Cisco 3020 - Manual (Page 4)

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The blade server includes a chassis management module, the Onboard Administrator. Each switch
module connects internally to the Onboard Administrator through 100BASE-T Ethernet links. You
can manage the switch modules through the Onboard Administrator on a management network that
is isolated from other switch traffic. You can also manage the switch module through any of the
external uplink ports.
Table 1 describes the switch module ports. Each external port has an associated LED.
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.
Table 1 Cisco Catalyst Blade Switch 3020 for HP Port Descriptions
Port Description
Ports 1 to 16 Internal Gigabit Ethernet 1000BASE-X downlink ports.
Ports 17 to 20 and
Ports 17x to 20x Dual-purpose SFP module/RJ-45 copper Ethernet uplink ports. The SFP module
ports support only Cisco 1000BASE-SX fiber-optic modules.
By default, the switch module dynamically selects the interface type that first
links up. SFP modules have precedence if both SFP module and copper Ethernet
interface types are in link-up state. You can also specifically configure each port
for either copper Ethernet or SFP modules if you do not want to use
autodetection.
The copper Ethernet ports support automatic medium-dependent interface
crossover (auto-MDIX) and autonegotiation.
For information about configuring speed and duplex settings for a
dual-purpose uplink port, see the switch module software configuration guide.
Ports 21x to 22x External 10/100/1000BASE-T copper Gigabit Ethernet uplink ports that
support auto-MDIX, and autonegotiation.
Ports 23x to 24x Dual-purpose external/internal 10/100/1000BASE-T copper Gigabit Ethernet
uplink ports. These ports can be configured for internal 1000BASE-X
cross-connection with a corresponding switch module. When ports 23x and
24x are in external operation mode, they support auto-MDIX and
autonegotiation. The default is external operation mode.
Internal
100BASE-T
Ethernet port This port (fa0) is used only for switch module management traffic, not for data
traffic. It is connected to the Onboard Administrator through the blade server
backplane connector.
Console port RJ-45 switch module management port.