--- title: "Meaning & Key Takeaway of: The configuration in Example 33-8 works…" description: "\"“The configuration in Example 33-8 works, but in many cases, routers might have multiple ntp server commands configured for redundancy. The goal is to ..." image: "https://sms4smile.com/quotes/i/9f4/wendell-odom-19707_ntp-server_the-configuration-in-example-33-8-works_2800212.jpg" --- # The configuration in Example 33-8 works, but in many… ![“The configuration in Example 33-8 works, but in many cases, routers might have multiple ntp server commands configured for redundancy. The goal is to have at least one usable clock source (servers per multiple ntp server commands, or internal clock as per the ntp master command). The router then…” quote by Wendell Odom](https://sms4smile.com/quotes/i/9f4/wendell-odom-19707_ntp-server_the-configuration-in-example-33-8-works_2800212.jpg) [Download](https://sms4smile.com/quotes/i/9f4/wendell-odom-19707_ntp-server_the-configuration-in-example-33-8-works_2800212.jpg) [Open image](https://sms4smile.com/quotes/i/9f4/wendell-odom-19707_ntp-server_the-configuration-in-example-33-8-works_2800212.jpg) > ““The configuration in Example 33-8 works, but in many cases, routers might have multiple ntp server commands configured for redundancy. The goal is to have at least one usable clock source (servers per multiple ntp server commands, or internal clock as per the ntp master command). The router then chooses the best NTP clock source based on the stratum level. The stratum level defines the quality of the clock source; the lower the stratum, the better the source.”” [Wendell Odom](https://sms4smile.com/quotes/author/wendell-odom/) ## About This Quote This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation. Routers can list multiple NTP servers for redundancy, selecting the best based on stratum, which indicates clock quality. **In simple terms:** Multiple NTP servers provide backup; lower stratum means better clock. Key Takeaway Configure several NTP servers and let the router pick the optimal one. Themes redundancy network reliability time synchronization Mood technical practical Type instructional operational When to use this quote - enterprise routers - data center timing - remote office synchronization Key Concepts NTP stratum clock source selection Questions to Reflect On - How do you verify stratum levels of NTP servers? - What fallback occurs if all servers fail? A Different Perspective If all servers share the same stratum, redundancy offers no quality improvement. ★ ★ ★ ★ ★ No ratings yet ## Related quotes > [“NTP Using a Loopback Interface for Better Availability An NTP server will accept NTP messages arriving to any of its IPv4 addresses by default.…](https://sms4smile.com/quotes/wendell-odom/ntp-using-a-loopback-interface-for-better-availability-an-ntp-server/) [Wendell Odom](https://sms4smile.com/quotes/author/wendell-odom/) > [“For instance, consider the topology in Figure 33-6, with Router R4 on the right acting as NTP server and the other routers acting as…](https://sms4smile.com/quotes/wendell-odom/for-instance-consider-the-topology-in-figure-33-6-with-router-r4-on/) [Wendell Odom](https://sms4smile.com/quotes/author/wendell-odom/) > [“Implementing NTP Clients, Servers, and Client/Server Mode With NTP, servers supply information about the time of day to clients, and clients react by adjusting…](https://sms4smile.com/quotes/wendell-odom/implementing-ntp-clients-servers-and-client-server-mode-with-ntp/) [Wendell Odom](https://sms4smile.com/quotes/author/wendell-odom/) ## More by Wendell Odom > [“Host B can send ICMP echo reply messages to R1’s 172.16.4.1 IP address (hosts send echo reply messages to the IP address from which…](https://sms4smile.com/quotes/wendell-odom/host-b-can-send-icmp-echo-reply-messages-to-r1-s-172-16-4-1-ip/) [Wendell Odom](https://sms4smile.com/quotes/author/wendell-odom/) > [“NTP Using a Loopback Interface for Better Availability An NTP server will accept NTP messages arriving to any of its IPv4 addresses by default.