McDATA ULTRANETTM EDGE STORAGE ROUTER 3000 User Manual

Page 153

Configuring an E_Port Extension over an ATM WAN

7-15

Configuring a 1x1 ATM Wide Area Network

enabled VCI values are in the range of 0 to 2047. The values of
3 and 4 are reserved for Operations and Management (OAM)
traffic. A value must specified, there is no default value.

c. Check the box to Enable POS (Packet over SONET) for the

ATM interface.

This enables the direct encapsulation of packets via SONET
framing. POS uses PPP to encapsulate the data. POS is
disabled by default.

If enable Packet Over SONET (POS) for this ATM interface,
the Virtual Path ID (VPI) and Virtual Channel ID (VCI) fields
on this dialog box will be disabled, because the ATM protocol
does not use the VPI and VCI for POS.

d. Select the Quality of Service from the drop-down menu.

• CBR - (Constant Bit Rate)

• VBR - (Variable Bit Rate)

• UBR - (Unspecified Bit Rate)

NOTE:

McDATA recommends using CBR for ATM implementations. The

best performance obtained during testing was with Constant Bit Rate (CBR).

e. Select either the 10

cells/sec

or the 10

bits/sec

cell rate.

• Select 10

cells/sec

to enter the Peak Cell Rate and

Sustained Cell Rate values in Kcells per second.

• Select 10

bits/sec

to enter the Peak Cell Rate and Sustained

Cell Rate values in Mbps.

Switching between the 10

cells/sec

and 10

bits/sec

buttons

will toggle the entered values between the Kcells per second
and Mbps per second formats. The 10

cells/sec

option is the

default selection, so when you reopen the dialog box, the 10

cells/sec

option will be selected.

Active VCI Bits Value

Valid Enabled VCI Values

Zero through 4095

Zero through 2047

Zero through 1023

Zero through 15