The 9- slot, vertical-chassis Catalyst 6509-NEBS has back-to-front airflow and is ideally suited for service-provider environments or for those enterprise customer environments in which front-to-back airflow is preferred.
Supports all Catalyst 6500 modules, including all:
Supports both CatOS and IOS software
Provides maximum uptime with redundancy and rapid 2-3 second failover across supervisor engine
Provides front-to-back airflow