Linksys SLM224G4S Manuel d'utilisateur télécharger pdf (Page 42)

Chapter 5

Configuration Using the Web-based Utility

24/48-Port 10/100 + 4-Port Gigabit Resilient Clustering Smart Switch with 2 Combo SFPs

Port Fast Indicates if Fast Link is enabled on the port.

If Fast Link mode is enabled for a port, the Port State

is automatically placed in the Forwarding state when

the port link is up. Fast Link optimizes the STP protocol

convergence. STP convergence can take 30-60 seconds in

large networks. The possible values are Enable, Auto, and

Disable. The default is Disable.

Port State Displays the current STP state of a port. If

enabled, the port state determines what forwarding

action is taken on traffic. Possible port states are:

Disabled STP is currently disabled on the port. The

port forwards traffic while learning MAC addresses.

Blocking The port is currently blocked and cannot

forward traffic or learn MAC addresses.

Listening The port is in Listening mode. The port

cannot forward traffic nor can it learn MAC addresses.

Learning The port is in Learning mode. The port

cannot forward traffic, but can learn new MAC

addresses.

Forwarding The port is in Forwarding mode. The port

can forward traffic and learn new MAC addresses.

Speed Displays the speed at which the port is operating.

Path Cost Indicates the port contribution to the root path

cost. The path cost is adjusted to a higher or lower value,

and is used to forward traffic when a path being rerouted.

The default value is 2000000 for a 10M port, 200000 for a

100M port, and 20000 for a 1G port or a LAG.

Default Path Cost When selected the default path cost is

implemented. The default is unselected.

Priority Priority value of the port. This value influences

the port choice when a bridge has two ports connected in

a loop. The range of values is 0 -240. The default is 128.

Designated Bridge ID Displays the bridge priority and

the MAC Address of the designated bridge.

Designated Port ID Displays the selected port’s priority

and interface.

Designated Cost Displays the cost of the port

participating in the STP topology. Ports with a lower cost

are less likely to be blocked if STP detects loops.

Forward Transitions Displays the number of times the

port has changed from the Blocking state to Forwarding

state.

Click Update to update the screen with your changes.

Click Save Settings to save the changes, or Cancel

Changes to cancel the changes.

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Multicast

Multicast configuration options include IGMP Snooping,

Bridge Multicast, and Bridge Multicast Forward All.

Multicast > IGMP Snooping

When IGMP Snooping is enabled globally, all IGMP packets

are forwarded to the CPU. The CPU analyzes the incoming

packets and determines:

Which ports want to join which Multicast groups

Which ports have Multicast routers generating IGMP

queries

Which routing protocols are forwarding packets and

Multicast traffic

Ports requesting to join a specific Multicast group issue an

IGMP report, specifying that Multicast group is accepting

members. This results in the creation of the Multicast

filtering database.

The Bridge Multicast Forward All screen contains two

sections, IGMP Global and VLAN IGMP Settings. These

sections and the fields they contain are described below.

IGMP Global

Enable IGMP Snooping Select this option to enable

IGMP Snooping on the device. IGMP Snooping can be

enabled only if Bridge Multicast Filtering is enabled. The

default is disabled (option not selected).

VLAN IGMP Settings

VLAN ID Select the VLAN ID from the drop-down menu.

IGMP Status Select this option to enable IGMP snooping

on the VLAN. Default is disabled (option not selected).

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Linksys SLM224G4S Manuel d'utilisateur Page 42

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