…](https://sms4smile.com/quotes/wendell-odom/ntp-using-a-loopback-interface-for-better-availability-an-ntp-server/) [Wendell Odom](https://sms4smile.com/quotes/author/wendell-odom/) > [“Storing Log Messages for Later Review With logging to the console and to terminals, an event happens, IOS sends the messages to the console…](https://sms4smile.com/quotes/wendell-odom/storing-log-messages-for-later-review-with-logging-to-the-console-and/) [Wendell Odom](https://sms4smile.com/quotes/author/wendell-odom/) > [“Sending Messages in Real Time to Current Users Cisco IOS running on a device at least tries to allow current users to see log…](https://sms4smile.com/quotes/wendell-odom/sending-messages-in-real-time-to-current-users-cisco-ios-running-on-a/) [Wendell Odom](https://sms4smile.com/quotes/author/wendell-odom/) > [“System Message Logging (Syslog) It is amazing just how helpful Cisco devices try to be to their administrators. When major (and even not-so-major) events…](https://sms4smile.com/quotes/wendell-odom/system-message-logging-syslog-it-is-amazing-just-how-helpful-cisco/) [Wendell Odom](https://sms4smile.com/quotes/author/wendell-odom/) > [“172.16.1.51 and vice versa. You can reasonably assume that the switches learned the MAC addresses of the router and the host, adding those to…](https://sms4smile.com/quotes/wendell-odom/172-16-1-51-and-vice-versa-you-can-reasonably-assume-that-the/) [Wendell Odom](https://sms4smile.com/quotes/author/wendell-odom/) > [“Configuring and Verifying System Logging With the information in Table 33-2, configuring syslog in a Cisco IOS router or switch should be relatively straightforward.…](https://sms4smile.com/quotes/wendell-odom/configuring-and-verifying-system-logging-with-the-information-in/) [Wendell Odom](https://sms4smile.com/quotes/author/wendell-odom/) > [“sending of log messages to all logged users. However, that default configuration is not enough to allow the user to see the log messages.…](https://sms4smile.com/quotes/wendell-odom/sending-of-log-messages-to-all-logged-users-however-that-default/) [Wendell Odom](https://sms4smile.com/quotes/author/wendell-odom/) > [“First, note that the example configures the same message level at the console and for terminal monitoring (level 7, or debug), and the same…](https://sms4smile.com/quotes/wendell-odom/first-note-that-the-example-configures-the-same-message-level-at-the/) [Wendell Odom](https://sms4smile.com/quotes/author/wendell-odom/) > [“First, to understand why the standard and extended ping results have different effects, consider first the standard ping 172.16.1.51 command on R1, as shown…](https://sms4smile.com/quotes/wendell-odom/first-to-understand-why-the-standard-and-extended-ping-results-have/) [Wendell Odom](https://sms4smile.com/quotes/author/wendell-odom/) > [“root cause of the problem may be happening, further isolating the problem. This section begins with a brief explanation of how ping works. It…](https://sms4smile.com/quotes/wendell-odom/root-cause-of-the-problem-may-be-happening-further-isolating-the/) [Wendell Odom](https://sms4smile.com/quotes/author/wendell-odom/) > [“For instance, consider the topology in Figure 33-6, with Router R4 on the right acting as NTP server and the other routers acting as…](https://sms4smile.com/quotes/wendell-odom/for-instance-consider-the-topology-in-figure-33-6-with-router-r4-on/) [Wendell Odom](https://sms4smile.com/quotes/author/wendell-odom/) > [“If the ping works, it confirms the following, which rules out some potential issues: The host with address 172.16.1.51 replied. The LAN can pass…](https://sms4smile.com/quotes/wendell-odom/if-the-ping-works-it-confirms-the-following-which-rules-out-some/) [Wendell Odom](https://sms4smile.com/quotes/author/wendell-odom/) > [“Log Message Format IOS defines the format of log messages. The message begins with some data fields about the message, followed”](https://sms4smile.com/quotes/wendell-odom/log-message-format-ios-defines-the-format-of-log-messages-the-message/) [Wendell Odom](https://sms4smile.com/quotes/author/wendell-odom/) > [“First, take a moment to review the output of the first IOS ping command. By default, the Cisco IOS ping command sends five echo…](https://sms4smile.com/quotes/wendell-odom/first-take-a-moment-to-review-the-output-of-the-first-ios-ping/) [Wendell Odom](https://sms4smile.com/quotes/author/wendell-odom/) [Explore all 32 Wendell Odom quotes ](https://sms4smile.com/quotes/author/wendell-odom/) ## More Ntp Server quotes > [“NTP Using a Loopback Interface for Better Availability An NTP server will accept NTP messages arriving to any of its IPv4 addresses by default.