Allied Telesis at-8700xl series switch IP Addresses and Dhcp, Time and NTP, Diagnosis, Solution

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42AT-8700XL Series Switch User Guide

IP Addresses and DHCP

Problem The switch is enabled as a DHCP server, but cannot assign an IP address to a host.

Solution ■ Reboot the host machine.

■ Check the host’s TCP/IP settings, to make sure that the host is set to obtain its IP address dynamically:

In Windows 95/98, click Settings > Control Panel > Network. Select TCP/

IP and click Properties. Click Obtain an IP address automatically.

In Windows 2000, click Settings > Control Panel > Network and Dial-up Connections > Local Area Connection > Properties. Select Internet connection (TCP/IP) and click Properties. Click Obtain an IP address automatically.

■ Check that the switch’s link to the LAN is functioning, by checking the interface status (Monitoring) and that the link LED is lit (see “Traffic Flow” on page 41).

 

Time and NTP

Diagnosis

The switch’s time is displayed on the Configuration > System > Time tab. It

 

will also be included in log packets.

Problem

The switch’s time does not change, even though you entered the correct time.

Solution

Changing the time is a 3-step process. Select Configuration > System > Time.

 

First, enter a time that is very shortly in the future (e.g. 20 seconds later than

 

the current time). Then check Set time. Then wait until precisely the time you

 

have entered, and click Apply.

Problem

The switch is not assigning the time to devices on the LAN.

Solutions

■ Check NTP is enabled (Configuration > System > Time).

 

■ Check that the NTP peer’s IP address is entered correctly.

 

■ Check that the NTP peer can reach the switch, by pinging the switch from

 

the NTP peer.

 

■ Check that the switch’s link to the LAN is functioning. See “Traffic Flow” on

 

page 41.

Problem The switch’s clock does not synchronise with the NTP peer.

Solution ■ The switch’s clock can only synchronise with the NTP peer if its initial time is similar to the NTP peer’s time (after setting the UTC offset). Manually set the switch’s time so that it is approximately correct, and enable NTP again.

■Check that the UTC offset is correct.

Problem The switch’s time is incorrect, even though it assigns the correct time to devices on the LAN.

Solution The UTC offset is probably incorrect, or needs to be adjusted for the beginning or end of summer time. To correct this, select Configuration > System > Time and enter the correct offset.

