evpn vs vpls

switch connects to the aggregation switch through multi-link bundling. On the one hand, it can completely avoid second-layer loops and make full use of the uplink bandwidth of the access layer. Note that STP should be enabled even in L2 Networks without loops to prevent errors in device configuration and physical link maintenance. At the same time, although the network does not have a loop, STP may still affect the L2 network across multiple data centers. For example, when the network topology

network. The outer label identifies the shared tunnel between PES, and the inner label identifies the VPC connection between CE. Two-layer connections of different VPNs can reuse the same tunnel LSP between PE devices. The inner layer labels are directly advertised between PE devices, making it easy to configure and expand VPN connections. MPLS L2 VPN includes two business models: one is the point-to-point leased line service VLL, and the other is the multi-point to multi-point Virtual Private

Data Center Interconnect-a wider two-tier networkThis chapter introduces the multi-tier network interconnection technology across data centers, including requirements and business models, highlighting traditional vpls scenarios and emerging OTV scenarios.Figure Vpls the Network DiagramThe core device is PE, is responsible for the CE access VPLS networkAt the same

would impact the performance and scalability of existing physical network segments in the data center, and over the WA N, creating design, scalability and operational challenges.Overlay tunnels:since VXLAN is an Overlay tunnel, it adds a layer to the network that must be managed, and creates Operat Ional and scaling challenges. It imposes new end-points, usually a vSwitch, that takes the L2 frames from the VMs, encapsulate them and attaches an IP h Eader. VXLAN creates considerations around wha

(SNMP ). With the gradual expansion of MSTP applications, more and more operators propose to connect low-end MSTP devices to the network management platform of medium and high-end data devices through SNMP for unified management. Obviously, this management only needs to manage the data boards and components in MSTP, and does not need to manage the SDH part in MSTP. 2.2MSTP Interconnection The interconnection of MSTP involves multiple layers. First, at the business level, we need to consider the

desired VPN solution, managing it on behalf of the enterprise, and using the security gateway (Firewall, router, etc) on the user side. 6. division by VPN business level model This is based on the layer at which the VPN service provided by the ISP works (not based on the layer where the tunnel protocol works ). (1) dial-up VPN service (VPDN): This is the VPDN in the first partitioning method (in fact, it is divided by access method, because it is difficult to determine which layer the VPDN belo

final rendering, use the data in [2] and [3] for illumination calculation. There are several tips in this article. The first one is how to quickly generate the RTS. The answer is of course the MRT. I used gl_rgba_float16_ati as the attachment of FBO. Compared with gl_rgba32f_arb, The fp16 format ensures sufficient accuracy. The most important thing is that the hardware can perform gl_linear filtering, while the fp32 hardware only supports nearest filtering. Using two floating point textur

machine, maintenance protocol related database TAD: Transmission Alarm Task TARP: Handling Alarm Information TBULKCLNT:USB plug-in driver management tasks (operating system tasks) TCPKEEPALIVE:TCP Connection Hold Task Tctl: Batch performance capture upload control task TDCACHEUPD: Disk Cache update task (operating system task) Texctask: Exception Handling Task (operating system task) TICK: System Clock Processing Task Tlogtask: Log task (operating system task

about how the specific implementation is within the network. 5. Selection of technologies used for bridging Networks The data center network already has a variety of solutions and protocols that separate network services from data forwarding, such as GRE, NvGRE, VPLS, VxLAN, and MACinIP, and TRILL, SPB and so on. In addition to the basic requirements of the network, we hope that the selected technologies and standards can: 1. simple, convenient, and

QoS. It includes virtual circuit-based VPN (vcvpn) and IP tunneling-based VPN. Divided by Protocol: VPN based on the second-layer service and VPN based on the third-layer tunnel. The second-layer service VPN is composed of a public frame relay or ATM network, it forwards data packets based on the layer-2 addresses of user data packets (such as MAC addresses, dlci of frame relay, and VPI/VCI of ATM) on the second layer of the network, the service provider network is responsible for providing L

