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Author: l | 2025-04-24

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To Configure ToD, and TFTP Services See the following configuration tasks required to configure time-of-day service, and TFTP service on a Cisco CMTS: Configuration Examples This section provides examples for the following configurations: ToD Server Example The following example shows a typical ToD server configuration: service udp-small-servers max-servers no-limit cable time-server These are the only commands required to enable the ToD server. TFTP Server Example The following lines are an excerpt from a configuration that includes a TFTP server. Change the files listed with the tftp-server command to match the specific files that are on your system. ! Enable the user of unlimited small servers service udp-small-servers max-servers no-limit!...! Enable the TFTP server and specify the files that can be! downloaded along with their aliases tftp-server disk0:gold.cm alias gold.cm tftp-server disk0:silver.cm alias silver.cm tftp-server disk0:bronze.cm alias bronze.cm tftp-server disk0:ubr924-k8y5-mz.bin alias ubr924-codefile tftp-server disk0:ubr925-k9v9y5-mz.bin alias ubr925-codefile Additional References Technical Assistance Description Link The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies. To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds. Access to most tools on the Cisco Support website requires a Cisco.com user ID and password. Feature Information for the DHCP, ToD, and TFTP Services for the CMTS Routers Use Cisco Feature Navigator to find information about the platform support As a network engineer, we can garuentee you there will come a point in your career where you must upgrade the Cisco IOS on a Router or Switch. This lab will discuss and demonstrate the upgrade the Cisco IOS update procedure.Real World ApplicationUpgrading the IOS on a Cisco device is a common task among Cisco Engineers as New IOS Images typically are released within 3 months give or take. New releases include bug fixes and new features available to the device. Upgrading the Cisco IOS on a Router or Switch is a MUST KNOW for any Cisco Network Engineer.Lab PrerequisitesBoot R1 in the Free CCNA workbook GNS3 Lab Topology.Establish an active Console Session to R1A Newer Cisco IOS Image compatible with your Cisco Device.A TFTP Server is required for this lab. You may need to download Solarwinds TFTP Server and configure it prior to attempting this lab.Lab ObjectivesIf needed, Download and Install Solarwinds TFTP Server.Place the New Cisco IOS Image file in the TFTP Server Root Directory.Configure your TFTP Server and Cisco device to be within the same ip subnet, ie; 10.1.1.1/24 & 10.1.1.2/24Ensure you have Ethernet connectivity from your TFTP server to the Cisco device which you’re upgrading.Copy the new image file from the tftp server to your Cisco device, you will be prompted to erase the flash memory.Once the new Cisco IOS Image is copied to the device flash memory, reboot the device and verify the upgrade was successful.Lab InstructionPlease note that this lab requires a REAL Cisco Router or Switch to perform as GNS3 does not load images from flash memory. You can however perform this procedure on GNS3 but you will not be able to reboot the device and verify a successful upgrade.Upgrading the Internetwork Operating System (IOS) on a Cisco device is a pretty common procedure as updated IOS images are released at least once every three months to fix bugs and provide new features and enable new device hardware.First off you’ll need a TFTP server installed and running on your PC with a crossover cable running from your PC to a router, or a regular patch cable running from the PC to a switch.To complete the 3rd objective of this lab you’ll need a console session to a Cisco router or Switch. Ensure that the IP Address you’re assigning to the Cisco device is in the same subnet as the PC. For this lab, we’ll use 10.1.1.1/24 for the PC and 10.1.1.2/24 for the Cisco device. The objective requires you to configure the IP address on the Ethernet interface connected to the PC. In the example shown below, interface FastEthernet0/0 is directly connected to the PC;Router con0 is now availablePress RETURN to get started.Router>enablePassword:

