How to configure communication between ACU2 and a switch

Hi everyone,

You all know what is an ACU2 and where it can be connected but I think it's useful to know how can we configure the communication between the ACU2 and the chassis where ACU2 is plugged.

As shown in Figure 1, ACU2 is installed in a chassis switch Switch_1. Interfaces XGE0/0/1 and XGE0/0/2 on ACU2 are connected to interfaces XGE1/0/1 and XGE1/0/2 on Switch_1 respectively. Switch_1 can be connected to an AP directly or through a network device, such as Switch_2 in this figure.

Figure 1 Configuring communication between ACU2 and a switch

NOTE:

Switch_1 connects to ACU2 through interfaces XGE1/0/1 and XGE1/0/2. The first digit 1 in the interface number indicates the ID of the slot in which ACU2 is installed. XGE1/0/1 indicates that ACU2 is installed in slot 1 of Switch_1. If ACU2 is installed in slot 2 of Switch_1, it connects to ACU2 through interfaces XGE2/0/1 and XGE2/0/2.

XGE interfaces on ACU2 and Switch_1 that are connected need to be added to an Eth-Trunk to increase link bandwidth and reliability. If XGE0/0/1 and XGE0/0/2 are not added to an Eth-Trunk, only XGE0/0/1 can become Up but XGE0/0/2 is always Down.

Procedure

Configuring ACU2
NOTE:
After completing the following steps, configure WLAN services according to WLAN Service Configuration Guide.
1. Run:
```
system-view
```
  The system view of ACU2 is displayed.
2. Run:
```
vlan vlan-id
```
  A VLAN is created and the VLAN view is displayed.
3. Run:
```
quit
```
  Return to the system view.
4. Run:
```
interface eth-trunk trunk-id
```
  An Eth-Trunk is created and the Eth-Trunk interface view is displayed.
5. Run:
```
port link-type trunk
```
  Attributes for the Eth-Trunk interface are configured.
6. Run:
```
port trunk allow-pass vlan { { vlan-id1 [ to vlan-id2 ] } &<1-10> | all }
```
  Interfaces are added to a specified VLAN.
7. Add XGE interfaces on ACU2 that are connected to the switch to an Eth-Trunk.
  NOTE:
  When adding XGE interfaces to the same Eth-Trunk, retain the default configurations on the interfaces; otherwise, the interfaces cannot be added to the Eth-Trunk.
  - Add member interfaces to the Eth-Trunk in the Eth-Trunk interface view.
    Run:
```
trunkport interface-type { interface-number1 [ to interface-number2 ] } &<1-8>
```
    Member interfaces are added to the Eth-Trunk.
  - Add member interfaces to the Eth-Trunk in the member interface view.
    1. Run:
```
quit
```
      Return to the system view.
    2. Run:
```
interface interface-type interface-number
```
      The interface view is displayed.
    3. Run:
```
eth-trunk trunk-id
```
      The current interface is added to the Eth-Trunk.
Configuring a Switch
NOTE:
The following configuration steps use a switch running V200R010C00 as an example.
1. Run:
```
system-view
```
  The system view is displayed.
2. Run:
```
vlan vlan-id
```
  A VLAN is created and the VLAN view is displayed.
3. Run:
```
quit
```
  Return to the system view.
4. Run:
```
load-distribution mode slot slot-id enhanced
```
  The maximum forwarding capacity is configured for ACU2.
  slot-id specifies the slot number of ACU2.
5. Run:
```
interface eth-trunk trunk-id
```
  An Eth-Trunk is created and the Eth-Trunk interface view is displayed.
6. Run:
```
port link-type trunk
```
  Attributes for the Eth-Trunk interface are configured.
7. Run:
```
port trunk allow-pass vlan { { vlan-id1 [ to vlan-id2 ] } &<1-10> | all }
```
  Interfaces are added to a specified VLAN.
8. Add XGE interfaces on the switch that are connected to ACU2 to an Eth-Trunk.
  NOTE:
  When adding XGE interfaces to the same Eth-Trunk, retain the default configurations on the interfaces; otherwise, the interfaces cannot be added to the Eth-Trunk.
  - Add member interfaces to the Eth-Trunk in the Eth-Trunk interface view.
    Run:
```
trunkport interface-type { interface-number1 [ to interface-number2 ] } &<1-8>
```
    Member interfaces are added to the Eth-Trunk.
  - Add member interfaces to the Eth-Trunk in the member interface view.
    1. Run:
```
quit
```
      Return to the system view.
    2. Run:
```
interface interface-type interface-number
```
      The interface view is displayed.
    3. Run:
```
eth-trunk trunk-id
```
      The current interface is added to the Eth-Trunk.

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