…](https://sms4smile.com/quotes/wendell-odom/ntp-using-a-loopback-interface-for-better-availability-an-ntp-server/) [Wendell Odom](https://sms4smile.com/quotes/author/wendell-odom/) > [“For instance, consider the topology in Figure 33-6, with Router R4 on the right acting as NTP server and the other routers acting as…](https://sms4smile.com/quotes/wendell-odom/for-instance-consider-the-topology-in-figure-33-6-with-router-r4-on/) [Wendell Odom](https://sms4smile.com/quotes/author/wendell-odom/) > [“Implementing NTP Clients, Servers, and Client/Server Mode With NTP, servers supply information about the time of day to clients, and clients react by adjusting…](https://sms4smile.com/quotes/wendell-odom/implementing-ntp-clients-servers-and-client-server-mode-with-ntp/) [Wendell Odom](https://sms4smile.com/quotes/author/wendell-odom/) Browse all 4 Ntp Server quotes ```json { "@context": "https://schema.org", "@graph": [ { "@type": "Quotation", "text": "“The configuration in Example 33-8 works, but in many cases, routers might have multiple ntp server commands configured for redundancy. The goal is to have at least one usable clock source (servers per multiple ntp server commands, or internal clock as per the ntp master command). The router then chooses the best NTP clock source based on the stratum level. The stratum level defines the quality of the clock source; the lower the stratum, the better the source.”", "creator": { "@type": "Person", "name": "Wendell Odom" }, "isPartOf": { "@id": "https://sms4smile.com/quotes/#website" }, "url": "https://sms4smile.com/quotes/wendell-odom/the-configuration-in-example-33-8-works-but-in-many-cases-routers/", "about": { "@type": "Thing", "name": "Ntp Server" }, "@id": "https://sms4smile.com/quotes/wendell-odom/the-configuration-in-example-33-8-works-but-in-many-cases-routers/#quotation", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/9f4/wendell-odom-19707_ntp-server_the-configuration-in-example-33-8-works_2800212.jpg", "contentUrl": "https://sms4smile.com/quotes/i/9f4/wendell-odom-19707_ntp-server_the-configuration-in-example-33-8-works_2800212.jpg", "url": "https://sms4smile.com/quotes/i/9f4/wendell-odom-19707_ntp-server_the-configuration-in-example-33-8-works_2800212.jpg", "width": 1080, "height": 1080, "caption": "“The configuration in Example 33-8 works, but in many cases, routers might have multiple ntp server commands…” — Wendell Odom", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } }, { "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://sms4smile.com/" }, { "@type": "ListItem", "position": 2, "name": "Quotes", "item": "https://sms4smile.com/quotes/" }, { "@type": "ListItem", "position": 3, "name": "Wendell Odom", "item": "https://sms4smile.com/quotes/author/wendell-odom/" }, { "@type": "ListItem", "position": 4, "name": "“The configuration in Example 33-8 works,...", "item": "https://sms4smile.com/quotes/wendell-odom/the-configuration-in-example-33-8-works-but-in-many-cases-routers/" } ], "@id": "https://sms4smile.com/quotes/wendell-odom/the-configuration-in-example-33-8-works-but-in-many-cases-routers/#breadcrumb" }, { "@type": "WebSite", "@id": "https://sms4smile.com/quotes/#website", "name": "SMS4Smile Quotes", "url": "https://sms4smile.com/quotes/", "publisher": { "@id": "https://sms4smile.com/quotes/#organization" } }, { "@type": "Organization", "@id": "https://sms4smile.com/quotes/#organization", "name": "SMS4Smile Quotes", "url": "https://sms4smile.com/quotes/", "logo": { "@type": "ImageObject", "url": "https://sms4smile.com/quotes/wp-content/themes/sq/assets/icons/icon-512.png", "width": 512, "height": 512 } } ] } ```