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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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VSC7440 датащи(PDF) 161 Page - Microsemi Corporation |
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VSC7440 датащи(HTML) 161 Page - Microsemi Corporation |
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161 / 444 page  Functional Descriptions VMDS-10492 VSC7440 Datasheet Revision 4.2 144 values are looked up and used for lookup in the ARP table. Thus instead of updating ARP_PTR and ECMP_CNT for many LPM VCAP entries, only the corresponding entry in ARP_PTR_REMAP needs to be updated. The following illustration depicts both the case where ARP Pointer remapping is not used as well as the case where it is used, that is ARP_PTR_REMAP_ENA = 1. Figure 35 • ARP Pointer Remapping 3.19.2.5 IP Multicast Routing The multicast system is split into two stages, stage 1 and stage 2. In stage 1, the frame is received on a front port and the IP multicast system in ANA_L3 is activated. This stage is used to ensure L2 forwarding to all relevant ports in the ingress VLAN as well as ingress mirroring. If the frame needs to be L3 forwarded to other VLANs, an internal port module called virtual device 0 (VD0) also receives an L2 copy, together with information about the number of VLANs that receive a routed copy of the frame. LPM VCAP Action (action type: ARP_PTR) ARP_PTR ARP_PTR_REMAP_ENA=1 ECMP_CNT RGID ANA_L3:ARP_PTR_REMAP ARP_PTR ECMP_CNT ANA_L3:ARP LPM VCAP Action (action type: ARP_PTR) ARP_PTR ARP_PTR_REMAP_ENA=0 ECMP_CNT RGID ANA_L3:ARP_PTR_REMAP ARP_PTR ECMP_CNT ANA_L3:ARP ARP_PTR_REMAP Table not used ARP_PTR remapped through ARP_PTR_REMAP Table |
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