Software Release 2.6.1 C613-02030-00 REV B

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Contents AT-8700XL Series Switch Page Contents Switching Why Read this User Guide? ChapterWhere To Find More Information AT-8700XL Series Switch Documentation SetFeatures of the AT-8700XL Series Switch Switching FeaturesTechnical support Management Features Layer 3 and Other FeaturesIntroduction Page Getting Started with the Command Line Interface CLI This ChapterConnecting a Terminal or PC Terminal Communication ParametersLogging Assigning an IP AddressTo change the IP address for an interface, enter the command Setting Routes Changing a Password Choosing a PasswordUsing the Commands AliasesGetting Command Line Help Setting System ParametersLocation of the switch, for example Page Getting Started with the Graphical User Interface GUI What is the GUI? Accessing the Switch via the GUIBrowser and PC Setup Http Proxy Servers Establishing a Connection to the Switch Start hereOption 1 Configuring the Switch before Installation Use this procedure ifOption 2 Installing the Switch into the LAN To install the switch into the same subnet as the PCEnable IP Remoteassign Option 3 Connecting to an Installed Switch Secure Access To create an RSA key pair, use the commandSet the UTC offset System Status System StatusUsing the GUI Navigation and Features Configuration MenuUsing Configuration Pages An example of a configuration page with a selection table Editable Fields Management Menu Ports GraphicDiagnostics Menu Changing the PasswordMonitoring Menu Configuring Multiple Devices Saving Configuration Entered with the GUICombining GUI and CLI Configuration Context Sensitive GUI HelpTo upgrade the GUI Upgrading the GUITroubleshooting Accessing the Switch via the GUI Deleting Temporary FilesTraffic Flow IP Addresses and Dhcp SolutionSolutions Time and NTPLoading Software Page Operating the switch User Accounts and PrivilegesLogin Normal Mode and Security Mode Specific Parameters Remote Management Storing Files in Flash MemoryUsing Scripts Example output from the Show File commandSaving the Switch’s Configuration Storing Multiple ScriptsLoading and Uploading Files File Naming ConventionsLoading Files SPASetting Loader Defaults Example Load a Patch File Using HttpMore information Uploading Files From the SwitchExample Upload a Configuration File Using Tftp To upload a log fileUpgrading Switch Software Example Upgrade to a New Software Release Using To upgrade to a new software releaseFlash Example Upgrade to a new patch file To upgrade to a new patch fileUsing the Built-in Editor Editor screen layoutSnmp and MIBs Snmp MIBs in the AT-8700XL Series Software ReferenceFor More About Operations and Facilities Switch Ports Enabling and Disabling Switch PortsPacket Storm Protection Autonegotiation of Port Speed and Duplex ModePort Trunking Port MirroringVirtual Local Area Networks VLANs Creating VLANs Summary of Vlan tagging rules Protected VLANsVlan Interaction with STPs and Trunk Groups Quality of Service Generic Vlan Registration Protocol GvrpSpanning Tree Protocol STP IP Switching Spanning Tree and Rapid Spanning Tree Port StatesRouting Information Protocol RIP Igmp SnoopingDescription TriggersEvent ParametersPage Maintenance and Troubleshooting How the Switch Starts Up Switch startup messagesHow to Avoid Problems Backup software files Backup configuration scriptWatch for software updates What to Do if You Clear Flash Memory Completely If you accidentally do this, you will need toWhat to Do if Passwords are Lost Getting the Most Out of Technical SupportResetting Switch Defaults Checking Connections Using PingTroubleshooting IP Configurations Telnet FailsYour switch is acting as a Dhcp client Troubleshooting Dhcp IP AddressesUsing Trace Route for IP Traffic Your switch is acting as a Dhcp server

at-8700xl series switch specifications

Allied Telesis AT-8700XL Series Switches are sophisticated networking devices designed to meet the demanding requirements of modern enterprise environments. These managed Ethernet switches are optimized for reliability, performance, and scalability, making them ideal for various applications, from small businesses to large-scale networks.

One of the standout features of the AT-8700XL series is its robust Layer 2 and Layer 3 capabilities. This versatility allows the switches to perform both basic switching and advanced routing functions, facilitating efficient data traffic management. The series supports a wide range of standard protocols, including VLANs, STP, and RSTP, ensuring smooth and flexible network segmentation.

Another critical characteristic is the series' high-speed connectivity options. With multiple Gigabit Ethernet ports, the AT-8700XL series can handle significant data loads, ensuring seamless communication between connected devices. Furthermore, some models within the series offer 10 Gigabit uplink ports, providing the necessary bandwidth to connect to core networks or high-speed servers.

The AT-8700XL series incorporates advanced Quality of Service (QoS) features that enable network administrators to prioritize traffic effectively. This is particularly crucial for applications sensitive to latency, such as VoIP and video conferencing. By ensuring that time-sensitive data packets are transmitted promptly, the switches help maintain optimal performance across the entire network.

Power over Ethernet (PoE) support is yet another advantage of the AT-8700XL series. This feature allows the switches to deliver power to connected devices, such as IP cameras and wireless access points, via the Ethernet cable. This capability simplifies installations by reducing the need for additional power sources, ultimately saving on costs and improving efficiency.

Security is paramount in any network, and the AT-8700XL series does not disappoint. The switches employ robust security protocols, including Access Control Lists (ACLs), MAC address filtering, and DHCP snooping, to protect against unauthorized access and ensure network integrity.

In summary, Allied Telesis AT-8700XL Series Switches offer a comprehensive solution for various networking needs. With their Layer 2 and Layer 3 capabilities, high-speed connectivity, QoS features, PoE support, and security measures, these switches are well-equipped to enhance network efficiency and reliability, making them an excellent choice for organizations looking to future-proof their infrastructure. The AT-8700XL series exemplifies Allied Telesis's commitment to delivering high-quality networking solutions that cater to the evolving demands of businesses today.
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