So, now we have external connectivity fully working, lets have a look at a failure scenario and how we can put some config in to resolve. Lets take a look at the topology: The issue In the event that a leaf looses all its uplinks to the spines, or a Read more…
So, now we have external connectivity working, but there is a certain scenario where it breaks. Lets take a look at the topology: The issue If we were on either server-3-vl10 or server-4-vl20 and the LACP hashing decided to forward traffic towards LEAF-3, what would happen if the connection between Read more…
In the last part, we got route leaking in tenant VRFs working, in this part, we will look at giving the VRFs a way out of the Fabric! We have added some new devices to the topology: We can see the addition of the palo alto firewall that is connected Read more…
In the last part, we got a multiple tenant VRFs working, in this part, we will look at joining the tenants up via route leaking. Lets remind ourselves of the topology: So, currently we have our two VRFs with separate routing tables for vlan 10 and vlan 20: LEAF-1# show Read more…
In the last part, we got a single tenant VRF working, in this part, we will look at splitting vlan 20 off into its own separate Tenant to show a multi-tenant setup. Lets remind ourselves of the topology: I have added more servers into the topology since last time to Read more…
In this part we are going to look at the L3VNI config to get the hosts in the two vlans talking to each other. Lets remind ourselves of the topology: All of the configuration below is for the Leaves in the topology. Vlan Configuration Firstly, we need to configure a Read more…
In this part we are going to look at the anycast gateway setup of the topology. This will help get the servers off their local network. Lets remind ourselves of the topology: The layout itself hasn’t changed. However, server3 has been moved onto Vlan20 so we can show routing using Read more…
In this part we are going to look at the L2VNI setup of the topology. This is basically the VLAN setup of the topology where we can define the vlans in use. Lets remind ourselves of the topology: The L2VNI setup is isolated to the leaves as the spines are Read more…
In this part we are going to look at the EVPN overlay setup of the topology. This allows the sharing of the layer 2 information learnt at each leaf switch. For this, we will use BGP. Lets remind ourselves of the topology: The BGP setup will have the spines as Read more…
In the last part, we setup the vPC domains on the leaf switches and all the interfaces down to our vPC member servers. In this part, we are going to look at the underlay setup. There aren’t many differences from a traditional VXLAN deployment, but lets dive in! Here is Read more…