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The ToD server on the Cisco CMTS. Step 5 exit Example: Router(config)# exitRouter# Exits global configuration mode. Disabling Time-of-Day Service To disable the ToD server, use the following procedure, beginning in EXEC mode. Procedure Command or Action Purpose Step 1 enable Example: Router> enableRouter# Enables privileged EXEC mode. Enter your password if prompted. Step 2 configure terminal Example: Router# configure terminal Router(config)# Enters global configuration mode. Step 3 no cable time-server Example: Router(config)# cable time-serverRouter(config)# Disables the ToD server on the Cisco CMTS. Step 4 no service udp-small-servers Example: Router(config)# no service udp-small-servers Router(config)# (Optional) Disables the use of all minor UDP servers. Note Do not disable the minor UDP servers if you are also enabling the other DHCP or TFTP servers. Step 5 exit Example: Router(config)# exit Router# Exits global configuration mode. Configuring TFTP Service To configure TFTP service on a Cisco CMTS where the CMTS can act as a TFTP server and download a DOCSIS configuration file to cable modems, perform the following steps: Create the DOCSIS configuration files using the DOCSIS configuration editor of your choice. Copy all desired files (DOCSIS configuration files, software upgrade files, and Cisco IOS configuration files) to the Flash memory device on the Cisco CMTS. Typically, this is done by placing the files first on an external TFTP server, and then using TFTP commands to transfer them to the router’s Flash memory. Enable the TFTP server on the Cisco CMTS with the tftp-server command. Each configuration task is required unless otherwise listed. Cisco Tftp software free downloads. Cisco Tftp shareware, freeware, demos: DSS TFTP Server by KN DATASERVICE, CiscoKits CCNA TFTP Server by CiscoKits LLC, Cisco CDP Monitor Tftp Cisco Server, free tftp cisco server freeware software downloads

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Host account and access their Webex Meetings, if the meeting site requires credentials. Important If you specify an invalid meeting site, users cannot add, or edit, any meetings sites in the client user interface. Example: Meeting_Site_URL Meeting_Server_Address_Backup Applies to all the Cisco Jabber clients. Specifies the secondary Cisco Webex Meetings site URL for users. Example: meeting_site_URL Meeting_Server_Address_Backup2 Applies to all the Cisco Jabber clients. Specifies the tertiary Cisco Webex Meetings site URL for users. Example: meeting_site_URL TftpServer1 Applies to all the Cisco Jabber clients. Specifies the address of the primary Cisco Unified Communications Manager TFTP service where device configuration files reside. Set one of the following as the value: Hostname (hostname) IP address (123.45.254.1) FQDN (hostname.domain.com) You should set this parameter in the client configuration only if: You deploy the client in phone mode. The TFTP server address for the device configuration is different to the TFTP server address for the client configuration. During installation, you should set the address of the TFTP server where the client configuration file resides with the following argument: TFTP. Example: hostname TftpServer2 Applies to all the Cisco Jabber clients. Specifies the address of the secondary Cisco Unified Communications Manager TFTP service. Example: hostname useCUCMGroupForCti Applies to the Cisco Jabber desktop clients. Specifies if the Cisco Unified Communications Manager Group handles load balancing for CTI servers. Set one of the following values: true—The Cisco Unified Communications Manager Group handles CTI load balancing. You should set this value in phone mode deployments only. In full UC mode, the presence server automatically handles CTI load balancing. false (default)—The Cisco Unified Communications Manager Group does not handle CTI load balancing. Example: true UseSIPforMobiles Applies to Cisco Jabber for mobile clients. Specifies that SIP URIs are always shown, even if in the same domain. true—Always show SIP URI, even for the same domain. false (default)—Show domain name for the same domain, and show SIP URI for different domains. Nodes.Log into Publisher’s Cisco Unified ServiceabilityCisco Unified Serviceability > Tools > Control Center - Feature Services.Beginning with the Publisher then continue with the TFTP, followed by subscribers one by one, restart Cisco CallManager Service where running.Cisco Unified Serviceability > Tools > Control Center - Feature Services.Beginning with the Publisher then continue with the TFTP, followed by subscribers one by one, restart Cisco CTIManager Service only where running.Cisco Unified Serviceability > Tools > Control Center - Network Services.Beginning with the Publisher then continue with the TFTP, followed by subscribers one by one, restart Cisco Trust Verification Service (TVS).Cisco Unified Serviceability > Tools > Control Center - Feature Services.Beginning with the Publisher then continue with the TFTP, followed by subscribers one by one, restart Cisco Tftp Service only where running.Reboot all Phones.Cisco Unified CM Administration > System > Enterprise Parameters.Select Reset then you will see a pop-up with the statement You are about to reset all devices in the system. This action cannot be undone. Continue?,select OK and then select Reset.Phones will now upload the new ITL while they reboot.IPSEC CertificateNote: IPSEC certificates will affect the DRF master and local service witch deals with backup and restore.Open a GUI for each node in the cluster starting with the publisher, then each subscriber/TFTP and navigate to Cisco Unified OS Administration > Security > Certificate Management.On all of the GUI pages beginning with the publisher Click “Find” showing all the certificates.Click on the “IPSEC.pem” Certificate.Once open Click “Regenerate” Wait until you see “Success” then