OpenContrail, virtual routers work closely with hypervisor to implement Overlay networks by using MPLS over GRE, UDP, or VXLAN. The cross-Data Center Virtualization of penContrail is implemented by using MPLS L3 VPN or EVPN, Which is mature and reliable. OpenContrail vro is similar in concept to the current vSwitch, but it provides routing and higher-level services (replacing vSwitch with vRouter ). OpenContrail architecture: You can see the distrib

competing for the same address possible. (4) Other security protection mechanisms are still valid on IPv6, in addition to the security measures that IPSec and IPv6 themselves are doing. such as: nat-pt (NET address Translate-protocol translate) can provide the same protection as Nat in IPv4; extended ACLs (Access control List) can implement all the security protection provided by the IPv4 ACL on the IPv6. In addition, based on VPLS (Virtual private L

ensure high capacity, high performance and high speed IP bearer network development requirements. With the development of the latest route exchange technology, the traditional test content such as route table capacity test, exchange and forwarding capability test, and even oscillating test cannot meet the test requirements of high capacity, high performance, and function-rich route exchange technology. For example: 1) The combination of OSPF and LDP promotes the development of

network, the same as the t3+ level of the engine room. This year, the Hong Kong engine room has been perfected, the company's research and Development headquarters in Beijing, the service center is located in Chongqing, the company has professional technical staff, proficient in Cantonese, English multi-lingual, to meet the different communication needs of customers at home and abroad, to eliminate foreign server demand for customers language barriers.In particular, the company's high-quality p

requirements of high capacity, high performance, and rich functional routing and exchange equipment. For example: (1) The combination of OSPF and LDP promotes the development of VPLS technology; (2) The integration of ISIS + RSVP + BGP and other protocols promotes the rapid application of L3VPN technology; (3) The combination of OSPF + LDP + PIM + BGP promotes the development and wide application of Multicast VPN technology; (4) Ethernet, FR, ATM, PP

Two sets of juniper data cores to prevent loop occurrence by configuring Mc-lagI. BACKGROUNDThere are two sets of data core switches deployed in two different network rooms, the current state is a single-mode fiber three-layer network interconnection, but the business unit put forward a new network requirements, to build three network segments, gateway to enable the core switch in a-block room, C block room also to use these three network segments, fortunately in the same park, Can be deployed t

Resources Public and private network Cloud resources) A common problem is to ensure the quality of application experience QoE) There will be no huge difference due to resource allocation. A real cloud "resource pool" should be able to serve any user combination application and have QoE comparable to it, which means that all the paths between resources and connections from all users to resources are allowed, has a network connection with good QoS. VPN can be used to connect all cloud components,

the expansion of L2 networks not only close to the boundaries of the data center, you also need to consider extending the data center area to the local backup center and remote disaster recovery center. Generally, the connection between multiple data centers is connected through a route, which is a layer-3 network. To connect two L2 Networks connected through a three-tier network, you must implement "L2 over L3 ". There are also many L2oL3 technologies, such as the traditional

visibility into networked storage, including Ethernet SAN technologies (e.g. FCoE or AoE), that Typica Lly dominates bandwidth usage in the data center. Looking forward, there is a number of tunneling protocols being developed to connect virtual switches, Including:gre, MP LS, VPLS, VXLAN and NVGRE. As new protocols is deployed on the network they is easily monitored without any change to exiting SFlow agents ensuring End-to-end visibility across the

services, including L3 mpls vpn, VPLS, VLL, MCE, and HoPE. The S8500 series products follow the design philosophy of both business and performance. On the one hand, the increase in bandwidth and network scale will promote the performance and capacity of the 10-Gigabit core route switch. On the other hand, the business development requires the 10-Gigabit core route switch to be more intelligent and provide stronger business capabilities. S8500 series