;EXTEND.TXT ------------------------------------------------------------- -- EXTENDED FUNCTION INSTALLATION -- ------------------------------------------------------------- The second (and optional) part of the Building Block installation adds support for host name resolution. Also included are NetBIOS programming interface configuration variables and IP packet- handling variables which may apply only if you are adding more Wollongong products. Gateway Address --------------- IP address of gateway on local subnet. This address is necessary to access external subnets. Username -------- The username is used by TCP/IP applications (such as TELNET and FTP) for host authorization. For example, if you use the remote commands (such as RCP,RSH, and RLOGIN), the username on the PC (client) must match the username on the remote host (server). Enter up to 30 characters for a username. Hostname -------- The official Hostname is used by the Wollongong PathWay Access (DOS) Remote commands, as well as Wollongong PathWay Client Plus, PathWay Server, and PathWay Client NFS for host authorization. The official hostname should appear in the host.equiv and host files on remote machines to which you want to log in. Enter up to 50 characters for an official hostname. To use the official hostname for host authorization, all hosts on the network should have the same domain name, such as twg.com. If you have a domain name server on your network, the official hostname must include the name of the host, plus a fully specified domain name. For example, a host bertha at Wollongong would have an official hostname of bertha.twg.com. The top-level domain for this commercial organization is com, while the company-wide subdomain is twg. Domain Name Server(s) --------------------- IP Address Hostname See Hostname above. IP Broadcast Bits ----------------- Building Block permits you to customize your network to accommodate the broadcast address used by the hosts on your network. There are two possible broadcast addresses: 0 1 Older implementations of TCP/IP based on the Berkeley Software Distribution (BSD) 4.2 release use 0 as part of the broadcast address. The later release of BSD 4.3 uses 1. This has become the standard for newer machines and networks. Building Block permits you to change 1 to 0. Size of packet buffers ---------------------- The size in memory that is used for holding incoming and outgoing packets. The default is 1526 bytes for Ethernet. You can choose 578, 1090, or 1526 for Ethernet environments. You may also enter your own value. The size should be large enough to accept the largest packet your PC can be expected to receive. Reducing the size of your packet buffers saves memory. Number of packet buffers ------------------------ The number of packets that can be sent or received at any point in time. The number of buffers must be sufficient to keep packets from being lost during large transmissions. For the Ethernet default buffer size of 1526 bytes, the default is six packet buffers; the maximum number allowed is 20. Network to Physical Address Translation Cache --------------------------------------------- IP Address Physical Address Allows you to assign Internet addresses to Ethernet hosts that do not support Address Resolution Protocol (ARP). ARP translates the Internet address of a host to its physical address. The physical address is the address of the network interface card in the PC. Interface cards respond only to their own physical address. So, when you type an Internet address to connect with a host on the network, the Internet address is translated to the physical address of the card so the card can respond. ARP performs this translation. However, if a host on the network does not support ARP, you need to type the physical and Internet address of the host in the network to physical address translation cache window. You can find a physical address printed on a label on each card. If you use this feature, the open connection process will be faster, the network overhead will be reduced, and network traffic will be less congested. Building Block supports up to three network-to-Internet address translations. TCP window in bytes ------------------- Sets the maximum number of packets that can be sent from or received by the PC before it must either receive or send a response. This value depends on the packet size; for example, for a packet size of 1526 bytes (Ethernet), the default TCP window size is 1460. You can also choose 2920, 4380, or 5840. Number of UDP sessions ---------------------- Sets the number of UDP sessions allowed for the PC. Each UDP session requires one UDP connection. Number of NetBIOS sessions -------------------------- Sets the number of NetBIOS sessions (and TCP connections) allowed for the PC. Each NetBIOS session requires one TCP connection. There should always be one session available at any time. Therefore, the value for this parameter should be the number of remote hosts on your network, plus one. The default for this value is 4 and can be set as high as 32. Turn on Unload NetBIOS Feature? ------------------------------- n or y y(es) means that you can remove the NetBIOS executable files (NETBIOS.EXE, NB_CLI.EXE, and NBNS.EXE) by deallocating the kernel (by typing pwtcprm.) n(o) means that you cannot remove these executable files by removing the kernel. NetBIOS keepalive time (in seconds) ----------------------------------- The time interval at which NetBIOS keep-alive packets are sent. A keep-alive packet tells a host to keep the session active, even if there has been no activity on the network for several hours. Default=0 (off). Active range=1 through 999. SNMP management station ----------------------- IP address Hostname IP address and hostname of PC on subnet running management software. TCP maximum retransmission timeout ---------------------------------- The maximum timeout interval when retransmitting TCP packets. One tick is about 1/18 second. The maximum in this case, 300 ticks, is 16 2/3 seconds. TCP minimum retransmission timeout ---------------------------------- The minimum timeout interval when retransmitting TCP packets. One tick is about 1/18 second. The minimum in this case, 2 ticks, is 1/9 second. **END**