ATM Configuration and Troubleshooting Guide

Installing and Configuring the ATM Software
Preparing for Configuration
Chapter 218
— When using LAN emulation, we recommend that you put
all of your ATM systems in a separate subnet and use an
MTU size of 9 Kbytes for the subnet.
— Use an MTU size of 1500 bytes for subnets that include
“legacy” systems.
— Do not configure a Classical IP (CIP) interface with an MTU
size less than 576 bytes (as defined in RFC 1063) or larger
than 9180 bytes (the default).
Figure 2-1 below shows a network design that follows these
recommendations.
Figure 2-1 Recommended Network Design
• HP-HSC bus.
— For the D-Class servers, install the J2499A and J3573A ATM
adapters in the Turbo slot.
ATM
System A
System B
System C
LAN
System D
edge device
subnet A
MTU = 9 Kbytes
subnet B
MTU = 1500 bytes