Tag Archives: ACI configuration

ISIS, COOP, BGP and MP-BGP in Cisco ACI

Let me start with a picture.  Imagine a simple 2leaf/2spine topology with HostA attached to to Leaf1 and with HostB attached to to Leaf2. Enter IS-IS. The leaves and spines will exchange IS-IS routing updates with each other so that Leaf1 sees that it has two equally good paths to reach Leaf2, and Leaf2 sees that it has two equally good paths to reach Leaf1. Now think about the hosts. This is where COOP comes in. BGP is not needed until an external router is connected. Continue reading

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Non overlapping VTEP IP addresses in Cisco ACI

Cisco recommends that “The TEP IP address pool should not overlap with existing IP address pools that may be in use by the servers (in particular, by virtualized servers).”
Let me tell you a reason much closer to reality why you might want to avoid overlapping your Cisco ACI TEP addresses with your locally configured addressing scheme. Continue reading

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Cisco ACI Tutorial 4 – The Access Policy Chain – a new “interface range” command

The Access Policy Chain – a new “interface range” command Cisco ACI Tutorial – Part 4 Since you no longer have to configure ports on individual switches, but rather configure multiple ports on multiple switches from a central controller, some … Continue reading

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Cisco ACI Tutorial 3 – Sing a new song for sorting server groups and policy

Sing a new song for sorting server groups and policy Cisco ACI Tutorial – Part 3 If you have been responsible for defining groups of servers and devices to which policy can be applied, you have probably used structures called Access … Continue reading

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Cisco ACI Tutorial 2 – Goodbye to VLANs. Well… not quite

I almost always avoid using the Wizard steps because Wizards are magical creatures that are particularly good at hiding information. Continue reading

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Cisco ACI Tutorial – A Configuration Guide

Cisco ACI Tutorial – A Configuration Guide Cisco ACI Tutorial – Part 1 Note: This is the first of a series of at least eight blog posts that I plan to publish over the coming weeks. Make sure you follow … Continue reading

Posted in ACI, ACI configuration, ACI Configuration Tutorial Series#1, ACI Tutorial, Cisco, configuration tutorial, Data Center, Data Centre, Nexus, Nexus 9000, SDN, Software Defined Networking, tutorial | Tagged , , , , , , , , , , , , | 3 Comments