Maipu Administration Guide

Configure WRED

Network Requirements

Lots of terminals download files from the FTP server.
Configure the WRED function on Device, preventing the TCP global synchronization from resulting in the intermittent FTP connection.

Network Topology

Networking of configuring WRED

Figure 1-7 Networking of configuring WRED

Configuration Steps

Step 1: Configure the link type of the VLAN and port on Device.

#Create VLAN2.

Device#configure terminal
Device(config)#vlan 2
Device(config-vlan2)#exit

#Configure the link type of port gigabitethernet0/1 as Access and permit the services of VLAN2 to pass.

Device(config)#interface gigabitethernet 0/1
Device(config-if-gigabitethernet0/1)#switchport mode access
Device(config-if-gigabitethernet0/1)#switchport access vlan 2

#Configure the link type of port gigabitethernet0/2 as Trunk and permit the services of VLAN2 to pass.

Device(config-if-gigabitethernet0/1)#interface gigabitethernet 0/2
Device(config-if-gigabitethernet0/2)#switchport mode trunk
Device(config-if-gigabitethernet0/2)#switchport trunk allowed vlan add 2
Device(config-if-gigabitethernet0/2)#exit

Step 2: Configure the WRED function.

#Configure the drop start value of the packet in queue 0 on port gigabitethernet0/2 as 80 and the drop rate as 45.

Device(config)#interface gigabitethernet 0/2
Device(config-if-gigabitethernet0/2)#drop-mode 0 wred drop-start 80 drop-rate 45
Device(config-if-gigabitethernet0/2)#exit

The packets sent from PC are all Untag packets and enter queue 0 by default.

Step 3: Check the result.

#When lots of terminals download files from the FTP server, the intermittent FTP connection does not happen.