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3. This length is specifically between any two stations on a repeated segment. Table 5 lists IEEE 802.3u physical characteristics for 100BASE-TX. Table 5 IEEE 802.3u Physical Characteristics Parameter 100BASE-TX Data rate (Mbps) 100 Signaling method Baseband Maximum segment length 100 m between DTE1 and repeaters Media Category 5 UTP (for RJ-45) Topology Star/Hub 1. DTE = data terminal equipment. OL-11656-01 Performance Route Processor Installation and Configuration Guide 47 Configuring Interfaces on the PRP Ethernet Interface Cable Connection Procedure The RJ-45 receptacles on the PRP-1 provide two physical connection options for Ethernet interfaces and three physical connections on the PRP-2. RJ-45 cables are not available from Cisco Systems; they are available from commercial cable vendors. To connect cables to the PRP Ethernet interfaces (ports labeled ETH0, ETH1 and ETH2; see Figure 8 and Figure 9), attach the Category 5 UTP cable directly to an RJ-45 receptacle on the PRP. The Ethernet interfaces on the PRP are end-station devices, not repeaters; therefore, you must connect an Ethernet interface to a repeater or hub. Note Only connect cables that comply with EIA/TIA-568 standards. (See Table 4 and Table 5 for cable recommendations and specifications.) Note To comply with Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety, connect all console, auxiliary, Ethernet, and BITS (PRP2) interfaces only to intrabuilding or nonexposed wiring or cabling. The intrabuilding cable must be shielded and the shield must be grounded at both ends. Caution The Ethernet ports are used primarily as Telnet ports into the Cisco 12000 Series 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 13 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 13.) 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 13.) 48 Performance Route Processor Installation and Configuration Guide OL-11656-01 Configuring Interfaces on the PRP Figure 13 Using the Ethernet Port on the PRP 49 Performance Route Processor Installation and Configuration Guide OL-11656-01 Configuring the Ethernet Interfaces The IEEE 802.3 Ethernet interfaces, located on the PRP, allow connections to external Ethernet networks and are capable of data transmission rates of 10 Mbps and 100 Mbps. The transmission speed of the Ethernet ports is auto-sensing by default and is user configurable. Caution An Ethernet port is used primarily as a Telnet port into the Cisco 12000 Series Router, or 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. The following sections provide two methods for configuring the Ethernet interface: • Using Configuration Mode to Configure an Ethernet Interface • Using the Setup Command Facility to Configure an Ethernet Interface Router A (Cisco 12000 series) Router B (Cisco 7500 series) Router C (Cisco 7500 series) POS EO Host A Network 1.0.0.0 EO Host B S6755 Host A Network 2.0.0.0 Configuring Interfaces on the PRP Using Configuration Mode to Configure an Ethernet Interface To perform a basic configuration of an Ethernet interface in configuration mode, follow these steps: Step 1 At the privileged-level prompt, enter configuration mode and specify that the console terminal is the source of the configuration subcommands as follows: Router# configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)# Step 2 At the configuration mode prompt, specify the Ethernet interface by entering the subcommand interface, followed by the type (ethernet) and port (0) as follows: Router(config)# interface ethernet 0 Router(config-if)# Step 3 If IP routing is enabled on the system, you can assign an IP address and subnet mask to the interface with the ip address configuration subcommand, as in the following example: Router(config-int)# ip address 1.1.1.10 255.255.255.0 Step 4 Add any additional configuration subcommands required to enable or disable routing protocols (such as the no ip mroute-cache command) and to set other interface charact...

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