临沂广电IP核心网络规划与设备选型

临沂广电分步建设IP网络,认为前期在没有用户的情况下建设IP城域网络及其BRAS等投资浪费严重,所以尝试分期建设网络,一期集中部署两台BRAS,所有市区及县区分前端OLT直接上联至中心BRAS设备。充分利用BRAS设备的二层隔离及其PON设备的隔离特性,减少接入层的二层网络覆盖,以减少VLAN的数量降低维护成本。考虑到大客户发展的不明确性,一期不建设SR路由器,其功能暂时由BRAS来代替,同时探讨了基于上述思路的设备选型问题。

Linyi Broadcast Television IP Core Network Planning and Selection of Equipment

Linyi broadcast television IP network construction step by step, that early in the no user case con- struction IP metropolitan area network BRAS, investment is wasteful serious, so we try to build in installment network approaches, a centralized deployment of two BRAS, all city to distinguish between front-end OLT di- rectly connected to BRAS equipment center. Make full use of BRAS equipment PON equipment layer two iso- lation, isolation, reducing the access layer to the two layer of network coverage, decreasing the number of VLAN reduces maintenance costs. Considering the large customer development uncertainty, for a period of not building the SR router, temporarily by BRAS instead of its function, it based on the above idea behind our BRAS, firewall other equipment ion considerations.