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Cisco 7401ASR Installation and Configuration Guide
OL-5419-01 B0
Chapter2 Rack-Mounting, Tabletop Installation, and Cabling
Connecting I/O Cables
Figure2-11 Console and Auxiliary Port RJ-45 Connectors
Connecting Native Gigabit Ethernet and Fast Ethernet/Ethernet CablesNote See Chapter 3, “Starting and Configuring,” the “Configuring the Native Gigabit Ethernet and Fast
Ethernet/Ethernet Interfaces” section on page3-15 , for information on configuring and troubleshooting
the Gigabit Ethernet and Fast Ethernet/Ethernet interfaces.
The Cisco 7401ASR router has two Ethernet interfaces and four physi cal E the rne t p orts, two RJ-4 5
(10/100 Mbps) ports and two Gigabit Ethernet (1000 Mbps) ports. Only two of the four po rt s can be i n
use at any one time.
There are two PCI buses. One Gigabit Ethernet (1000) port and on e Fast Et herne t R J -45 ( 10/ 100) po rt
are on the PCI bus 1. The port adapter slot, one Gigabit Ethernet (1000) port, and one Fast Ethernet RJ-45
(10/100) port are on PCI bus 0.
Attaching the Fast Ethernet/Ethernet 10/100 Cables
The RJ-45 ports support IEEE 802.3 (Ethernet) and IEEE 802.3u ( Fast Ethern et) i nte rface s c om pliant
with 10BASET and 100BASETX specifications.
The RJ-45 port supports standard straight-through and crossover Category 5 unshielded twisted-pair
(UTP) cables with RJ-45 connectors. Cisco Systems does not suppl y C ategory 5 U TP cable s; the se
cables are available commercially.
See Appendix A, “Specifications,” for Fast Ethernet RJ-45 port specifications.
Intra-Building Lightning Protection
Shielded cables, which are grounded at both ends are requi red to be used on the 10/100 Ethernet port in
order to be in compliance with requirement R4-11 in GR-108 9-C ore for a Cent ral Office environment.
This is not a requirement for customer premise installations.
1Auxiliary port 4Cable to modem or DCE
2Console port 5Cable to console terminal or DTE
3RJ-45 connector
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