What is a Layer 2 stretch?
With a stretch Layer 2, the link between the two sites (often 10 Gbit) can plug right into the switches, which allows for a very simple design. With VXLAN/NVGRE, multiple links can be used and disparate paths can be available, but normally the only devices that support it are the firewall/router.
What is VLAN stretching?
A stretched VLAN is a VLAN that spans multiple physical data centers. In a typical multisite data center environment, locations are connected over a Layer 3 WAN. This is the simplest configuration that removes a lot of complex considerations from the environment.
What is network stretching?
Stretch is the difference between the best possible path through the network and the actual path the traffic takes through the network. For instance, if the shortest actual path available is 2 hops, but the traffic is following a 3 hop path, the stretch is 1.
What is difference between VLAN and Vxlan?
VxLAN vs. VLAN. The main difference is that VLAN uses the tag on the layer 2 frame for encapsulation and can scale up to 4000 VLANs. VXLAN, on the other hand, encapsulates the MAC in UDP and is capable of scaling up to 16 million VxLAN segments.
What is the difference between OTV and VXLAN?
Well VXLAN is extending the VLANs or layer 2 traffic within the datacenter while OTV is the extension of the layer 2 Traffic across the datacenter. Although the concept is same taking the Layer 2 traffic over IP networks.
What does Overlay transport virtualization ( OTV ) mean?
Overlay Transport Virtualization (OTV) is an IP-based functionality that has been designed from the ground up to provide Layer 2 extension capabilities over any transport infrastructure: Layer 2 based, Layer 3 based, IP switched, label switched, and so on.
What are the names of Layer 2 extensions?
Taking a VLAN and extending that broadcast domain across two sites can be identified by many names including; Data Center Interconnect (DCI), Data Center Extension (DCE), Extended Layer 2 Network, Stretched Layer 2 Network, Stretched VLAN, Extended VLAN, Stretched Deploy, Layer 2 VPN.
How does layer 2 work in a datacenter?
The L2C may now listen and receive traffic for VM’s that are located within the vCloud Air environment. When stretching a Layer 2 network to vCloud Air, attached machines will rely on the local datacenter’s edge router for all routing actions as well as for firewall protection.
How does A L2C work in a data center?
A L2C can stretch existing VLAN or VXLAN port groups from the on-premises data center to vCloud Air by truncating networks on either side, and creating a secure tunnel end to end to protect and pass VM network traffic.