• Proceedings of the IEEK Conference
• /
• 2000.07a
• /
• pp.533-536
• /
• 2000

In this paper, we proposed high performance packet forwarding engine for asynchronous transfer mode(ATM) based gigabit routers. The forwarding engine is based on ATM switch and accommodates four 622Mbps ports. The forwarding engine has been designed to be able to process the Intemet protocol(IP) packet at 2.5Gbps using the pipelined If header processing and lookup control mechanism. For high performance packet forwarding, we used content addressable memory(CAM) based routing coprocessor operating in hardware and implemented the pipelined lookup control function into a field programmable gate array(FPGA). The pipelined packet header processing mechanism enhanced the forwarding performance of the If packets ingressed from four different 622Mbps ports. Moreover, the If lookup controller designed to have the performance up to 12.5Mpps. The proposed forwarding engine is also designed to support differentiated services(DS) and multiprotocol label switching(MPLS).

• Journal of KIISE:Computing Practices and Letters
• /
• v.9 no.4
• /
• pp.447-454
• /
• 2003

The forwarding enging, which handles the incoming frames and forwards them to the appropriate outgoing interface, is the crucial factor of the router´s performance. As the MPLS label edge router provides the facility that it is capable of interworking with various kinds of networks, the forwarding engine should have the flexibility processing the corresponding types of frames from such network interfaces. In order to support the flexibility, we implement the forwarding engine for the MPLS LER with ATM interfaces based on the programmable Ethernet packet processor. By exploiting instinct loop-back functionality of Ethernet packet processor, our forwarding engine handles and forwards the frames from/to ATM interfaces. The performance of our forwarding engine is evaluated by experiments on the effect of looping frames back and the number of Ethernet packet processor´s instructions.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.27 no.11C
• /
• pp.1171-1177
• /
• 2002

In this paper, we proposed a high speed IP(Internet Protocol) packet forwarding engine of ATM(Asynchronous Transfer Mode) based label edge routers for POS(Packet over SONET) interface. The forwarding engine uses TCAM(Ternary Content Addressable Memory) for high performance lookup processing of the packet received from POS interface. We have accomplished high speed IP packet forwarding in hardware by implementing the functions of high speed IP header Processing and lookup control into FPGA(Field Programmable Gate Array). The proposed forwarding engine has the functions of label edge routers as the lookup controller supports MPLS(Multiprotocol Label Switching) packet processing functionality.

• IE interfaces
• /
• v.14 no.3
• /
• pp.263-271
• /
• 2001

MPLS LER is located at the boundary of MPLS domain as an ingress or an egress router and plays a role in connecting with the existing Internet. Among the components of the MPLS LER, forwarding engine(FE) is a key device which assigns a label to an IP packet by analyzing the destination address of its header in order to enter the MPLS domain, or restructures the cells from MPLS domain into IP packet by reversely processing. In this paper, we investigate the design of FE by analyzing the traffic performance of its components and estimate the IP packet processing capacity of a FE using queueing model and simulation. It is found that the maximum IP packet processing capacity of the Forwarding Engine is about 150,000 packets/sec.

• Proceedings of the IEEK Conference
• /
• 2002.07c
• /
• pp.1855-1858
• /
• 2002

A number of MPLS ATM systems have been proposed to increase the access speed of current routers, which only support the best-effort service. However, the MPLS ATM systems have to support the so-called differential service, which discriminates the applications according to the service class because they do not be satisfied the Internet users who use diverse applications. In this paper, to support this differential service a detailed forwarding procedure based on a LSP control method and an application-based marking algorithm is suggested. The LSP control method establishes several different LSPs for each FEC according to the service class and the application-based marking algorithm chooses a proper differential service depending on the application category. Also, a design scheme of forwarding engine, which can be easily implemented with a minimum modification of existing MPLS ATM systems is proposed. And, the best simulation result of high priority application category is gained when the proposed forwarding algorithm is comparedwithexistingalgorithms.

