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Chapter 15 Bandwidth Management
NBG334S User’s Guide
148
15.7 Default Bandwidth Management Classes and Priorities
If you enable bandwidth management but do not configure a rule for critical traffic like VoIP,
the voice traffic may then get delayed due to insufficient bandwidth. With the automatic traffic
classifier feature activated, the NBG334S automatically assigns a default bandwidth
management class and priority to traffic that does not match any of the user-defined rules. The
traffic is classified based on the traffic type. Real-time traffic always gets higher priority over
other traffic.
The following table shows you the priorities between the three default classes (AutoClass_H,
AutoClass_M and Default Class) and user-defined rules. 6 is the highest priority.
REXEC(TCP:514) Remote Execution Daemon.
RLOGIN(TCP:513) Remote Login.
RTELNET(TCP:107) Remote Telnet.
RTSP(TCP/UDP:554) The Real Time Streaming (media control) Protocol (RTSP) is a
remote control for multimedia on the Internet.
SFTP(TCP:115) Simple File Transfer Protocol.
SMTP(TCP:25) Simple Mail Transfer Protocol is the message-exchange standard for
the Internet. SMTP enables you to move messages from one e-mail
server to another.
SNMP(TCP/UDP:161) Simple Network Management Program.
SNMP-TRAPS(TCP/UDP:162) Traps for use with the SNMP (RFC:1215).
SQL-NET(TCP:1521) Structured Query Language is an interface to access data on many
different types of database systems, including mainframes, midrange
systems, UNIX systems and network servers.
SSH(TCP/UDP:22) Secure Shell Remote Login Program.
STRM WORKS(UDP:1558) Stream Works Protocol.
SYSLOG(UDP:514) Syslog allows you to send system logs to a UNIX server.
TACACS(UDP:49) Login Host Protocol used for (Terminal Access Controller Access
Control System).
TELNET(TCP:23) Telnet is the login and terminal emulation protocol common on the
Internet and in UNIX environments. It operates over TCP/IP
networks. Its primary function is to allow users to log into remote host
systems.
TFTP(UDP:69) Trivial File Transfer Protocol is an Internet file transfer protocol
similar to FTP, but uses the UDP (User Datagram Protocol) rather
than TCP (Transmission Control Protocol).
VDOLIVE(TCP:7000) Another videoconferencing solution.
Table 59 Commonly Used Services
SERVICE DESCRIPTION
Table 60 Bandwidth Management Priority with Default Classes
CLASS TYPE PRIORITY
User-defined with high priority 6
AutoClass_H 5
User-defined with medium priority 4
148


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