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LAN9312 データシート(PDF) 73 Page - SMSC Corporation |
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LAN9312 データシート(HTML) 73 Page - SMSC Corporation |
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73 / 458 page  High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface Datasheet SMSC LAN9312 73 Revision 1.2 (04-08-08) DATASHEET The ingress flow calculation is based on the packet type and the device configuration as shown in Figure 6.8. Figure 6.7 Switch Engine Ingress Flow Priority Selection Figure 6.8 Switch Engine Ingress Flow Priority Calculation Programmable DIFFSERV Table Programmable Port Default Table 3b 3b 2b 6b 3b Packet is Tagged VL Higher Priority Packet is IPv 4 Packet is IP Use Precedence Use IP IPv4(TOS) IPv6(TC) flow priority Source Port VLAN Priority IPv4 Precedence 3b 3b VLAN Enable Priority Calculation Packet is from Host Flow Priority = VLAN Priority N Packet is IPv 4/v6 & Use IP Flow Priority = IP Precedence Y Use Precedence Y N Flow Priority = DIFFSERV[TC] N Y Vlan Enable & Packet is Tagged Y N N Flow Priority = Default Priority[Source Port] Packet is IPv 4 Flow Priority = DIFFSERV[TOS] Y N Get Flow Priority Done VL Higher Priority Vlan Enable & Packet is Tagged N Y Get Flow Priority Packet from Host Y |
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