8-4z Set the following parameters for packets with IP precedence 3: lower threshold 20, upper threshold40, and drop probability denominator 15.z Set the exponential factor for the average queue size calculation to 6.Configuration procedure# Enter system view. system-view# Enter interface view.[Sysname] interface gigabitethernet 1/0/1# Enable IP precedence-based WRED.[Sysname-GigabitEthernet1/0/1] qos wred ip-precedence enable# Set the following parameters for packets with IP precedence 3: lower threshold 20, upper threshold 40,and drop probability denominator 15.[Sysname-GigabitEthernet1/0/1] qos wred ip-precedence 3 low-limit 20 high-limit 40discard-probability 15# Set the exponential factor for the average queue size calculation to 6.[Sysname-GigabitEthernet1/0/1] qos wred weighting-constant 6Displaying and Maintaining WREDTo do... Use the command... RemarksDisplay WRED configurationinformation on the interface or allinterfacesdisplay qos wred interface[ interface-typeinterface-number ]Available in any viewWRED Configuration ExampleNetwork requirementsAs shown in Figure 8-2, Server, Telephone, Host A, and Host B are connected to an IP network throughRouter. Server sends critical data traffic, Telephone sends voice traffic, and Host A and Host B sendnon-critical data traffic. On Router, because the rate of incoming interface GigabitEthernet 1/0/1 ishigher than that of outgoing interface Serial 2/0/1, congestion may occur on Serial 2/0/1.It is required that the critical traffic from Server and Telephone be transmitted preferentially whencongestion occurs in the network. At the same time, certain bandwidth is guaranteed for traffic fromHost A and Host B to reduce traffic delay. When congestion deteriorates, packets are dropped based onprecedence.Use WFQ in conjunction with WRED for queue scheduling and packet dropping.
