Cisco Systems 9001S, ASR9001 Management LAN Ports Connection Guidelines, Auxiliary Port Signals

Chapter 1 Preparing for Installation

Cisco ASR 9001 Router Port Connection Guidelines

Auxiliary Port Signals

The RP Auxiliary (AUX) port is a RJ-45 interface for connecting a modem or other data communication equipment (DCE) device (such as another router) to the RP. The AUX port supports hardware flow control and modem control.

Table 1-4lists the signals used on the Auxiliary port.

Table 1-4	RP AUX Port Signals
AUX Port Pin		Signal	Input/Output	Description
1		RTS	Output	Request to send
2		DTR	Output	Data terminal ready
3		TxD	Output	Transmit data
4		GND	—	Signal ground
5		GND	—	Signal ground
6		RxD	Input	Receive data
7		DSR	Input	Data set ready
8		CTS	Input	Clear to send

Management LAN Ports Connection Guidelines

The RP has two RJ45 media-dependent interface (MDI) Ethernet management LAN ports: MGT LAN 0 and MGT LAN 1 (see Figure 1-23).

These ports are used for IEEE 802.3 10BASE-T (10 Mbps), IEEE 802.3u 100BASE-TX (100 Mbps), or 1000BASE-T (1000 Mbps) Ethernet connections.

The transmission speed of the management LAN ports is not user-configurable. The transmission speed is set through an auto-sensing scheme on the RP; the speed is determined by the network to which that the Ethernet port is connected. The combined total input rate of both MGT LAN 0 and MGT LAN 1 is about 12 Mbps.

Management port characteristics are:

•Maximum transmission unit (MTU) is fixed at 1514 and cannot be configured.

•Flow control is disabled and cannot be configured.

•Input unicast packets with an unknown destination address are filtered and dropped.

•Autonegotiation of port speed (10/100/1000) and duplex (full/half) is supported. Autonegotiation cannot be disabled.

Table 1-5lists the signals used on the Management LAN ports.

Table 1-5 RP Management LAN Port Signals

			MGT LAN Port Pin	10Base-T, 100Base-TX Signal	1000Base-T Signal
1				Transmit+	BI_DA+
2				Transmit–	BI_DA–
3				Receive+	BI_DB+
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