Delay Metric is the measure of the time it takes a bit to be transmitted to an adjacent neighbor. The delay metric (DLY) is a constant value based on the type of link to which the interface is connected. The value is expressed in microseconds, the one-millionth of a second. In the EIGRP metric calculation, the delay value is used in 10’s of microseconds
The delay value is just like the bandwidth value. We can change the default value. Router cannot measure delay dynamically. We can calculate the Delay value, by dividing the DLY in the show interface command by 10. Important the when determining the EIGRP metric, the delay is the cumulative (sum) of all interface delays along the path from the source to destination. The default delay values for different interfaces are following:
Ethernet – 1000
Fast Ethernet – 100
Gigabit Ethernet – 10
16M token Ring – 630
FDDI – 100
T1 Line – 20,000
56 kb/s – 20,000
You can see that the default value is 20,000 microseconds for serial interfaces and 10 microseconds for Gigabit Ethernet interfaces. We can use the show interfaces command to verify the delay value on an interface. Figure 1 illustrates the delay time in R1 interface.
NetworkUstad's lead networking architect with CCIE certification. Specializes in CCNA exam preparation and enterprise network design. Authored 2,800+ technical guides on Cisco systems, BGP routing, and network security protocols since 2018. Picture this: I'm not just someone who writes about tech; I'm a certified expert in the field. I proudly hold the titles of Cisco Certified Network Professional (CCNP) and Cisco Certified Network Associate (CCNA). So, when I talk about networking, I'm not just whistling in the dark; I know my stuff! My website is like a treasure trove of knowledge. You'll find a plethora of articles and tutorials covering a wide range of topics related to networking and cybersecurity. It's not just a website; it's a learning hub for anyone who's eager to dive into the world of bits, bytes, and secure connections. And here's a fun fact: I'm not a lone wolf in this journey. I'm a proud member and Editor of Team NetworkUstad. Together, we're on a mission to empower people with the knowledge they need to navigate the digital landscape safely and effectively. So, if you're ready to embark on a tech-savvy adventure, stick around with me, Asad Ijaz Khattak. We're going to unravel the mysteries of technology, one article at a time!"
