This is defined by the control vector X'64' (CV64) and contains the IP characteristics of a TN3270E LU. These characteristics include the IP address of the LU, the port name associated with the LU, and the name of the LU's domain name server, if any. The WE_IP_ADDR field has been deprecated because it can be used for a client represented by only an IPv4 address. WE_PORT_NUM , WE_DNS_NAME_LEN, and WE_DNS_NAME have also been deprecated. To support both IPv4 and IPv6 clients, the WE_CV64_PTR is a pointer to a CV64. Exits should change to process the CV64 information. See SNA Formats for information about how to process the CV64 and its subvectors.