邮政电子汇兑系统网络技术的研究与实现
摘要
本论文在邮政电子汇兑系统的网络实现的技术上具有较大的实用价值，应用网络技术的研究成果给实践以指导，使得该具有实际意义的系统得以实现。
在邮政电子汇兑系统的网络工程实现中，为了尽量利用已经存在的绿卡网络和综合网络线路，减少线路费用支出，提高汇兑资金的利用率，推动邮政综合网络的应用进程，作者提出了多路复用技术和两网隔离技术，利用虚电路(或隧道)技术及虚拟路由技术实现绿卡信号与电子汇兑信号的隔离，使得降低电子汇兑网络系统投资成本成为可能。
特别是在此网络工程实现中选择应用OSPF技术成为最为关键的问题，因为一个数据包从源站点有效可靠地传输到目的站点，就必须选择一条最佳传输路径，即最佳路由算法，而OSPF技术是现阶段大型网络必须采用的核心技术，因此在本论文中作者对OSPF技术做了非常详尽的研究和探讨，并在OSPF技术具体实现中给出了难点以及相应的解决方法，特别地在减少路由表的计算次数上给出了具体的实现算法，在实践中得到使用并取得良好的效果。最后本文定性地提出了一种基于QoS的OSPF扩展算法，从几方面给以了讨论，对以后OSPF的发展有一定的参考价值。论文通过对路由技术的仔细研究，提出可行性算法，并在实践中应用，使得该电子汇兑系统在同行业中成为比较可靠和有效的先进工程。
This document has more practical value in postal electric exchange system networks technology, applys networks technologic studying results to direct practice. It makes the practical sense system to accomplish.
In the electric exchange networks system, to make full use of the existed green card and comprehensive network circuit, bring down the fee of network circuit, enhancing the utilization of exchanging fund, driving the appliance process, author alleges multiplex technology and both networks isolation technology, using virtual circuit (or says tunneling) technology and virtual router technology to make green card signal and electric exchange signal isolating .Make it possible to reduce the investing cost.
Especially OSPF technology is the key in the networks engineering .because a data package is transmitted from source site to aim, we must change the best transmitting path, that is the best route algorithm, and OSPF technology is a core technology in a big network nowdays. So author study very hard on OSPF technology in the paper, and give the problem and answer, exceptionally I give the concrete algorithm in reducing counters on route table, and get a good result in practice. Last author give a expanding algorithm of OSPF about QoS qualitively under a few ways, there is a reference value in OSPF advancing. The paper has gave the practicability algorithm and applied it with studying in earn, making the exchange system to be reliable and effective engineering in post.
在邮政电子汇兑系统的网络工程实现中，为了尽量利用已经存在的绿卡网络和综合网络线路，减少线路费用支出，提高汇兑资金的利用率，推动邮政综合网络的应用进程，作者提出了多路复用技术和两网隔离技术，利用虚电路(或隧道)技术及虚拟路由技术实现绿卡信号与电子汇兑信号的隔离，使得降低电子汇兑网络系统投资成本成为可能。
特别是在此网络工程实现中选择应用OSPF技术成为最为关键的问题，因为一个数据包从源站点有效可靠地传输到目的站点，就必须选择一条最佳传输路径，即最佳路由算法，而OSPF技术是现阶段大型网络必须采用的核心技术，因此在本论文中作者对OSPF技术做了非常详尽的研究和探讨，并在OSPF技术具体实现中给出了难点以及相应的解决方法，特别地在减少路由表的计算次数上给出了具体的实现算法，在实践中得到使用并取得良好的效果。最后本文定性地提出了一种基于QoS的OSPF扩展算法，从几方面给以了讨论，对以后OSPF的发展有一定的参考价值。论文通过对路由技术的仔细研究，提出可行性算法，并在实践中应用，使得该电子汇兑系统在同行业中成为比较可靠和有效的先进工程。
This document has more practical value in postal electric exchange system networks technology, applys networks technologic studying results to direct practice. It makes the practical sense system to accomplish.
In the electric exchange networks system, to make full use of the existed green card and comprehensive network circuit, bring down the fee of network circuit, enhancing the utilization of exchanging fund, driving the appliance process, author alleges multiplex technology and both networks isolation technology, using virtual circuit (or says tunneling) technology and virtual router technology to make green card signal and electric exchange signal isolating .Make it possible to reduce the investing cost.
Especially OSPF technology is the key in the networks engineering .because a data package is transmitted from source site to aim, we must change the best transmitting path, that is the best route algorithm, and OSPF technology is a core technology in a big network nowdays. So author study very hard on OSPF technology in the paper, and give the problem and answer, exceptionally I give the concrete algorithm in reducing counters on route table, and get a good result in practice. Last author give a expanding algorithm of OSPF about QoS qualitively under a few ways, there is a reference value in OSPF advancing. The paper has gave the practicability algorithm and applied it with studying in earn, making the exchange system to be reliable and effective engineering in post.
