.\" Automatically generated by Pod::Man 2.23 (Pod::Simple 3.14) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. 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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" NetInfo \- Defines machine interfaces to register with AFS servers .SH "DESCRIPTION" .IX Header "DESCRIPTION" There are two \fINetInfo\fR files, one for an \s-1AFS\s0 client and one for an \s-1AFS\s0 File Server or database server. The \s-1AFS\s0 client \fINetInfo\fR file specifies the \s-1IP\s0 addresses that the client should register with the File Servers it connects to. The server \fINetInfo\fR file specifies what interfaces should be registered with \s-1AFS\s0 Database Servers or used to talk to other database servers. .SS "Client NetInfo" .IX Subsection "Client NetInfo" The client \fINetInfo\fR file lists the \s-1IP\s0 addresses of one or more of the local machine's network interfaces. If it exists in the \fI/usr/vice/etc\fR directory when the Cache Manager initializes, the Cache Manager uses its contents as the basis for a list of local interfaces. Otherwise, the Cache Manager uses the list of interfaces configured with the operating system. It then removes from the list any addresses that appear in the \&\fI/usr/vice/etc/NetRestrict\fR file, if it exists. The Cache Manager records the resulting list in kernel memory. The first time it establishes a connection to a File Server, it registers the list with the File Server. .PP The File Server uses the addresses when it initiates a remote procedure call (\s-1RPC\s0) to the Cache Manager (as opposed to responding to an \s-1RPC\s0 sent by the Cache Manager). There are two common circumstances in which the File Server initiates RPCs: when it breaks callbacks and when it pings the client machine to verify that the Cache Manager is still accessible. .PP The \fINetInfo\fR file is in \s-1ASCII\s0 format. One of the machine's \s-1IP\s0 addresses appears on each line, in dotted decimal format. The File Server initially uses the address that appears first in the list. The order of the remaining addresses is not significant: if an \s-1RPC\s0 to the first interface fails, the File Server simultaneously sends RPCs to all of the other interfaces in the list. Whichever interface replies first is the one to which the File Server then sends pings and RPCs to break callbacks. .PP To prohibit the Cache Manager absolutely from using one or more addresses, list them in the \fINetRestrict\fR file. To display the addresses the Cache Manager is currently registering with File Servers, use the \fBfs getclientaddrs\fR command. To replace the current list of interfaces with a new one between reboots of the client machine, use the \fBfs setclientaddrs\fR command. .SS "Server NetInfo" .IX Subsection "Server NetInfo" The server \fINetInfo\fR file, if present in the \fI/usr/afs/local\fR directory, defines the following: .IP "\(bu" 4 On a file server machine, the local interfaces that the File Server (\fBfileserver\fR process) can register in the Volume Location Database (\s-1VLDB\s0) at initialization time. .IP "\(bu" 4 On a database server machine, the local interfaces that the Ubik database synchronization library uses when communicating with the database server processes running on other database server machines. .PP If the \fINetInfo\fR file exists when the File Server initializes, the File Server uses its contents as the basis for a list of interfaces to register in the \s-1VLDB\s0. Otherwise, it uses the list of network interfaces configured with the operating system. It then removes from the list any addresses that appear in the \fI/usr/afs/local/NetRestrict\fR file, if it exists. The File Server records the resulting list in the \fI/usr/afs/local/sysid\fR file and registers the interfaces in the \s-1VLDB\s0. The database server processes use a similar procedure when initializing, to determine which interfaces to use for communication with the peer processes on other database machines in the cell. .PP The \fINetInfo\fR file is in \s-1ASCII\s0 format. One of the machine's \s-1IP\s0 addresses appears on each line, in dotted decimal format. The order of the addresses is not significant. .PP Optionally, the File Server can be forced to use an \s-1IP\s0 address that does not belong to one of the server interfaces. To do this, add a line to the \&\fINetInfo\fR file with the \s-1IP\s0 address prefixed with \*(L"f\*(R" and a space. This is useful when the File Server is on the internal side of a \s-1NAT\s0 firewall. .PP To display the File Server interface addresses registered in the \s-1VLDB\s0, use the \fBvos listaddrs\fR command. .SH "EXAMPLES" .IX Header "EXAMPLES" If the File Server is on the internal side of a \s-1NAT\s0 firewall, where it serves internal clients using the \s-1IP\s0 address 192.168.1.123 and external clients using the \s-1IP\s0 address 10.1.1.321, then the \fINetInfo\fR file should contain the following: .PP .Vb 2 \& 192.168.1.123 \& f 10.1.1.321 .Ve .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fINetRestrict\fR\|(5), \&\fIsysid\fR\|(5), \&\fIvldb.DB0\fR\|(5), \&\fIfileserver\fR\|(8), \&\fIfs_getclientaddrs\fR\|(1), \&\fIfs_setclientaddrs\fR\|(1), \&\fIvos_listaddrs\fR\|(1) .SH "COPYRIGHT" .IX Header "COPYRIGHT" \&\s-1IBM\s0 Corporation 2000. All Rights Reserved. .PP This documentation is covered by the \s-1IBM\s0 Public License Version 1.0. It was converted from \s-1HTML\s0 to \s-1POD\s0 by software written by Chas Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.