Summary

This procedure will guide you to perform the network conversion from Legacy Rack to Leaseweb’s Next-Generation Network (NGN) rack architecture in order to re-establish the server's network connectivity.

Work instructions

Please, follow these instructions to proceed with the network conversion from Legacy Rack to NGN rack architecture.

VMware

1) Tech Refresh Preparation.

This section explains how to save the basic network information before the server is moved to the new NGN rack, to facilitate the reconfiguration of the network on the server once the server is in the new rack.

Save the minimal network information.

It is important to keep the minimal network information because you will reconfigure the same IPs once the server is placed in the new Leaseweb NGN rack.

Login to VMware vSphere ESXi host as a superuser or root with SSH.

Run the esxcli network ip interface list command to get the network card details.

Get the network card details:
[root@esxi:~] esxcli network ip  interface list
vmk0
   Name: vmk0
   MAC Address:  54 :9f:35: 22 :1b:14
   Enabled: true
   Portset: vSwitch0
   Portgroup: Management Network
   Netstack Instance: defaultTcpipStack
   VDS Name: N/A
   VDS UUID: N/A
   VDS Port: N/A
   VDS Connection: -1
   Opaque Network ID: N/A
   Opaque Network Type: N/A
   External ID: N/A
   MTU: 1500
   TSO MSS: 65535
   Port ID: 33554436

Run the esxcli network ip interface ipv4 get command to get the IP address details.

Get the IP address details.
[root@esxi:~] esxcli network ip  interface ipv4 get
Name  IPv4 Address  IPv4 Netmask   IPv4 Broadcast  Address Type  Gateway  DHCP DNS
----  ------------  -------------  --------------  ------------  -------  --------
vmk0  10.65. 26.80    255.255. 255.0   10.65.26.255    STATIC        0.0. 0.0      false

Run the esxcli network ip route ipv4 list command to get the route details.

Get the route details.
[root@esxi:~] esxcli network ip route ipv4 list
Network     Netmask        Gateway     Interface  Source
----------  -------------  ----------  ---------  ------
default     0.0 . 0.0        10.65.26.4  vmk0       MANUAL
10.65.26.0  255.255 .255.0  0.0.0.0     vmk0       MANUAL

To display the default gateway of VMkernel, run the esxcfg-route command.

Get the gateway details
[root@esxi:~] esxcfg-route
VMkernel default gateway is 10.65. 26.4

2) Post-Tech Refresh (Server already moved to the NGN Rack)

Convert Network Configuration

⚠You will first need to access the remote console of your server. 

To access a server without a network, you need to connect to the  VPN and once connected access the IPMI.

Once the server is moved the IPMI connection information will be changed.

You can read the following knowledge base to retrieve the updated credentials.

Network Configuration on a VMWare server

  1. Press F2 to connect to your VMWare server and enter your user and Password
    Step 1
  2. Select the third option "Configure Management Network"
    step 2
  3. Select the second option and remove the VLAN
    step 3
  4. Finally, In the Network section of your server configuration, remove any VLAN used in any Port-Group.
    +++++++++++++       ETH0 should be connected to the Public Port-Group

VMware DNS Modification

If you were using the legacy "DNS Servers", you will need to modify them.

# Legacy DNS servers
209.172.41.202
209.172.41.200
 
# New DNS servers
23.19.53.53
23.19.52.52
  1. Access ESXi console.

  2. Remove the old DNS.

    esxcli network ip dns server remove -s 209.172. 41.202
    esxcli network ip dns server remove -s 209.172. 41.200

  3. Add the new DNS.

    esxcli network ip dns server add -s 23.19. 53.53
    esxcli network ip dns server add -s 23.19. 52.52
<~-- -->