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BUILDING REMOTE ACCESS NETWORKS phần 3

mở rộng cơ hội nghề nghiệp của bạn, và nâng cao kinh nghiệm của bạn của cuộc cách mạng Internet.Các hình mẫu cho các PRI. Tại Bắc Mỹ và Nhật Bản, cấu hình được ghi nhận như là , hoặc 23 kênh và một trong hoạt động . Tỷ lệ bit của loại hình này PRI là . | Using PPP To Provide Remote Network Access Chapter 3 97 When multiple Cisco access servers are configured using MMP the grouping is referred to as a stack group. Supported interfaces for MPP are PRI BRI Serial and Asynchronous. MMP requires that each associated router be configured with the following parameters PPP Stack Group Bidding Protocol SGBP -A protocol for arbitrating the location of bundles within a stack group to the highest bidder normally the stack group member that locates the initial bundle for the first link in a multilink connection MP Virtual template for interface cloning Simple stack groups are composed of member peer routers and do not need to have a permanent lead router. Any stack group member who answers an incoming call becomes the owner of the call if it is the first call in a new session with the particular remote-end device. When a second call comes in from this same remote-end device to the stack group the answering router will forward the call to the stack group where the member routers will bid for the call. Since the first router owns the session by answering the first call it will win the bid and the answering router will forward the call to it. Figure 3.12 MMP configuration using routers. www.syngress.com 98 Chapter 3 Using PPP To Provide Remote Network Access The second router accomplishes this by establishing a tunnel to the owner router and forwarding all packets to the owner. The owner router is responsible for reassembling and resequencing the packets. The owner router then forwards these packets on to the local network. There are two basic steps to configuring MMP on Cisco routers and access servers Step 1 Configure the stack group and make member assignments. 1. Create the stack group on the first router to be configured where name is the hostname of that router. sgbp group group_name 2. Add additional stack group members. sgbp member router2_hostname router2_ip_address sgbp member router3_hostname router3_ip_address add .