Activating and deactivating a CTC interface

6.10 LPAR mode z/VM guest

Use ip or an equivalent command to activate or deactivate an interface.

Before you begin

Activate and deactivate a CTC interfaces only. For information about activating MPC interfaces, see the Communications Server for Linux® documentation.
You must know the interface name.

Where:

<interface>: is the interface name that was assigned when the CTCM group device was set online.
<ip_address>: is the IP address that you want to assign to the interface.
<peer_ip_address>: is the IP address of the remote side.
<max_transfer_unit>: is the size of the largest IP packet that might be transmitted. Be sure to use the same MTU size on both sides of the connection. The MTU must be in the range of 576 byte to 65,536 byte (64 KB).

Where:

<interface>: is the interface name that was assigned when the CTCM group device was set online.

Use ip or an equivalent command to activate the interface:
To deactivate an interface, issue a command of this form:
```
# ip link set dev <interface> down
```

This example activates a CTC interface ctc0 with an IP address 10.0.51.3 for a peer with address 10.0.50.1 and an MTU of 32760.
```
# ip addr add 10.0.51.3 dev ctc0 peer 10.0.50.1
# ip link set dev ctc0 up mtu 32760
```
This example deactivates ctc0:
```
# ip link set dev ctc0 down
```