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Nexus Switching 2nd Edition

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vrf 2 1000 3 0<br />

portchannel<br />

0 768 1 0 741<br />

u4routemem<br />

96 96 1 95 95<br />

u6routemem<br />

24 24 1 23 23<br />

m4routemem<br />

58 58 1 57 57<br />

m6routemem<br />

8 8 1 7 7<br />

egypt#<br />

The output shows how much shared memory in a specific VDC is used for a specific type of<br />

routes; the u4route-mem row indicates memory usage for unicast IPv4 routes. The first five<br />

items up to the port-channel are in numbers; the remaining–mem information is in MBs.<br />

Note<br />

Refer to Chapter 6, “High Availability,” for additional details.<br />

Components are shared between VDCs, which include the following:<br />

• A single instance of the kernel which supports all the processes <strong>and</strong> VDCs<br />

• Supervisor modules<br />

• Fabric modules<br />

• Power supplies<br />

• Fan trays<br />

• System fan trays<br />

• CMP<br />

• CoPP<br />

• Hardware SPAN resources<br />

Figure 1-5 shows the logical segmentation with VDCs on the Nexus 7000. A common use<br />

case is horizontal consolidation to reduce the quantity of physical switches at the data center<br />

aggregation layer. There are two physical Nexus 7000 chassis; the logical VDC layout is<br />

also shown.

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