TAILIEUCHUNG - configuring cisco avvid phần 9

Nó cho phép các nhiệm vụ được thực hiện từ xa mà nếu không sẽ phải được thực hiện cục bộ trên các máy chủ Unity. Unity cư trú trên một máy chủ 2000 cho phép một kết nối thiết bị đầu cuối dịch vụ được thực hiện, | 288 Appendix Optimizing Network Performance with Queuing and Compression or later interface processors. Although the VIP2-40 is the minimum required interface processor to run DFWQ it is recommended to deploy VIP2-50s when the aggregate port speed on the VIP exceeds 45 Mbps. In addition distributed Cisco express forwarding dCEF is required to run DWFQ. dCEF provides increased packet routing performance because the entire route forwarding information base FIB is resident on each VIP card. Therefore routing table lookups happen locally on the VIP card without querying the centralized route switch processor. In flow-based DWFQ all traffic flows are equally weighted and guaranteed equal access to the queue. This queuing method guarantees fair access to all traffic streams thus preventing any single flow from monopolizing resources. To enable DWFQ activate fair queuing by enabling IP CEF in global configuration mode and fair-queue under the VIP2 interface configuration. Review the following example version ip cef interface FastEthernet0 0 ip address full-duplex interface Hssi4 0 ip address fair-queue router ospf 100 network area 0 router Optimizing Network Performance with Queuing and Compression Appendix 289 DWFQ also has the following limitations Can be configured only on main interfaces per IOS there is no sub-interface support. Can be configured only on an ATM interface with AAL5SNAP encapsulation. Per IOS there is no support for AAL5MUX or AAL5NLPID encapsulations. Is not supported on any virtual tunnel or Fast EtherChannel interfaces. Cannot be configured in conjunction with RSP-based WFQ PQ or CQ. Priority Queuing PQ PQ provides a granular means for the network administrator to determine which traffic must be queued and serviced first. With priority queuing techniques the network administrator must understand all the traffic flows within the network. .

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