Multi Channel DMA for PCI Express* Intel® FPGA IP Design Example User Guide

ID 683517
Date 2/06/2022
Public

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3.5.2.6.7. Test Procedure by Using Name Space Environment

Use the following script to create name spaces and execute the commands.

  1. Stop the network manager by using following command:
    systemctl stop NetworkManager.service
  2. Create the name spaces:
    ip netns add <VM name>
    For example:
    ip netns add vm0
    ip netns add vm1
    ip netns add vm2
    ip netns add vm3
    
  3. Assign the interface to name space:
    Command:
    ip link set <interface> netns <namespace>
    ip link set ifc_mcdma0 netns vm0
    ip link set ifc_mcdma1 netns vm1                                                
    ip link set ifc_mcdma2 netns vm2
    ip link set ifc_mcdma3 netns vm3
    
  4. Bring up the interface:

    Command: ip netns exec vm0 ifconfig <interface> up

    Example:
    ip netns exec vm0 ifconfig ifc_mcdma0 up
    ip netns exec vm1 ifconfig ifc_mcdma1 up
    ip netns exec vm2 ifconfig ifc_mcdma2 up
    ip netns exec vm3 ifconfig ifc_mcdma3 up
    
  5. Assigning the IP address:

    Command: ip netns exec <namespace> ip addr add <ipaddr> dev <interfacename>

    Example:
    ip netns exec vm1 ip addr add 1.1.1.11/24 dev ifc_mcdma1
    ip netns exec vm0 ip addr add 1.1.1.10/24 dev ifc_mcdma0
    ip netns exec vm2 ip addr add 1.1.1.12/24 dev ifc_mcdma2
    ip netns exec vm3 ip addr add 1.1.1.13/24 dev ifc_mcdma3
    
  6. Ping from one interface to another interface:
    Command: ip netns exec <namespace> ping <ip address>
    Example:
    ip netns exec vm0 ping 1.1.1.11
    Note: Observing the pkt-loss currently with TCP and UDP traffic overtime after starting the traffic. This leads to hanging and closing of the iperf or netperf connections.

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