Management LAN Ports Connection Guidelines
Each RSP/RP card has two RJ-45 media-dependent interface (MDI) Ethernet management LAN ports: MGT
LAN 0 and MGT LAN 1. These ports are used for IEEE 802.3u 100BASE-TX (100 Mbps), or 1000BASE-T
(1000 Mbps) Ethernet connections. For the management port locations, see Route Processor Overview .
The transmission speed of the management LAN ports is not user-configurable. The transmission speed is set
through an autosensing scheme on the RSP/RP; the speed is determined by the network that the Ethernet port
is connected to. 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 (100/1000) and duplex (full/half) is supported. Autonegotiation cannot
be disabled.
This table lists the signals used on the Management LAN ports.
Table 7: RSP/RP Management LAN Port Signals
1000Base-T Signal100Base-TX SignalMGT LAN Port Pin
BI_DA+Transmit+1
BI_DA–Transmit–
2
BI_DB+Receive+3
BI_DC+Unused4
BI_DC–
Unused5
BI_DB–Receive–
6
BI_DD+Unused7
BI_DD–
Unused8
Management LAN Port LED Indicators
The Management LAN connectors have integral LED indicators. When lit, these LEDs indicate:
• Green (LINK)—Connection is alive.
Cisco ASR 9000 Series Aggregation Services Router Hardware Installation Guide
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RSP and RP Port Connection Guidelines
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