MPLS Implementation of ZXR10 Core Router

MPLS is developed to support IP service on ATM, and is also a type of IP address exchange. Core Routers generally adopt exchange technology. What is the significance of introducing MPLS to core routers? MPLS enables fast switching, QoS, traffic engineering, VPN, and link protection. This article introduces the MPLS solution of ZTE ZXR10. -- Editor
MPLS Multi-Protocol Label Switching (MPLS) is a method that supports IP service and IP address switching in the middle and late 1990s S. MPLS networks are composed of edge device LER marking and switching edge routers that Implement MPLS-related Protocols) and core device LSR marking and switching routers. Server, LSR, and client devices run common routing protocols, including RIP, OSPF, and BGP. Use certain rules, such as distinguishing different information flows on the network based on the source and target addresses, and defining them as a FEC Forwarding Equivalence Class) to mark and allocate FEC. MPLS networks establish a link LSP to mark the switching path before data interaction), classify different data streams by marking a fixed length of 20 digits), and exchange the data accordingly. Because the tag length is fixed and the number of digits is small, the core network structure is simplified while the switching efficiency is improved.
The core problem of MPLS implementation is to mark how to add it to the message for exchange. The MPLS implementation on the core router is different from that on the ATM. Specifically, a shim field is inserted between the data link layer header and the network layer header, including a 20-Bit Flag and some other feature fields. It is mainly used to encapsulate the labels at the Ethernet frame and PPP link layer. The MPLS port performs fast exchange based on the LABEL of the received message through the lookup forwarding table.
Tag allocation is implemented through the LDP tag Distribution Protocol). You can allocate tags based on different policies and generate forwarding tables for each interface. To achieve the quality of service, Traffic Engineering and interconnection with other devices, MPLS implementation generally also supports the expansion of related routing protocols, support for CR-LDP and RSVP protocols.
The ZXR10 core router implements all relevant protocols. ZXR10 MPLS also implements other functions, including:
1. MPLS Fast Reroute function. When a node or link on the LSP fails, the node or link is automatically switched to the new LSP to ensure that the network service is not interrupted.
2. Implement traffic engineering TE ). Through the CR-LDP to set the relevant nodes, through the traffic detection, determine the situation of traffic distribution. Based on how to determine the shunting link method, you can differentiate between loose and precise settings.
3. Virtual Private Network VPN. VPN implements an internal network of a unit through a public network. Due to the relationship between service traffic and network coverage, the early network was implemented through a leased line, which lacked flexibility. When IP networks are widely used, VPN is directly supported by network devices. Because of the encapsulation of LSP, MPLS can implement leased line features to ensure security, without the need to implement complex encryption algorithms. It also provides excellent flexibility and scalability.
4. implement IP QoS. It is implemented by setting related features for LSP and can be combined with Diff-serv.
5. Support for multicast.
The MPLS Implementation of ZXR10 has been tested by carriers and independent detection agencies, including functions, performance, protocol consistency, and interconnection with devices of other manufacturers, relevant functions and network services will be activated on the actual network.