• Proceedings of the Korean Information Science Society Conference
• /
• 2001.04a
• /
• pp.409-411
• /
• 2001

기존의 인터넷 망은 대부분 최선형 서비스를 지원하고 있어 다양한 서비스 품질을 요구하는 사용자의 요구를 만족시키기에는 어려움이 있었으며, 이러한 문제점을 해결하기 위해서 ATM 스위치 기반의 MPLS 망이 구상되었다. ATM 스위치를 기반으로 하는 MPLS 망은 기존 ATM 망에 간단한 L3 라우팅 모듈을 추가하여 인터넷 서비스의 제공이 가능하고, 사용자에게 다양한 서비스 레벨을 지원 할 수 있다는 장점이 있다. 본 논문에서는 MPLS 시스템에서 IP 주소 Lookup을 위한 Forwarding Engine에 대한 큐잉 모델을 설정하고, 인터넷에서 사용되는 프로토콜들에 대한 통계적인 분석을 수행하여, 트래픽 부하에 따른 Forwarding Engine의 성능을 분석하였다.

• The KIPS Transactions:PartC
• /
• v.9C no.1
• /
• pp.55-64
• /
• 2002

A number of MPLS ATM systems have been proposed to increase the access speed of current rooters, which only support the beat-effort service. However, the MPLS ATM systems have to support the so-called differential service, which discriminates the applications according to the servile clads because they do not be satisfied the Internet users who use diverse applications. In this paper, to support this differential service a detailed forwarding procedure based on a LSP control method and an application-based marking algorithm is suggested. The LSP control method establishes several different LSPs for each FEC according to the service class and the application-based marking algorithm chooses a proper differential service depending on the application category. Also, a design scheme of forwarding engine, which can be easily implemented with a minimum modification of existing MPLS ATM systems is proposed. And, the best simulation result of high priority application category is gained when the proposed forwarding algorithm is compared with existing algorithms.

• The KIPS Transactions:PartC
• /
• v.9C no.6
• /
• pp.903-910
• /
• 2002

As the edge router provides the facility that it is capable of interworking with various kinds of networks, the forwarding engine should have the flexibility processing the corresponding types of frames from such network interfaces. In order to support the flexibility, we design and implement a prototype of edge router with ATM and Ethernet interfaces based on the programmable Ethernet packet processor Our forwarding engine handles and forwards the frames from ATM interfaces by using loop-back functionality of Ethernet packet processor. The performance of our edge router is evaluated by experiments throughout its performance of forwarding engine and tested by interworking with another kinds of routers.

• Journal of the Institute of Electronics Engineers of Korea TC
• /
• v.42 no.5 s.335
• /
• pp.23-28
• /
• 2005

Recently, new concept, NP(Network Processor) was emerged into communication systems to cope with the various service requirements from Internet users. NP is an unique promising technique to capable of implementing of the packet processing in wire-speed and providing the flexibility for supporting the newly network services, having satisfied with implementation using hardware and software respectively in past, This paper deals with the implementation techniques and evaluation results of the line card capable to do packet forwarding function with packet processing power of wire-speed and applicable to various physical interfaces. There are several interfaces of POS, Gigabit ethernet and EPON in E-OLT(EPON Optical Line Terminal) system of PATH(Photonic Access To Home) network. Therefore, the E-OLT's packet forwarding engine have to support various subscriber's interface in wire speed. Our system is implemented the subscriber's card in daughter board and the setup procedure is done by system firmware based on the module's identifier acquired from installed physical board.

• Proceedings of the Korea Contents Association Conference
• /
• 2003.11a
• /
• pp.227-233
• /
• 2003

In paper, we present design and implementation of MPLS based VPN with QoS capabilities. We propose a design architecture of an edge router for MPLS based VPN with QoS capabilities in backbone network. We design functional blocks, interface specifications, detail routing and forwarding information based structure, and packet forwarding engine for the purpose of implementation of an edge router, We extend bgp-4 software for implementation differentiated service packet forwarding schemes in MPLS based VPN.