引文
[1] 原国家邮电1995年12月颁布的《国内邮政汇兑业务处理规则》人民邮电出版社
[2] 国家邮政局2001年2月编制的《邮政电子汇兑系统工程建设计划(草稿)》
[3] 国家邮政局2001年2月编制的《邮政电子汇兑系统工程时间安排表》
[4] 国家邮政局2001年2月编制的《邮政电子汇兑系统切换方案(讨论稿)》
[5] 原邮电部邮政总局1998年1月颁发的《全国邮政综合计算机网业务技术体制》
[6] 河南省信息中心提供的《郑州市电子汇兑连联网方案》
[7] 《河南省邮政局电子汇兑路由器培训教材》北京万林克通信技术有限公司 2001年5月
[8] 翁亮、陈依群、诸鸿文 虚拟专用网络技术 《通信技术》1999年4期 P43—P46
[9] Andrew S．Tanenbaum著．Computer Networks．THIRD EDITION．熊桂喜 王小虎译．清华大学出版社，1998年
[10] 周明天 汪文勇著．《TCP/IP网络原理与技术》清华大学出版社1998年
[11] Andrew Bruce Caslow(CCIE), Valeriy Pavlichenko(CCIE)著．Cisco Certification: Bridges, Routers, and Switchs for CCIEs．苏金树，胡光明，郑静，韦远明等译，机械工业出版社，2000年
[12] J. Moy, OSPF Version 2, Internet Request for Comment, RFC 2328, April1998．
[13] Douglas E．Comer著．用TCP/IP进行网际互连 第1卷：原理、协议和体系结构．第3版．林瑶 蒋慧 杜蔚轩 等译．北京：电子工业出版社，1998年
[14] Terry Slattery, William Burton著．Cisco网络高级IP路由技术．苏金树等译．机械工业出版社，1999年6月
[15] Christian Huitema著．因特网路由技术．陶文星译．北京：清华大学出版社，1998年
[16] J. Moy, OSPF Database Overflow, Internet Request for Comment, RFC 1765, March 1995
[17] F. Baker, R. Coltun, OSPF Version 2 Management Information Base, Internet Request for Comment, RFC 1850, November 1995.
[18] Alex Zinin, Guidelines for Efficient LSA Refreshment in OSPF, draft-ietf-ospf-refresh-guide-01. txt, work in progress.
[19] Alex Zinin, Acee Lindem, Derek Yeung, Alternative OSPF ABR Implementations, draft-ietf-ospf-abr-alt-03. txt, work in progress.
[20] J. Yu, Scalable Routing Design Principles, Internet Request for Comment, RFC 2791, July 2000.
[21] Alvaro Retana, Alex Zinin, Danny McPherson, OSPF Stub Router Advertisement, draft-ietf-ospf-stub-adv-02. txt, work in progress.
[22] R. Coltun, V. Fuller, The OSPF NSSA Option, Internet Request for Comment, RFC 1587, March 1994.
[23] J. Moy, Extending OSPF to Support Demand Circuits, Internet Request for Comment, RFC 1793, April 1995
[24] J. Moy, Multicast Extensions to OSPF, RFC 1584, March 1994.
[25] Dave Katz, Derek Yeung, Traffic Engineering Extensions to OSPF, draft-katz-yeung-ospf-traffic-03.txt, work in progress.
[26] Senthil Venkatachalam, Ben Abarbanel, OSPF Extensions to Support Inter-Area Traffic Engineering, raft-venkatachalam-ospf-traffic-00.txt, work in progress.
[27] J. Moy, Flooding over parallel point-to-point links, draft-ietf-ospf-ppp-flood-00.txt, work in progress.
[28] R. Coltun, The OSPF Opaque LSA Option, RFC 2370, July 1998.
[29] R. Coltun, The OSPF Opaque LSA Option, Internet Request for Comment, RFC 2370, July 1998.
[30] R. Coltun, D. Ferguson, J. Moy, OSPF for IPv6, RFC 2740, December 1999.
[31] Thomas A．Maufer著．IP技术基础编址和路由．赵军锁 李志等译，机械工业出版社，2000年
[32] Don Slice，Russ White著，网络核心技术内幕-专业IP网络规划与设计．希望图书创作室译．北京希望电子出版社，2000年．
[33] Khalid．Raga，Mark．Tuner著，网络核心技术内幕-综合IP网络设计解决方案．希望图书创作室译．北京希望电子出版社，2000年．
[34] E. Crawley, R. Nair, B. Rajagopalan, H. Sandick, A Framework for QoS-based Routing in the Internet, Internet Request for Comment, RFC 2386, August 1998.
[35] G. Apostolopoulos, D. Williams, R. Guerin, S. Kamat, A. Orda, T. Przygienda, QoS Routing Mechanisms and OSPF Extensions,Internet Request for Comment, RFC 2676, August 1999.
