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VSC7440 Datasheet(PDF) 282 Page - Microsemi Corporation |
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VSC7440 Datasheet(HTML) 282 Page - Microsemi Corporation |
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282 / 444 page  Functional Descriptions VMDS-10492 VSC7440 Datasheet Revision 4.2 265 • Map DE and QoS class to a new DEI value using the per-port table DEI_MAP_DEx. • Map DE and COSID to a new DEI value using the per-port table DEI_MAP_DEx. • Map DE and classified PCP to a new DEI value using the per-port table DEI_MAP_DEx. Port Tag: VID Use REW:PORT:TAG_CTRL.TAG_VID_CFG to configure the following: • Use the classified VID. • Use the egress port’s port VLAN (PORT_VLAN_CFG.PORT_VID). • Use VMID from router leg lookup. When L3 routing is active, the classified VID is overwritten by the VMID. Port Tag: TPID Use REW:PORT:TAG_CTRL.TAG_TPID_CFG to configure the following: • Use Ethernet type 0x8100 (C-tag). • Use Ethernet type 0x88A8 (S-tag). • Use one of three custom TPIDs programmed in REW::TPID_CFG.TPID_VAL. • The TPID is classified by ANA and selected by IFH. Similar options for the ES0 tag A to tag C are available: ES0 Tag: PCP Use ES0 action TAG_x_PCP_SEL to configure the following: • Use the classified PCP. • Use ES0_ACTION.PCP_x_VAL. • Use PCP of popped tag (IFH.VSTAX.TAG.WAS_TAGGED = 1 and num_popped_tags>0) else PCP_x_VAL. • Use the complex mapping functionality provided by ES0 to lookup a PCP value. ES0 Tag: DEI Use ES0 action TAG_x_DEI_SEL to configure the following: • Use the classified DEI. • Use ES0_ACTION.DEI_x_VAL. • Use the complex mapping functionality provided by ES0 to lookup a DEI value. • Use DEI of popped tag (IFH.VSTAX.TAG.WAS_TAGGED = 1 and num_popped_tags>0) else DEI_x_VAL. • Use the mapped DP to DE level (color) directly. ES0 Tag: VID Use ES0 action TAG_x_VID_SEL to configure the following: • Tag A and B: Use the classified VID incremented with ES0.VID_x_VAL. Tag C: Use the classified VID. • Use ES0_ACTION.VID_x_VAL. ES0 Tag: TPID Use ES0 action TAG_x_TPID_SEL to configure the following: • Use Ethernet type 0x8100 (C-tag). • Use Ethernet type 0x88A8 (S-tag). • Use one of three custom TPIDs programmed in REW::TPID_CFG.TPID_VAL. • TPID is classified by ANA and selected via IFH. GCPU or mirror forwarding can optionally insert additional tags. These will always be added as the outermost tags. One or two special tags (A and B) can be added. The tag construction options as follows: Special Tag A+B: PCP • Use the classified PCP. • Use fixed value. Special Tag A+B: DEI |
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