAN.PORT_PCP). • Map the DP level and QoS class to a new PCP value using the per-port table PCP_DEI_QOS_MAP_CFG. • Use the QoS class directly. Port tag: DEI • Use the classified DEI. • Use the egress port’s port VLAN (PORT_VLAN.PORT_DEI). • Map the DP level and QoS class to a new DEI value using the per-port table PCP_DEI_QOS_MAP_CFG. • Use the DP level directly. Port tag: VID • Use the classified VID. • Use the egress port’s port VLAN (PORT_VLAN.PORT_VID). Port tag: TPID • Use Ethernet type 0x8100 (C-tag). • Use Ethernet type 0x88A8 (S-tag). • Use custom Ethernet type programmed in PORT_VLAN.PORT_TPID. • Use custom Ethernet type programmed in PORT_VLAN.PORT_TPID unless the incoming tag was a C-tag in which case Ethernet type 0x8100 is used. Similar options for the ES0 tag A and ES0 tag B are available: ES0 tag: PCP • Use the classified PCP. • Use ES0_ACTION.PCP_A_VAL for ES0 tag A and use ES0_ACTION.PCP_B_VAL for ES0 tag B. • Map the DP level and QoS class to a new PCP using the per-port table PCP_DEI_QOS_MAP_CFG. • Use the QoS class directly. ES0 tag: DEI • Use the classified DEI. • Use ES0_ACTION.DEI_A_VAL for ES0 tag A and use ES0_ACTION.DEI_B_VAL for ES0 tag B. • Map the DP level and QoS class to a new DEI using the per-port table PCP_DEI_QOS_MAP_CFG. • Use the DP level directly. PCP D E I VID TPID 0x8100 0x88A8 Custom Classified(*2) Classified Fixed Mapped (DP, QoS) QoS class Classified Fixed Mapped (DP, QoS) DP level Classified + fixed(*1) Fixed (*1) For port tag, this is classified only. (*2) Use 0x8100 if classified tag type is 0x8100, otherwise custom. |
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