Activating an interface

6.18 z/VM guest

Use ip or an equivalent command to activate the interface.

About this task

Figure 1. ip syntax for setting an IP address for an IUCV connection

Figure 2. ip syntax for activating an IUCV interface

where:

<interface>: is the interface name.
<ip_address>: is the IP address of your Linux® instance.
<peer_ip_address>: for direct connections this is the IP address of the communication peer; for routed connections this is the IP address of the TCP/IP service machine or Linux router to connect to.
<max_transfer_unit>: is the size in byte of the largest IP packets which may be transmitted. The default is 9216. The valid range is 576 through 32764.
Note: An increase in buffer size is accompanied by an increased risk of running into memory problems. Thus a large buffer size increases speed of data transfer only if no out-of-memory-conditions occur.

For more details, see the ip man page.

This example activates a connection to a TCP/IP service machine with IP address 1.2.3.200 using a maximum transfer unit of 32764 bytes.

# ip addr add 1.2.3.100 dev iucv1 peer 1.2.3.200
# ip link set dev iucv1 up mtu 32764