CIT 384: Network Administration Router Configuration CIT 384: Network Administration

CIT 384: Network Administration Topics Cisco 2960 IOS CLI Differences IOS Upgrades Booting CIT 384: Network Administration

Routing at Network Layer Forwards IP frames between two networks. A router is a specialized computer dedicated to routing. Router OS Cisco IOS Juniper JUNOS Linux Application Presentation Session Transport Network Data Link Physical CIT 384: Network Administration

CIT 384: Network Administration Cisco 2960 Router Two 10/100 Mbps Ethernet ports Supports variety of modules WAN interfaces VoIP Wireless CIT 384: Network Administration

CIT 384: Network Administration Accessing the IOS CLI Serial console. AUX port modem Network: telnet Network: ssh CIT 384: Network Administration

CIT 384: Network Administration IOS CLI Differences Configuration of IP addresses. Setup mode questions. Routing table. Routing protocols. CIT 384: Network Administration

CIT 384: Network Administration Router Modes CIT 384: Network Administration

CIT 384: Network Administration IOS Upgrade Process CIT 384: Network Administration

CIT 384: Network Administration IOS Upgrade Procedure R1#copy tftp flash c System flash directory: File Length Name/status 1 7530760 c4500-d-mz.120-2.bin [7530824 bytes used, 857784 available, 8388608 total] Address or name of remote host [255.255.255.255]? 134.141.3.33 Source file name? c4500-d-mz.120-5.bin Destination file name [c4500-d-mz.120-5.bin]? Accessing file c4500-d-mz.120-5.bin on 134.141.3.33... Loading c4500-d-mz.120-5.bin from 134.141.3.33 (via Ethernet0): ! [OK] Erase flash device before writing? [confirm] Flash contains files. Are you sure you want to erase? [confirm] Copy 'c4500-d-mz.120-5.bin ' from server y as 'c4500-d-mz.120-5.bin ' into Flash WITH erase? [yes/no]y Erasing device... eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee ...erased Loading c4500-d-mz.120-5.bin from 134.141.3.33 (via Ethernet0): !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! (leaving out lots of exclamation points) [OK 7530760/8388608 bytes] Verifying checksum... OK (0xA93E) Flash copy took 0:04:26 [hh:mm:ss] CIT 384: Network Administration

CIT 384: Network Administration IOS Boot Sequence CIT 384: Network Administration

CIT 384: Network Administration Starting IOS CIT 384: Network Administration

CIT 384: Network Administration boot system Router uses boot system commands in NVRAM to locate IOS. Router# configure terminal Router(config)# boot system flash c2800k9_42-18.bin boot system tftp c2800-1.bin 10.1.1.1 boot system rom exit copy running-config startup-config After a reload, router will try these in the order they were entered. CIT 384: Network Administration

CIT 384: Network Administration IOS Image Naming Platform Feature Set File Format (RAM Compressed) flash:c2800nm-advsecurityk9-mz.124-13b.bin Version (12.4) Patch Level Encryption (3DES) Location of Image CIT 384: Network Administration

IOS Feature Set Inheritance Image from IOS in a Nutshell, 2nd ed CIT 384: Network Administration

Configuration Register Bit Number Hex Meaning 00-03 0000-000F Boot parameter 0000: stay at boot prompt 0001: boot IOS from ROM 0002-000F: normal boot sequence 06 0040 Ignore NVRAM contents 07 0080 Disable boot messages 08 0100 Break disabled 10 0400 IP broadcast will all zeros 5,11,12 0020,0800,1000 Console line speed 13 2000 Boot default ROM if net boot fails 14 4000 IP broadcasts don’t have net numbers 15 8000 Enables diagnostics; ignores NVRAM CIT 384: Network Administration

Common Register Settings Configuration Register Router Behavior 0x2102 Boot into ROM if boot fails. Ignores break. 9600 bps console speed 0x2142 Boots into ROM if boot fails. Ignores NVRAM configuration. 0x3122 57600 bps console speed. CIT 384: Network Administration

CIT 384: Network Administration References James Boney, Cisco IOS in a Nutshell, 2nd edition, O’Reilly, 2005. Cisco, Cisco Connection Documentation, http://www.cisco.com/univercd/home/home.htm Cisco, Internetworking Basics, http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/introint.htm Wendell Odom, CCNA Official Exam Certification Library, 3rd edition, Cisco Press, 2007. CIT 384: Network Administration