Cisco 7206VXR Hardware Guide - Page 19

Chapter 1 Cisco 7200 Series Port Adapter Installation Requirements Installation Requirements Based on the NPE or NSE Installed NPE-225, NPE-200, NPE-175, NPE-150, and NPE-100 Bandwidth Calculation and Configuration Instructions Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 For the I/O controller and each port adapter in your system, check the footnotes in Table 1-6 to see if any apply to your system. If you have any dual-width port adapters in your system, carefully read the port adapter configuration document to see what special conditions apply to these port adapters. Calculate the bandwidth resource requirements. For the I/O controller and each port adapter in your system, go to Table 1-6 and write down the bandwidth resource requirements. Use the blank Bandwidth Calculation Table, page 1-22, to record your requirements. a. High-bandwidth port adapter determination: - For the NPE-225, NPE-200, NPE-175, and NPE-150, make sure you have no more than three high-bandwidth port adapters. - For an NPE-100, make sure you have no more than two high-bandwidth port adapters. b. High- and medium-bandwidth port adapter determination: - For the NPE-225, NPE-200, NPE-175, and NPE-150, make sure you have no more than five high- and medium-bandwidth port adapters. - For an NPE-100, make sure you have no more than four high- and medium-bandwidth port adapters. Calculate the bandwidth points requirements. For the I/O controller and each port adapter in your system, go to Table 1-6 and write down the bandwidth points requirements. Make sure the total number of bandwidth points is less than or equal to 800. Assign each port adapter in your system to a chassis slot. Make sure that the bandwidth points are evenly distributed between the left (odd-numbered slots) and right (even-numbered slots) buses. Include the I/O controller in your determination of balance. Fill the slots in the following order: 2, 1, 4, 3, 6, 5. Check your Cisco IOS release and port adapter SDRAM memory requirements as detailed in Chapter 2, "Memory Requirements." You are finished calculating your port adapter configuration. Note Dual-width port adapters occupy two horizontally aligned port adapter slots when installed in a Cisco 7200 series router; however, dual-width port adapters do not use both PCI bus mb1 (left bus) and PCI bus mb2 (right bus) when operating in the router. The dual-width PA-A2 port adapter uses only PCI bus mb2 (right bus) when installed in a Cisco 7200 series router. The dual-width PA-12E/2FE port adapter autoselects PCI bus mb1 (left bus) or PCI bus mb2 (right bus) based on bandwidth availability-the port adapter selects the PCI bus that has the most available bandwidth. Therefore, do not include the bandwidth points for the PA-12E/2FE when calculating the combined bandwidth point total for a combination of installed port adapters in PCI bus mb1 (left bus) and PCI bus mb2 (right bus). Instead, add the bandwidth points for the PA-12E/2FE to the PCI bus that has the most PCI bus bandwidth availability (the PCI bus the PA-12E/2FE will autoselect) after completing the initial calculation. OL-3875-11 Cisco 7200 Series Port Adapter Hardware Configuration Guidelines 1-11