The EVPN introduced the concept of Integrated Routing and Bridging based on EVPN to address inter-subnet communication between VMs which are belong to different VxLAN segments. It is also called inter-VxLAN routing with 2 options; Symmetric IRB and Asymmetric IRB. In the asymmetric IRB we only have the concept of L2VNI. We also have another …
The distributed IP anycast gateway applies the anycast network concept“one to the nearest association.” Anycast is a network addressing and routing implementation in which the data traffic from an endpoint is routed topologically to the closest node in a group of gateways. The function of the Anycast Layer 3 gateway is natively embedded with the …
VXLAN allows us to create a logical topologies in the Data Center for our virtual machines. With VxLAN we are able to create a layer 2 network on top of layer 3 infrastructure. In the Data Centers VMs needs to be deployed in a specific segment of the network. These VMs can be moved from …
VXLAN allows us to create layer 2 networks over layer 3 infrastructure. The VXLAN base use case is to connect two or more layer three network domains and make them look like a common layer two domain. In the Data center environment this allows virtual machines on different networks to communicate as if they were …
Segment Routing Flexible Algorithm (Flex-Algo) will provide easy way of calculating different paths with different type of constraints. It will allow us to define our own algorithm. This new algorithm can still be minimizing IGP metric but it can also be minimizing TE metric, minimizing delay metric (new metric definition added to IGP), avoiding some links or …
An SR Policy is used to instantiate an ordered list of segments. SR policy is identified with tuple; Head-end, color and End-point. The Head-end is the node where the policy is implemented. It may be an IPv4 or IPv6 address. The End-point indicates the destination of the policy. The endpoint is specified as an IPv4 …
In the IGP based IP networks we have one simple algorithm and it calculates the shortest path to the destination according to planned IGP metric.IGP metric is the only constraint we can assign to the links. We have more with MPLS TE implementations like TE Metric, link admin group, bw etc. The problem with TE, …
When BGP is used to distribute a specific route, it can also be used to distribute an MPLS label which is mapped to that route (Labeled BGP). Label distribution can be in the BGP Update message by using the BGP-4 Multiprotocol SAFI 4. It is used to indicate that the NLRI contains a label. Recall that …