ISP Technologies for 2021



SD-WAN

 https://en.wikipedia.org/wiki/SD-WAN

-- virtualizes WAN functions using software, 

--- supports  MPLS, Last Mile Fiber Optic Network, 4G LTE and 5G.

VXLAN

https://en.wikipedia.org/wiki/Virtual_Extensible_LAN

 It uses a VLAN-like encapsulation technique to encapsulate OSI layer 2 Ethernet frames within layer 4 UDP datagrams, using 4789 as the default IANA-assigned destination UDP port number.[

The VXLAN specification was originally created by VMware, Arista Networks and Cisco

Other backers of the VXLAN technology include Huawei,[7] Broadcom, Citrix, Pica8, Big Switch Networks, Cumulus Networks, Dell EMC, Ericsson, Mellanox,[8] FreeBSD,[9] OpenBSD,[10] Red Hat,[11] Joyent, and Juniper Networks.

Open VSwitch - supports  VXLAN overlay networks. 


EVPN - Ethernet VPN 

https://en.wikipedia.org/wiki/Ethernet_VPN

 --   technology for carrying layer 2 Ethernet traffic ...over MPLS and  VXLAN.[1][2]

https://www.juniper.net/documentation/en_US/junos/topics/concept/evpns-overview.html

An Ethernet VPN (EVPN) enables you to connect dispersed customer sites using a Layer 2 virtual bridge. As with other types of VPNs, an EVPN consists of customer edge (CE) devices (host, router, or switch) connected to provider edge (PE) routers. The PE routers can include an MPLS edge switch (MES) that acts at the edge of the MPLS infrastructure


EVPN + VXLAN 

https://www.juniper.net/documentation/en_US/junos/topics/concept/evpn-vxlan-data-plane-encapsulation.html



NV  -- Network Virtualization 

https://en.wikipedia.org/wiki/Network_virtualization

Citrix and Vyatta have built a virtual network protocol stack combining Vyatta's routing, firewall, and VPN functions with Citrix's Netscaler load balancer, branch repeater wide area network (WAN) optimization, and secure sockets layer VPN.



Overlay Networks






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