Lucent Technologies Cajun M770 User Manual download pdf (Page 59)

Cajun M400 Manager User’s Guide 69

Port Mode The operational mode of the port or ports on the

module. Not all modules support all modes. Both

sides of the link must be in the same mode. Flow

Control and ISL (Interswitch Link) are

recommended for backbone links with Lucent

Technologies’ equipment. Note that the Port Speed

field will be insensitive if the Use Switches field is

set to ON.

The components which make up the mode are:

• Half Duplex (HDX) - The port operates in Half

Duplex.

• Full Duplex (FDX) -The port operates in Full

Duplex and doubles its speed. No repeaters are

allowed in the path.

• Flow Control (FC) - Flow Control is a

proprietary mechanism that prevents packet loss

on the link due to congestion in the Full Duplex

mode.

• Interswitch Link (ISL) - Interswitch Link is a

proprietary mechanism to tag packets with

VLAN and priority information across the

backbone. This allows two Lucent devices to act

as a single logical entity.

The possible modes are:

• Half Duplex (HDX)

• Full Duplex (FDX)

• Full Duplex and Flow Control (FDX+FC)

• Full Duplex and Interswitch Link

(FDX+ISL)

• Full Duplex, Flow Control, and Interswitch

Link (FDX+FC+ISL)

Port Speed The Ethernet speed of the port. Port speed can be

either Ethernet (10 Mbps), Fast Ethernet (100

Mbps), or Gigabit Ethernet (1000 Mbps). Some

units have

10BaseT/100BaseTX ports, where each port can

work in either 10Mbps or 100Mbps.

Field Name Description

1 2 ... 54 55 56 57 58 59 60 61 62 63 64 ... 71 72

No comments

Lucent Technologies Cajun M770 User Manual Page 59