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DC0014 - ACI L2Out (Part 2)

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The video shows two methods to extend L2 subnets and broadcast domains from Cisco ACI to an external network namely EPG Extension and Extended Bridged Network (L2OUT). We will looks at both scenarios of having a subnet default gateway in ACI and an external network. At the end of the lab, we will demonstrate a server migration from the external network into ACI using the L2 extension we created.
Part 2 of this video covers having DGW in an external network
  • EPG Extension
  • Virtual Port-Channel
  • Mis-Cabling Protocol (MCP)
  • ARP Flooding
  • Extended Bridged Network (L2OUT)
  • L2OUT Contract
  • Server Migration

About Author

Metha Cheiwanichakorn, CCIE#23585 (RS, Sec, SP), is a Cisco networking enthusiast with years of experience in the industry. He is currently working as a consulting engineer for a Cisco partner. As a founder of and an instructor at, Metha enjoys learning and challenges himself with new Cisco technologies.


Hello Metha, just want to ask if a contract is still needed for this setup if EPG WEB wants to communicate with EPG APP even though the gateway is on LM-SW1(assuming contract relationship was removed)? I'm suspecting it is no longer needed. If that is the case then , is there any way that ACI can deny that traffic? Thanks.