Replace the secondary interconnect in a DS-V3 configuration

Complete these steps to replace the secondary interconnect in a DS-V3 configuration.

Before you begin:

ThinkAgile Advantage Support: Request Support to retrieve the following interconnect settings from the Cloud Controller database:

• appliance_serial_number, controller_uuid, hypervisor network settings, uplink network settings, and the Network Controller Services version running on the interconnect

• the reserved VLAN IDs (Hardware management network, MLAG/ISL, Hypervisor, Uplink)

• the peerServiceTag of the primary interconnect

Procedure performed by: customer or field service, Lenovo Support

1. Configure the interconnect you are replacing outside of the stack environment.

   The default credentials are:

   • Username: manager

   • Password: ThinkAgileCP

2. On the replacement interconnect, perform the following steps in Cloud Controller:
   1. Edit /etc/tacp/tacp_switch_resource.sh to populate the entries based on settings gathered above (see Installation documents).
   2. Replace /etc/tacp/controller_uuid with the value from the database.
   3. Update /usr/share/tacp/datastore.sqlite using sqlite3 commands, with <DHCP_RANGE_START> and <DHCP_RANGE_END> representing values from the database:

      INSERT INTO property (name,value) VALUES ('DHCP_RANGE_START', '<DHCP_RANGE_START>'); INSERT INTO property (name,value) VALUES ('DHCP_RANGE_END', '<DHCP_RANGE_END>');

3. Redo any per customer custom configuration from the install journal.
4. On the primary interconnect switch:
   1. Edit /etc/tacp/tacp-network-controller.conf and set peerServiceTag to the replacement interconnect’s serial number.
   2. Restart the Network Controller Services using the following command: > sudo service tacp-network-controller restart
5. Replace the failed interconnect switch with the new interconnect, including the cabling. See Cabling a dual-interconnect configuration.
6. Power on the replacement interconnect switch.