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WGSW-1602 16-Port Fast Ethernet Switch with 2 GbE slotsChapter 4 Console Interface
The console, using VT100 terminal emulation, can be accessed from the RS232 serial port or a telnet connection. The switch offers password protection for this interface. All of the following examples of the Consoles User Interface show a screen capture from a telnet session.
When attached to the User Interface via a Telnet Session, the following must be set in order to use the arrow keys: Under the terminal pull down menu choose Properties and make sure the VT100 Arrows option is turned on.
The switch offers a menu-driven interface. The initial welcome screen, seen below in Figure 4-1, requires a password entry in order to proceed. If there is no password set on the system, the Main Menu will be displayed and access is granted immediately. By default, password protection is disabled. If enabled, the default password is switch.
To enable password protection
There are several characteristics to the User Interface pages that are necessary to know before proceeding to use it. The arrow keys may be used to move within menus and sub-screens. At the bottom of every screen are some key commands available to the user for that particular screen, as well as some helpful information. The common key strokes and their definitions and intricacies are listed below:
ESC | |
Select a menu item, edit a field, or accept a value after editing a field. |
|
Delete a table entry |
The main menu displays all the sub-menus that are available. Striking Enter, at a highlighted option, will confirm the choice of the specified sub-menu. As shown in Figure 4-2, there are three menu items to choose from:
To logout of the user interface, hit Ctrl-D at anytime during your telnet session. You will be brought back to the login screen.
Figure 4-2: Main MenuFigure 4-16:VLAN Membership 4.3.1.6 Mirroring4.3.1. System Manager
This menu contains all the options needed to configure the switch to your network. Menu items are:
- General
- IP
- SNMP
- Bridge
- VLAN
- Mirroring
4.3.1.1 General
These parameters include the following:
Figure 4-3: Main Menu: General
System Information Includes system uptime, description, name, contact, location and MAC address Software Download Manages the software version of the switch Password Administration Manages the login password of the switch (For both console and web) System Administration Saves the settings to NVRAM, resets the switch, and restores settings System Information
This screen displays the following:
Figure 4-4 : System Information
- System Description
- System Name- user definable
- System Contact-user definable
- System Location-user definable
- MAC Address
Software Download
Figure 4-5: General: Software DownloadThis screen (see Figure 4-5) allows users to select an image file and the location from where it can be downloaded using TFTP. There are three "Boot from:" options: Net, Net & Save, and Last Saved. (Please refer to Chapter 5 when updating software)
Net option:
This option allows the user to try out a new image before upgrading. It requires a TFTP filename and a server IP address to retrieve the specified image from the given IP address.
The new image will not overwrite the one in the flash.
Net + Copy option
This option requires the same setup as the Net option, i.e. TFTP server and a new image. However, it copies the image to the flash directly and the system boots from the flash afterwards.
Last Saved option
This option will automatically show up after the "Net + Copy" option is selected and the unit is reset.
Warning: The previous image in the flash will be lost when the procedure completes.
Password Administration
Figure 4-6: General: Password AdministrationThis screen allows the user to change the password for both the Console and Web sessions. (Figure 4-6)
To use password protection, you must enable Password Protection.
System Administration
Save all changed made in your session to NVRAM
- Save Configuration to NVRAM
Restore Defaults Restore original settingsReset Switch Restart the switch Figure 4-7: General: System Administration4.3.1.2 IP
This menu manages the IP related information of the system.
Figure 4-8: General: IP
- Enter a site specific IP address, Gateway Address, and Network Mask (or subnet mask). Consult your network administrator for the information.
- Press Ctrl-W to save any changes made.
4.3.1.3 SNMP
This sub-menu allows users to setup three sections as shown (Figure 4-9):
Figure 4-9: SNMP
- Trap Configuration
- Community Table
- Host Authorization
SNMP Trap Configuration
Authentication Traps
When on, the system will generate an SNMP trap upon a host authorization failure. This failure occurs when a host tries to gain access to the system but the host's IP is not in the SNMP host table.
- SNMP Host Table
Figure 4-10: Main Menu: Configuration: SNMP Menu: Host TableThe screen, shown in Figure 4-9, grants a host the access rights to the box.
Host Authorization must be enabled to use the host table. Host Authorization is used as a security feature to limit people who are not listed in the host table from accessing the switch.
If Host Authorization is enabled, the host must be added to this table, through the Console port connection in order for an end station to be access the switch via SNMP or the Web Interface.
Add host
- Enter the host name, IP address, and the community string. Press Enter after each entry to move to the next field.
- In the Status field, press the Spacebar until the desired Status is displayed.
- Press Ctrl-W to save all changes.
SNMP Community Table
Figure 4-11: SNMP: SNMP Community TableThe administrator can create up to eight different community strings with combinations of GET, SET and TRAP privileges. These community strings need to be set prior to setting host access, as the host table depends on the existence of community strings. The public string has all the privileges by default.
4.3.1.4 Bridge
There are several parameters to be set in the Bridge Configuration screen (see Figure 4-12):
Figure 4-12: Bridge
- Spanning Tree Configuration
- Static Bridge Table
- Bridge Aging
Spanning Tree Configuration
If Spanning Tree is disabled the next four values are ignored. When enabled they do need to be set.
