|
|
This chapter describes the NEMI system configuration, including the requirements and procedures for the serial connection, the network configuration, and the SNMP configuration. The Cisco Metro 1500 series system can consist of up to four chassis. The system includes the primary chassis and extension chassis A, B, and C. The NEMI can manage up to two chassis. This being the case, the
Cisco Metro 1500 series system can include up to two NEMIs. Each NEMI must be configured separately for the specific operating environment. The configuration is done using the NEMI interfaces.
The NEMI comes with the following factory-default configuration:
 |
Note If you do not receive a password prompt, an unsupported adapter is being used to connect to the Metro 1500 series serial port. Only use the supplied DB9 to RJ-45 adapter that shipped with the unit. |
The NEMI runs Linux. If you need to reboot the system, the following options exist. They are listed in order of most to least desirable.
To connect a laptop computer to the NEMI you should use a Laplink cable. This cable contains all serial signals and has the handshake signals crossed. See "Cables and Cabling" for complete cable specifications.
Almost any serial communications program can be used, as long as it can be set up to support the factory-default configuration. You can use HyperTerminal, available with Windows 95/98.
Alternatively, you can use the program CRT, which allows connections through serial lines and Telnet through the network and supports a Zmodem upload.
The following instructions assume the laptop modem is connected to the COM2 or COM4 port, leaving the COM1 and COM3 ports available for the Laplink cable.
To connect a laptop computer to the NEMI, follow these steps:
Step 2 Start the HyperTerminal application. Enter a name and icon for the new connection. Select the outgoing communication port. In our example it would be "Direct to Com1" because that is the port to which we connected the cable.
The next screen default settings are 19.2 kbps, 8 bits, no parity, 1 stop bit, hardware flow control. Save these settings for future use.
Step 3 Open the connection to test the connection.
If the NEMI is powered on, the cable is connected properly with the NEMI DB9 linked to the laptop DB9, and the serial line port settings are correct, you should see the Linux login greeting:
unknown login
You can log in as one of the following accounts: root, netadmin, or user.
For administration we recommend using the netadmin account. System setup, typically done once per system, requires root privileges that are obtained with the super user (su) command. The su command prompts the user for the root password.
By default, the NEMI comes configured for a U.S. keyboard.
Use the netconfig command to change the keyboard setting permanently if you are not operating in a U.S. language environment. See Figure 4-1 and Figure 4-2. You can switch temporarily to a German keyboard by entering ge.
It takes a few moments to load the keyboard mapping files. Once you have selected the appropriate keyboard map, use the netconfig test mode to verify that you have chosen the correct mapping. See Figure 4-3 for an example.
If you have selected an incorrect keymap, use one of the following commands to correct the problem:
You must reboot the NEMI before the new keyboard settings take effect. However, the date and time settings (Figure 4-4) can be made using any keyboard mapping.
The NEMI sets the date and time using numbers only. To set the date and time to 27 Feb. 9:55 a.m. 2000, enter 022709552000. The format is MMDDhhmmCCYY, where MM is month, DD is day, hh is hour, mm is minute, CC is century, and YY is year.
|
Note You must reboot for the new date and time settings to take effect. |
Reboot now for the new keyboard and time settings to take effect. Use the Tab key to jump to EXIT to leave the netconfig command, and then enter the reboot command to restart the NEMI with the new settings.
To configure the NEMI for use on an IP network, ask your network administrator for the following information and fill in the blank form available in the
Cisco Metro 1500 Series Operations Guide:
Once you have the necessary information (see "IP Addresses") log into the NEMI using the netadmin account. Enter the su command to gain root privilege and use the netconfig command to enter the above values. This procedure configures the network side of the NEMI. See Figure 4-5 through Figure 4-12 for the configuration screens.
Check your work carefully, and then enter the reboot command to have the new network settings take effect.
After this reboot, if the correct IP addresses and masks have been defined, the NEMI shows up on the network. To test the success of the NEMI network configuration, try to ping the NEMI from another computer that is connected to the same network as the NEMI.
