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北京大学深圳研究生院网络升级通知

尊敬的北京大学深圳研究生院校园网用户:

我院校园网于2003年建立并投入使用,现已超过网络基本生命周期。网络技术日新月异,现有网络架构无法支撑校园网络应用的需求。亟需升级改造以适应各种网络应用。

  我院校园网为三层(核心层、汇聚层和接入层)星形网络拓扑结构。主要存在以下问题:

1、接入层架构是基于区域VLAN设计的,存在较严重的广播风暴、ARP病毒、带宽不均衡等问题;

2IP地址基于小子网划分,使地址利用率不高和严重浪费,已不适应未来3-5年内的用户上网需求;

3、校园网的现有设备不支持IPv4/IPv6双栈技术,且网络安全比较薄弱。

经我院信息化办公室与大学城网络中心的共同努力在前期对我院A栋和C栋的升级后运行情况都很稳定。因此信息化办公室经与大学城网络中心沟通后决定将于20127261730对我院所有教室区和宿舍区有线网络进行升级,届时全院有线网络将会中断服务,整个升级过程大概需要2-3个小时,我们将尽可能缩短整个升级时间给您带来的不便。升级期间无线网络(PKUUTSZCMCC)可以正常使用。

 

升级成功后我院所有的IP地址进行了重新分配,因此网络打印机、服务器需要重新获取IP及对终端进行设置才可以进行使用,不能使用打印机的老师请及时联系我们。 

再次感谢您的理解和支持!对由此给您带来的不便,请您谅解。

一、改造目标

  1、优化接入层配置实现PUPV,提高接入层的安全性、稳定性、保证每用户的接入带宽;

  2、重新规划IPv4地址分配,优化IPv4地址使用;

  3、全院网络实现IPv6/IPv4双栈运行;

  4、从接入层直接抑制ARP广播风暴和ARP病毒对整个网络造成的影响

5为方便同学使用各类设备,原802.1x认证方式取消,宿舍区使用Portal认证

二、改造故障风险

因本次升级面大,影响范围广,可能存在如下故障:

  1、用户无法获取IP 地址,无法上网;

  2、静态IP 地址用户设置IP后无法上网;

  3、打印机无法提供共享服务;

  4、实验服务器的静态IP地址将要进行更改设置。

三、联系方式

如果您在网络升级期间如遇紧急情况或者对本次网络改造有任何疑问,请直接联系我们。

电话:2603556526035563

手机:1802870299615815577655(短号:6565

邮箱:its@pkusz.edu.cn

大学城网络中心

信息化办公室

2012721
 


 

 

Dear users of the PKU Shenzhen campus network:

 

Our campus network was set up and put into use in 2003. It has now exceeded its normal life time, which causes network instability and a variety of unexpected problems. Due to the rapid development of network technology and the rapidly expanding needs of users, the existing network infrastructure can no longer ensure the stability of the campus network or meet our future needs. In consequence, the upgrade and transformation of this network is an emergency.

 

The network of Building A and Building C have already been upgraded and proved to be stable. So we decided to upgrade the cable network of teaching, administrative and dormitory areas at 17:30 on July 26, 2012. You will not have cable network access at that moment, but you can use the wireless network (PKU, UTSZ, CMCC).

The network transformation will involve the re-allocation of IP addresses, the re-division of the subnet and network structure changes, using portal authentication in dormitory areas. We ask you for your understanding and support, as well as your collaboration during the reconstruction. We are making every effort to create a stable and fast network environment at PKU Shenzhen.

Some of the problems that may occur include:

1. Users cannot obtain an IP address, have no Internet access;

2. Users have no Internet access when using static IP address; fixed IP address devices don’t work;

3. Impossibility to use shared printers; impossible to access file sharing servers;

4. Laboratories internal networks associated with the existing network need to be adjusted.

 

We apologize in advance for any inconvenience you may incur because of the network reconstruction. Please contact us if you meet any problem or have a comment or suggestion to make: 2603 5565, 2603 5563, 18028702996 or 158 155 77655. You can also send us an email: its@pkusz.edu.cn.

 

 

UTSZ Network Information Center

Information & Technology Office

July 21, 2012