Port/VLAN Redirect Function
1-4 Introduction
1.5 PORT/VLAN REDIRECT FUNCTION
The port redirect function, also referred to as “Port Mirroring,” is a troubleshooting tool used to
map traffic from a single source port to a single destination port within the module. This feature
allows frames, including those with errors, to be copied and sent to an analyzer or RMON probe.
The analyzer or RMON probe will see the data as if it were directly connected to the LAN se gment
of the source port.
The VLAN redirect function is similar to the port redirect function except that the frames received
by the module are redirected to a designated destination por t acco rding t o t he VLAN c lassi f ica tion
of the frames received. Multiple VLANs can be directed to the same destination port. The VLAN
redirect function is only supported when the module is operating as an 802.1Q switch.
1.6 FLOW CONTROL
Flow control is a method of managing the flow of frames between two devices. It ensures that a
transmitting device does not overwhelm a receiving device with data. This is accomplished by the
transmitting device pausing its transmission while the receiving device processes the frames
already received.
The module supports frame-based 802.3x flow control. Frame-based 802.3x flow control is
supported on all Ethernet ports operating in the full-duplex mode. Flow control can be enabled or
disabled on a port-by-port basis.
Back pressure flow control is not supported on ports operating in the half-duplex mode.
1.7 802.1 PORT PRIORITY
The 802.1 port priority is used to assign a default p riority to the frames received without priority
information in their tag header, map prioritized frames to the appropriate transmit queues, and
prioritize frames according to protocol type. The 802.1 port priority is part of the IEEE 802.1D
standard.
1.8 MANAGEMENT
Management of the module can be either in-band or out-of-band. In-band remote management is
possible through any SNMP-compliant Network Management Software, such as Enterasys
Networks’ NetSight and Aprisma Management Technology’s SPECTRUM for Open Systems suite
of management products. In-band management using Telnet and Enter asys Networks’ Webview is
also provided. Out-of-band Local Management is provided through the RJ45 COM port on the
front panel using a VT100 terminal or a VT100 terminal emulator.
Local Management provides the ability to manage the module. Refer to the MATRIX E5 Series
Modules Local Management User’s Guide for more informa tion.