- Hello Time
Interval between configuration messages sent by the spanning tree algorithm- Max Age
Amount of time before a configuration message is discarded by the system- Forward Delay
Amount of time system spends in "learning" and "listening" states- Bridge Priority
Priority setting among other switches in the spanning treeStatic Bridge Table
Figure 4-13: Bridge: Static Bridge TableThe Static Bridge Table, Figure 4-12, allows the administrator to specify Media Access Control (MAC) addresses for specific ports that will not be purged from the bridge table by the aging function.
Add an entry
- Type the MAC address under the first column, and hit Enter.
- Enter the port number, which is associated with the MAC address.
If all the information is correct, the new entry will appear in the list below, which is in order by port ID. Otherwise, an error message will be displayed and the cursor will return to the MAC Address field.
Remove an entry
- Tab down to the entry and press Ctrl-X. ESC will return to the previous menu.
Bridge Aging
Figure 4-14: Bridge: Bridge AgingThe aging time is the amount of time that an entry is kept in the bridge tables prior to being purged (or aged). The range (in parentheses) represents the minimum and the maximum values that the timer can be set.
4.3.1.5 VLAN
The VLAN settings are as follows:
Figure 4-15: VLANVLAN Administration
Up to 16 VLANs with unique ID numbers and names can be added. VLAN ID numbers must be in the range of 1-4094.
Add a VLAN
- Type a unique numeric VLAN ID and hit Enter
- Type a unique VLAN name and hit Enter
Remove a port or an entire VLAN
- To remove an entire VLAN, just press Ctrl-X anywhere on that line
VLAN Membership
"U" or "T" will be displayed for each port assigned to the VLAN (see Figure 4-15), where "U" stands for untagged and "T" for tagged. A "_" space indicates that the port is not a member of the particular VLAN. VLAN tagging is a standard set by the IEEE to facilitate the spanning of VLANs across multiple switches. (Reference: Appendix A and IEEE Std 802.1Q-1998 Virtual Bridged Local Area Networks)This matrix allows for real time management of up to 16 VLANs. To add a port to a VLAN, position the cursor in the desired matrix location and toggle the options with the SPACE bar.
A
This menu option allows users to enable the Port Mirroring capability (see Figure 4-17 and Section 3.11). Users need to specify both the Source and Monitor port. The Monitor port will show a copy of every packet that arrives and departs at the Source port.
Figure 4-17: Port Mirroring4.3.2. Port Manager
The Port Manager settings are as follows:
Figure 4-18: Port Manager43.2.1 All Ports
Port Configuration, users can arrange the port characteristics related to link operations (see Figure 4-19). All of the parameters on this page are toggle settings. To switch or toggle between selections simply strike the space bar.
Admin Status field
Allows Administrator to Enable or Disable the port.
Speed field
The choices are 10Mbps, 100Mbps, and Auto (Auto-negotiate with the speed of the attached device).
Duplex field
Offers the choice of Full, Half, or Auto (will auto-detect the value of the attached device and set the port duplex accordingly).
Port Security field
When enabled, Port Security allows the administrator to specify which workstations on that port will be allowed to send packets into the switch. Only workstations, whose MAC address and switch port number are entered into the Static Bridge Table, will be allowed to send packets into the switch. (Note: The filtering occurs only for packets sent from the "Secured" ports to other ports. All packets sent from other ports to the "Secured" port will be sent without any filtering).
Flow Control
Flow control stops the sender from sending data until the receiver can accept it.
Figure 4-19: Port Manager: All Ports4.3.2.2 Group Configuration
Group setup allows you to make identical changes to multiple ports at the same time. First setup up a group under the "group setup" option, then changes can be made under "Port Configuration", "Spanning Tree Configuration", and "VLAN Membership" menus.
Contains:
Figure 4-21: Group SetupThere are three options for setting up the group.
- Specific Ports
- No Ports
- All Ports
Specific Ports:
Allows you to add or remove one port at a time.
No Ports:
Deletes all ports from the group.
All Ports:
Adds all ports to the group.
Figure 4-22: Port ConfigurationThe following parameters are accessible from this screen:
- Duplex
- Data rate
- Default VLAN
- Comments
- Admin Status
- Source Security
- Flow control
Please note that changes made in this screen will immediately change the setting for all the ports in the group.
Changes to the Spanning Tree Priority and Cost can be made here. All ports in the group will be affected.
Hitting the SPACE bar will toggle the VLAN membership status for all ports in the group.
4.3.2.3 Port SpecificContains:
Port Configuration
Spanning Tree Configuration
VLAN Membership
The options here are similar to those in the group configuration menus. The difference is that only the specified port will be changed.
The upper half of this screen shows the current status for the following parameters:
- Link Status
- Duplex
- Data Rate
- Port State
The lower half of the screen will allow you to make changes to the port settings.
The Spanning Tree Priority and Cost can be set here for the specified port.
Hitting the SPACE bar will toggle the VLAN membership status for the specified port.
4.3.3. StatisticsThere are two sections in this screen. The left-side Port-ID field allows users to choose a port to be observed. The central portion of the screen displays the basic statistics associated with the port, which is highlighted at the Port-ID field.
Figure 4-29: Statistics
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