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Cisco ACI Cookbook by Stuart Fordham

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We can also check that the communication is working using the following command on the APIC:

netstat -ant | grep :12

Check that the output lists the connections as ESTABLISHED:

apic1# netstat -ant | grep :12tcp        0      0 10.0.0.1:12151              0.0.0.0:*                   LISTEN      <truncated>  tcp        0      0 10.0.0.1:12567              10.0.248.29:49187           ESTABLISHED tcp        0      0 10.0.0.1:12343              10.0.248.30:45965           ESTABLISHED tcp        0      0 10.0.0.1:12343              10.0.248.31:47784           ESTABLISHED tcp        0      0 10.0.0.1:12343              10.0.248.29:49942           ESTABLISHED tcp        0      0 10.0.0.1:12343              10.0.248.30:42946           ESTABLISHED tcp        0      0 10.0.0.1:50820              10.0.248.31:12439           ESTABLISHED <truncated>apic1# 

We will have some rows in the LISTEN state (so new devices can connect), but the nodes (the 10.0.248. addresses) should be established. ...

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