Cisco Systems Cisco 12406, Cisco 12006 manual Using the Ethernet Port on the PRP

Chapter 3 Installing the Router

Connecting to the Console and Auxiliary Ports

Note Use cables that comply with EIA/TIA-568 standards. (See Table 3-8 on page 3-29 and Table 3-9 on page 3-29 for cable recommendations and specifications.)

Caution The Ethernet ports are used primarily as Telnet ports into the router, and for booting or accessing Cisco IOS 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 3-14 shows an example of the functionality of an Ethernet port. In this example, you cannot access Network 2.0.0.0 via 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 3-14.)

To access Network 2.0.0.0 from Router A, use an interface port on one of the 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 3-14.)

Figure 3-14 Using the Ethernet Port on the PRP

Router A

(Cisco 12000 series)

EO

POS

EO Router B

(Cisco 7500 series)

Network 1.0.0.0

Host A

Host B

	Network 2.0.0.0
	Host A
Router C	S6755
(Cisco 7500 series)

	Cisco 12006 and Cisco 12406 Router Installation and Configuration Guide
3-26	OL-11497-03