Cabletron Systems CyberSWITCH CSX150 User Manual

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USER’S GUIDE322 CyberSWITCHfiles and devices depending upon its configuration. Refer to your UNIX system documentation formore information on syslogd.Each log message sent to a syslogd server has a priority tag associated with it. The priority tag isencoded as a combination: facility.level. The facility identifies the part of the system creating thelog message and the level describes the severity of the condition which caused the log message tobe written.When sending a log message to a Syslog Server, the message is formatted as an ASCII string withthe first item in the string being the syslog priority enclosed in angle brackets. The priority ispresented as a decimal value, not a hexadecimal value. For example, to log the string “CDRVERIFY” with a priority of authentication.info, the priority (26 hex) would be converted to 38decimal and the syslog server would be sent the string “<38> CDR VERIFY”. The Syslog daemonwill use the priority of 38 (26 hex) to determine where the message should be sent or stored. Thestring “CDR VERIFY” will then be sent to that destination.The priority tag is implemented as an 8 bit hexadecimal integer. The low order three bits containthe severity level; the high order 5 bits contain the facility. Thus, for a convenient example, levelinfo is encoded as the value 6 and facility authentication is encoded as the value 4 (in BSD UNIXv4.3). These two fields are combined as follows:• level ‘6’ => 06 hex• facility ‘4’ shifted left 3 bits to use the high order 5 bits => 20 hex• bitwise OR the two values together => 26 hexIn result, priority of authentication.info is encoded as 26 hex.Note: Because the values for both the facilities and the severity levels may vary from one versionof UNIX to the next, the system allows you to set the entire priority value as an integer. Thisinteger will be prepended to all messages sent to the Syslog Server.One of the sources from which syslogd accepts log messages is UDP port 514. This is the accesspoint that the system’s CDR subsystem uses when logging to a syslog server. It sends its logmessages to UDP port 514 at the server’s IP address.Syslog Servers use UDP which is a datagram service. When a datagram is sent to a Syslog Server,there is no acknowledgment that the datagram was properly received. To reduce the possibility oflost data, two Syslog Servers may be used. The two resulting log files can be compared to detectmissing data in one or the other.CDR L OG R EPORT O VERVIEWThis option allows you select the storage destination of your CDR log reports. You may send theCDR log reports to the local log, or to a previously configured offnode Syslog Server(s). A total ofthree destinations may be selected. For example, you could select the local log, and two previouslyconfigured Syslog Servers for your CDR log reports’ destinations.Storage on the local log is not recommended for production use; it is intended primarily fordiagnostic use. This is because the local log only retains a fixed number of log entries. Once the fileis full, each new entry overwrites the oldest entry. This will not give you a complete CDR Log.CDR reports sent to the local file can be written to disk by issuing thelog cdr write command.The file is the written to the \LOG directory. The file name is CDR_LOG. The file extensions are .1,