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DHCP, ToD, and TFTP Services for CMTS Routers Note Cisco IOS-XE Release 16.5.1 integrates support for this feature on Cisco CMTS routers. This document describes how to configure Cisco Cable Modem Termination System (CMTS) platforms so that they support onboard servers that provide Dynamic Host Configuration Protocol (DHCP), Time-of-Day (ToD), and Trivial File Transfer Protocol (TFTP) services for use in Data-over-Cable Service Interface Specification (DOCSIS) networks. In addition, this document provides information about optional configurations that can be used with external DHCP servers. Prerequisites for DHCP, ToD, and TFTP Services To use the Cisco CMTS as the ToD server, either standalone or with other external ToD servers, you must configure the DHCP server to provide the IP address of the Cisco CMTS as one of the valid ToD servers (DHCP option 4) for cable modems. Restrictions for DHCP, ToD, and TFTP Services The ToD server must use the UDP protocol to conform to DOCSIS specifications. For proper operation of the DOCSIS network, especially a DOCSIS 1.1 network using BPI+ encryption and authentication, the system clock on the Cisco CMTS must be set accurately. You can achieve this by manually using the set clock command, or by configuring the CMTS to use either the Network Time Protocol (NTP) or the Simple Network Time Protocol (SNTP). Cisco cBR series routers do not support internal DHCP servers. Information About DHCP, ToD, and TFTP Services This section provides the following information about the DHCP, ToD, and TFTP Services feature, and its individual components: Feature

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Update the CTL file. The link to the CTL phone security guide can be found at this link. a GUI for each server in the cluster starting with the publisher, then each subscriber/TFTP in sequence and navigate to Cisco Unified OS Administration > Security > Certificate ManagementOn all of the GUI pages beginning with the publisher Click “Find” showing all the certificates.Click on the “CAPF.pem” Certificate.Once open Click “Regenerate” Wait until you see “Success” then close pop-up or go back to “Find/List”.Remove the outdated CAPF certificate from the trust store on each node after regeneration of new.Continue with subsequent Subscribers, follow the same procedure in step 3-4 on all subscribers in the cluster.After all nodes have regenerated the CAPF certificate, the following services needs to be restarted in the following order:Log into Publisher’s Cisco Unified Serviceability.Cisco Unified Serviceability > Tools > Control Center - Feature Services.Beginning with the Publisher then continue with the TFTP, followed by subscribers one by one, restart Cisco Certificate Authority Proxy Function Service ONLY where running. (Even if not running on any node, continue with instructions).Cisco Unified Serviceability > Tools > Control Center - Network Services.Beginning with the Publisher then continue with the TFTP, followed by subscribers one by one, restart Cisco Trust Verification Service (TVS).Cisco Unified Serviceability > Tools > Control Center - Feature Services.Beginning with the Publisher then continue with the TFTP, followed by subscribers one by one, restart Cisco Tftp Service only where running.Reboot all Phones.Cisco Unified CM Administration > System > Enterprise. Cisco Tftp software free downloads. Cisco Tftp shareware, freeware, demos: DSS TFTP Server by KN DATASERVICE, CiscoKits CCNA TFTP Server by CiscoKits LLC, Cisco CDP Monitor Tftp Cisco Server, free tftp cisco server freeware software downloads

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Getting Cisco phones working with asterisk may seem like a daunting procedure; getting SIP firmware installed on the phone, loading up the the firmware files in the tftp server, fearing that you will somehow brick the phone by an incomplete firmware upload…But I am here to reassure you that once you understand how Cisco phones update themselves, the fear and trepidation will subside.Cisco 79xx IP PhoneIn fact, Cisco phones are simple. They just need a tftp server to update its firmware and it doesnt even have to be located on the asterisk/phone system itself. 7940/60 Cisco phones update in two stages. The bootloader, then the application. Once the bootloader is upgraded, all passwords and networking information on the phone will be wiped out. But what is essential in upgrading these phones is a DHCP server with option 150 enabled – an option to auto-provision the tftp server ip address when the DHCP server hands out the regular ip address to the phone.Without an auto-provisioned tftp server address, the phone will only complete half the upgrade and come up with an error message of “protocol application invalid.” This just means that the phone could not complete the second half of the upgrade and needs the tftp ip address to be specified. Only problem is since there is no application running, there is no place to specify the address! Thank goodness for DHCP option 150 which does this for us when the phone grabs an IP address after loading the bootloader.Below are instructions to upgrade/convert any Cisco 7940, 7941, 7960, 7961, 7970, 7971, 7942, 7962, 7945, 7965 IP phone to any firmware you want from the Cisco web site (SIP/SCCP), and to recover any cisco phone which may have screwed up somehow while upgrading firmware (like if you get the protocol application