Enterasys Networks VH-8TX1MF Manuel d'utilisateur télécharger pdf (Page 21)

9033718-01 Product Overview 7

• Event: a function that operates with the Alarm group to define an

action that will be taken when an alarm condition occurs. The event

may write a log entry and/or send a trap message.

Note that RMON statistics and other information can only be viewed using

a connection to the on-board Web agent or via other compatible SNMP

management applications.

Port Mirroring

The VH-8TX1UM/VH-8TX1MF switch includes the ability to mirror the

traffic being switched on any port for purposes of network traffic analysis

and connection integrity. When this feature is enabled, a protocol

analyzer or RMON probe can be connected to the mirror port. You can

only mirror one port to another port at one time. Port mirroring occurs at

the same speed configured for the port (10 Mbps-to-10 Mbps or 100

Mbps-to-100 Mbps). Port mirroring is configurable using the console

interface menus, the

on-board Web agent, or via SNMP.

Auto-negotiation

Auto-negotiation is a process that permits the switch to automatically

select the operational modes of its 10/100 RJ-45 ports. Upon first being

connected, the switch detects the speed of the network the port is

connected to, either 10 Mbps or 100 Mbps, and the type of

communication setting, half or full duplex. The port is then automatically

set by the switch to operate in the proper mode, without user intervention.

It is not required that the network device being connected to the switch

supports auto-negotiation as the VH-8TX1UM/VH-8TX1MF switch

automatically adjusts to the network device’s communication settings.

Auto-negotiation is configurable using the console interface menus, the

on-board Web agent, or via SNMP.

Multicast Filtering

The purpose of IP multicast filtering is to optimize a switched network’s

performance, so multicast packets will only be forwarded to those ports

containing multicast group hosts or multicast routers/switches, instead of

flooding traffic to all ports. The VH-8TX1UM/VH-8TX1MF supports IP

multicast filtering not only by passively monitoring IGMP Query and

Report messages, but also by actively sending Query messages to learn

the location of multicast routers/switches and member hosts in multicast

groups. IGMP is configurable using the console interface menus, the on-

board Web agent, or via SNMP.

Port Security

Port security protects your network from unauthorized users by

preventing their connected devices gaining access to the network. The

port security feature allows each port to learn, or be configured with, a list

of MAC addresses of devices that are authorized to access the network

through that port. Packets received on the port that have a source MAC

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Enterasys Networks VH-8TX1MF Manuel d'utilisateur Page 21

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