Installation guide
Table Of Contents
- Chapter 1: Introduction
- Chapter 2: Initial Configuration
- Chapter 3: Configuring the Switch
- Using the Web Interface
- Navigating the Web Browser Interface
- Panel Display
- Main Menu
- Basic Configuration
- Displaying System Information
- Displaying Switch Hardware/Software Versions
- Displaying Bridge Extension Capabilities
- Setting the Switch’s IP Address
- Enabling Jumbo Frames
- Managing Firmware
- Saving or Restoring Configuration Settings
- Console Port Settings
- Telnet Settings
- Configuring Event Logging
- Resetting the System
- Setting the System Clock
- Simple Network Management Protocol
- User Authentication
- Configuring User Accounts
- Configuring Local/Remote Logon Authentication
- Configuring Encryption Keys
- AAA Authorization and Accounting
- Configuring HTTPS
- Replacing the Default Secure-site Certificate
- Configuring the Secure Shell
- Configuring Port Security
- Configuring 802.1X Port Authentication
- Web Authentication
- Network Access - MAC Address Authentication
- MAC Authentication
- Access Control Lists
- Port Configuration
- Address Table Settings
- Spanning Tree Algorithm Configuration
- VLAN Configuration
- Link Layer Discovery Protocol
- Class of Service Configuration
- Quality of Service
- VoIP Traffic Configuration
- Multicast Filtering
- Multicast VLAN Registration
- DHCP Snooping
- IP Source Guard
- IP Clustering
- UPnP
- Chapter 4: Command Line Interface
- Using the Command Line Interface
- Entering Commands
- Command Groups
- Line Commands
- General Commands
- System Management Commands
- Flash/File Commands
- Authentication Commands
- Access Control List Commands
- SNMP Commands
- Interface Commands
- Mirror Port Commands
- Rate Limit Commands
- Link Aggregation Commands
- Address Table Commands
- LLDP Commands
- lldp
- lldp holdtime-multiplier
- lldp medFastStartCount
- lldp notification-interval
- lldp refresh-interval
- lldp reinit-delay
- lldp tx-delay
- lldp admin-status
- lldp notification
- lldp mednotification
- lldp basic-tlv management-ip-address
- lldp basic-tlv port-description
- lldp basic-tlv system-capabilities
- lldp basic-tlv system-description
- lldp basic-tlv system-name
- lldp dot1-tlv proto-ident
- lldp dot1-tlv proto-vid
- lldp dot1-tlv pvid
- lldp dot1-tlv vlan-name
- lldp dot3-tlv link-agg
- lldp dot3-tlv mac-phy
- lldp dot3-tlv max-frame
- lldp dot3-tlv poe
- lldp medtlv extpoe
- lldp medtlv inventory
- lldp medtlv location
- lldp medtlv med-cap
- lldp medtlv network-policy
- show lldp config
- show lldp info local-device
- show lldp info remote-device
- show lldp info statistics
- UPnP Commands
- Spanning Tree Commands
- spanning-tree
- spanning-tree mode
- spanning-tree forward-time
- spanning-tree hello-time
- spanning-tree max-age
- spanning-tree priority
- spanning-tree pathcost method
- spanning-tree transmission-limit
- spanning-tree mst-configuration
- mst vlan
- mst priority
- name
- revision
- max-hops
- spanning-tree spanning-disabled
- spanning-tree cost
- spanning-tree port-priority
- spanning-tree edge-port
- spanning-tree portfast
- spanning-tree link-type
- spanning-tree loopback-detection
- spanning-tree loopback-detection release-mode
- spanning-tree loopback-detection trap
- spanning-tree mst cost
- spanning-tree mst port-priority
- spanning-tree protocol-migration
- show spanning-tree
- show spanning-tree mst configuration
- VLAN Commands
- Priority Commands
- Quality of Service Commands
- Voice VLAN Commands
- Multicast Filtering Commands
- Multicast VLAN Registration Commands
- IP Interface Commands
- IP Source Guard Commands
- DHCP Snooping Commands
- IP Cluster Commands
- Appendix A: Software Specifications
- Appendix B: Troubleshooting
- Glossary
- Index
Basic Configuration
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3
Figure 3-21 SNTP Configuration
CLI – This example configures the switch to operate as an SNTP unicast client and
then displays the current time and settings.
Configuring NTP
The NTP client allows you to configure up to 50 NTP servers to poll for time updates.
You can also enable authentication to ensure that reliable updates are received from
only authorized NTP servers. The authentication keys and their associated key
number must be centrally managed and manually distributed to NTP servers and
clients. The key numbers and key values must match on both the server and client.
Command Attributes
• NTP Client – Configures the switch to operate as an NTP client. This requires at
least one time server to be specified in the NTP Server list. (Default: Disabled)
• NTP Polling Interval – Sets the interval between sending requests for a time
update from NTP servers. (Range: 16-16384 seconds; Default: 16 seconds)
• NTP Authenticate – Enables authentication for time requests and updates
between the switch and NTP servers. (Default: Disabled)
• NTP Server – Sets the IP address for an NTP server to be polled. The switch
requests an update from all configured servers, then determines the most accurate
time update from the responses received.
• Version – Specifies the NTP version supported by the server. (Range: 1-3;
Default: 3)
Console(config)#sntp server 10.1.0.19 137.82.140.80 128.250.36.2 4-65
Console(config)#sntp poll 60 4-66
Console(config)#sntp client 4-64
Console(config)#exit
Console#show sntp
Current time: Jan 6 14:56:05 2004
Poll interval: 60
Current mode: unicast
SNTP status : Enabled
SNTP server 10.1.0.19 137.82.140.80 128.250.36.2
Current server: 128.250.36.2
Console#