For example, from a Windows 95/98 system, open a DOS window and enter the ping xx.xx.xx.xx command, where xx.xx.xx.xx is the Host IP address you entered during the network configuration of the NEMI.
Once you have installed the NEMI on your network, you can use a program such as CRT or HyperTerminal to make a Telnet connection to the NEMI. Telnet connections are 10 to 20 times faster than the serial communication used during the configuration phase. If you use the Telnet that is supplied with Windows 95, 98, and NT, you will get a better output if you first enter TERM=vt100.
Alternatively, you may choose to run a two-station network using an X cable. This cable is similar to the serial Laplink cable but is used for twisted-pair Ethernet. See "Cables and Cabling."
Now that you have installed this NEMI on your network, you can decide how to manage NEMIs in your environment. Three possible scenarios follow:
PPP options and values can be set with the netconfig command's "Configure your serial communication" option. See Figure 4-13 through Figure 4-22 for examples of this option.
See the "Set Up PPP in Windows 95/98" section for more information on the NEMI default configuration.
The netconfig command provides two reset options. See Figure 4-21 and Figure 4-22 for examples.
 |
Caution Be very careful when using the reset options. They will reset the system from the current configuration to the default factory settings. |
The NEMI can direct SNMP traps to a specific system if it is installed on a permanent network. The netconfig command's "Choose System to receive SNMP traps" option allows just that. You can also use the snmpconfig command to configure more than one system to receive traps or multiple systems to receive classes of traps. See "Command Reference."
To change configuration files and other text-based files, the NEMI makes two text editors available, pico and vi. Pico is a member of the pine mail-kit. The mail-kit is not included with this product. Pico has a very short learning curve because the most often used commands are displayed in the two bottom lines of the screen. For a printed short introduction and a screen shot of pico, see "Command Reference."
To avoid line wrapping in pico, start pico using pico -w filename.
NEMI supports the Network Time Protocol (NTP). NTP synchronizes the time of a computer client or server to another server or reference time source. The time source can be a radio or satellite receiver or modem. NTP provides client accuracies typically within a millisecond on LANs and up to a few tens of milliseconds on WANs relative to a primary server synchronized to Coordinated Universal Time (UTC) through a global positioning service (GPS) receiver. Typical NTP configurations utilize redundant servers and diverse network paths to achieve high accuracy and reliability. Some configurations include cryptographic authentication to prevent accidental or malicious protocol attacks.
|
Note Using the NTP for time zone and time synchronization is optional. |
NTP has many options that depend on the time server setup. You need to be familiar with NTP, the Cisco Metro 1500 series system configuration, and the networking options to complete this setup.
To set up the NTP, follow these steps:
Step 2 Log into the NEMI as root and run the netconfig command. Choose set time-zone to define your local time zone. See Figure 4-23. Exit netconfig, but do not reboot.
|
Note You need to set your local time zone to get your local time. |
Step 3 Enter ntpdate x.x.x.x (where x.x.x.x is a time-server IP address) to set the NEMI clock to a time that is close to the actual time and to check the correctness of the time server address.
Step 4 Enter pico -w /etc/ntp.conf to edit the ntpd configuration file and replace the x.x.x.x of the server lines with the correct IP addresses. Remove the comment character (#) for each line with a valid IP address.
Step 5 Edit the startup file if you want to start ntpd at power on. Enter pico -w /etc/rc.d/rc.inet2 and remove the comment character (#) for the if - fi section near the end of this file. This section starts ntpd.
Step 6 Write out the ntp.conf file by entering Ctrl-X Ctrl-Y.
Step 7 Reboot the system by entering reboot and wait for the ntpd to stabilize.
See the "Downloading a System Update" section for information on downloading and installing system software upgrades as they become available.
Posted: Tue Jun 6 18:32:20 PDT 2000
Copyright 1989 - 2000©Cisco Systems Inc.