
The blade server includes a chassis management module, the Onboard Administrator. Each switch module connects internally to the Onboard Administrator through 
Table 1 describes the switch module ports. Each external port has an associated LED.
| Table 1 | Cisco Catalyst Blade Switch 3020 for HP Port Descriptions | |
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| Port | 
 | Description | 
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| Ports 1 to 16 | Internal Gigabit Ethernet  | |
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| Ports 17 to 20 and | ||
| Ports 17x to 20x | module ports support only Cisco  | |
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 | By default, the switch module dynamically selects the interface type that first | 
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 | links up. SFP modules have precedence if both SFP module and copper Ethernet | 
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 | interface types are in  | 
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 | for either copper Ethernet or SFP modules if you do not want to use | 
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 | autodetection. | 
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 | The copper Ethernet ports support automatic  | 
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 | crossover  | 
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 | For information about configuring speed and duplex settings for a | 
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 | |
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| Ports 21x to 22x | External  | |
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 | support  | 
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| Ports 23x to 24x | ||
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 | uplink ports. These ports can be configured for internal  | 
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 | |
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 | 24x are in external operation mode, they support  | 
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 | autonegotiation. The default is external operation mode. | 
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| Internal | 
 | This port (fa0) is used only for switch module management traffic, not for data | 
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 | traffic. It is connected to the Onboard Administrator through the blade server | 
| Ethernet port | backplane connector. | |
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| Console port | ||
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The switch module is powered from the blade server backplane, and temperature management is provided by the blade server. There is no fan on the switch module.
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