[2] 国家邮政局2001年2月编制的《邮政电子汇兑系统工程建设计划(草稿)》
[3] 国家邮政局2001年2月编制的《邮政电子汇兑系统工程时间安排表》
[4] 国家邮政局2001年2月编制的《邮政电子汇兑系统切换方案(讨论稿)》
[5] 原邮电部邮政总局1998年1月颁发的《全国邮政综合计算机网业务技术体制》
[6] 河南省信息中心提供的《郑州市电子汇兑连联网方案》
[7] 《河南省邮政局电子汇兑路由器培训教材》北京万林克通信技术有限公司 2001年5月
[8] 翁亮、陈依群、诸鸿文 虚拟专用网络技术 《通信技术》1999年4期 P43—P46
[9] Andrew S．Tanenbaum著．Computer Networks．THIRD EDITION．熊桂喜 王小虎译．清华大学出版社，1998年
[10] 周明天 汪文勇著．《TCP/IP网络原理与技术》清华大学出版社1998年
[11] Andrew Bruce Caslow(CCIE), Valeriy Pavlichenko(CCIE)著．Cisco Certification: Bridges, Routers, and Switchs for CCIEs．苏金树，胡光明，郑静，韦远明等译，机械工业出版社，2000年
[12] J. Moy, OSPF Version 2, Internet Request for Comment, RFC 2328, April1998．
[13] Douglas E．Comer著．用TCP/IP进行网际互连 第1卷：原理、协议和体系结构．第3版．林瑶 蒋慧 杜蔚轩 等译．北京：电子工业出版社，1998年
[14] Terry Slattery, William Burton著．Cisco网络高级IP路由技术．苏金树等译．机械工业出版社，1999年6月
[15] Christian Huitema著．因特网路由技术．陶文星译．北京：清华大学出版社，1998年
[16] J. Moy, OSPF Database Overflow, Internet Request for Comment, RFC 1765, March 1995
[17] F. Baker, R. Coltun, OSPF Version 2 Management Information Base, Internet Request for Comment, RFC 1850, November 1995.
[18] Alex Zinin, Guidelines for Efficient LSA Refreshment in OSPF, draft-ietf-ospf-refresh-guide-01. txt, work in progress.
[19] Alex Zinin, Acee Lindem, Derek Yeung, Alternative OSPF ABR Implementations, draft-ietf-ospf-abr-alt-03. txt, work in progress.
[20] J. Yu, Scalable Routing Design Principles, Internet Request for Comment, RFC 2791, July 2000.
[21] Alvaro Retana, Alex Zinin, Danny McPherson, OSPF Stub Router Advertisement, draft-ietf-ospf-stub-adv-02. txt, work in progress.
[22] R. Coltun, V. Fuller, The OSPF NSSA Option, Internet Request for Comment, RFC 1587, March 1994.
[23] J. Moy, Extending OSPF to Support Demand Circuits, Internet Request for Comment, RFC 1793, April 1995
[24] J. Moy, Multicast Extensions to OSPF, RFC 1584, March 1994.
[25] Dave Katz, Derek Yeung, Traffic Engineering Extensions to OSPF, draft-katz-yeung-ospf-traffic-03.txt, work in progress.
[26] Senthil Venkatachalam, Ben Abarbanel, OSPF Extensions to Support Inter-Area Traffic Engineering, raft-venkatachalam-ospf-traffic-00.txt, work in progress.
[27] J. Moy, Flooding over parallel point-to-point links, draft-ietf-ospf-ppp-flood-00.txt, work in progress.
[28] R. Coltun, The OSPF Opaque LSA Option, RFC 2370, July 1998.
[29] R. Coltun, The OSPF Opaque LSA Option, Internet Request for Comment, RFC 2370, July 1998.
[30] R. Coltun, D. Ferguson, J. Moy, OSPF for IPv6, RFC 2740, December 1999.
[31] Thomas A．Maufer著．IP技术基础编址和路由．赵军锁 李志等译，机械工业出版社，2000年
[32] Don Slice，Russ White著，网络核心技术内幕-专业IP网络规划与设计．希望图书创作室译．北京希望电子出版社，2000年．
[33] Khalid．Raga，Mark．Tuner著，网络核心技术内幕-综合IP网络设计解决方案．希望图书创作室译．北京希望电子出版社，2000年．
[34] E. Crawley, R. Nair, B. Rajagopalan, H. Sandick, A Framework for QoS-based Routing in the Internet, Internet Request for Comment, RFC 2386, August 1998.
[35] G. Apostolopoulos, D. Williams, R. Guerin, S. Kamat, A. Orda, T. Przygienda, QoS Routing Mechanisms and OSPF Extensions,Internet Request for Comment, RFC 2676, August 1999.