[cắt giảm sản lượng] 5 tuyến đường Tổng IPX. Lên đến 2 con đường song song và 16 hop được cho phép. cắt giảm sản lượng hiển thị IPX tuyến đường lệnh cho thấy hai con đường song song được hỗ cho thấy lưu lượng truy cập IPX cung cấp cho bạn một bản tóm tắt về số lượng và | Frame Relay 491 7. The CO receives the frame and sends it through the Frame Relay cloud to its destination. This cloud can be dozens of switching offices or more It looks for the destination IP address and DLCI number. It typically can find the DLCI number of the remote device or router by looking up an IP-to-DLCI mapping. Frame Relay mappings are usually created statically by the service provider but they can be created dynamically using the Inverse ARP IARP protocol. Remember that before data is sent through the cloud the virtual circuit is created from end to end. 8. Once the frame reaches the switching office closest to the destination office it is sent through the local loop. The frame is received at the demarc and then is sent to the CSU DSU. Finally the router extracts the packet or datagram from the frame and puts the packet in a new LAN frame to be delivered to the destination host. The frame on the LAN will have the final destination hardware address in the header. This was found in the router s ARP cache or an ARP broadcast was performed. Whew The user and server do not need to know nor should they know everything that happens as the frame makes its way across the Frame Relay network. The remote server should be as easy to use as a locally connected resource. Frame Relay Encapsulation When configuring Frame Relay on Cisco routers you need to specify it as an encapsulation on serial interfaces. There are only two encapsulation types Cisco and IETF Internet Engineering Task Force . The following router output shows the two different encapsulation methods when choosing Frame Relay on your Cisco router RouterA config int s0 RouterA config-if encapsulation frame-relay ietf Use RFC1490 encapsulation cr The default encapsulation is Cisco unless you manually type in IETF and Cisco is the type used when connecting two Cisco devices. You d opt for the IETF-type encapsulation if you needed to connect a Cisco device to a Copyright 2000 SYBEX Inc. Alameda CA .
