Cisco Systems manual Cisco XR 12404 Router Installation Guide

Chapter 3 Installing the Router

Connecting the PRP to an Ethernet Network

RJ-45 cables are not available from Cisco Systems, but are available from outside commercial cable vendors.

Note Only connect cables that comply with EIA/TIA-568 standards. See Table 3-4and Table 3-5for cable recommendations and specifications.

Note To comply with Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety, connect all console, auxiliary, and Ethernet interfaces only to intrabuilding or non-exposed wiring or cabling. The intrabuilding cable must be shielded and the shield must be grounded at both ends.

Caution The Ethernet ports are primarily used as a Telnet port into the Cisco XR 12000 Series Router, and for booting or accessing Cisco IOS XR software images over a network to which an Ethernet port is directly connected. Cisco Express Forwarding (CEF) functions are switched off by default for security reasons. Cisco strongly cautions you to consider the security implications of switching on CEF routing functions on these ports.

Figure 3-10is an example of the functionality of an Ethernet port. In this example, you cannot access Network 2.0.0.0 through the Ethernet port (ETH0) on the PRP in router A; you can only access the hosts and router C, which are in Network 1.0.0.0 (see dotted arrows in Figure 3-10).

To access Network 2.0.0.0 from router A, you must use an interface port on one of your line cards (in this example, a Packet-over-SONET (POS) line card in router A) to go through router B, through router C, and into Network 2.0.0.0 (see solid arrows in Figure 3-10).

	Cisco XR 12404 Router Installation Guide
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