Chapter 3 Review

Spent my afternoon in the lab today going over Chapter 3: Switch Port Configuration.

Todays key topics: (As noted by the book)

Characteristics of Ethernet Switching

Ethernet Autonegotiation

Difference of Ethernet Types

10-Gigabit Ethernet

Interface Selection for Configuration

Configure Port Speed

Configure Port Duplex Mode

Configure Port error Detection

Verify Port State

Verify Port Speed and Duplex Mode

Vocabulary:

CSMA/CD - Carrier Sense Multiple Access/Collision Detection

Duplex Mode - The Ethernet mode that governs how a device can transmit over a connection - half-duplix mode forces only one device to transmit at a time, as all devices share the same media; full-duplix mode is used when only two devices share the media, such that both devices can transmit simultaneously.

Autonegotiation - A mechanism used by a device and a switch port to automatically negotiate the link speed and duplex mode

Duplex Mismatch - A condition where the devices on each end of a link use conflicting duplex modes.

IEEE 802.3 - The standard upon which all generations of Ethernet (Ethernet, Fast Ethernet, Gigabit Ethernet, 10 Gigabit Ethernet) are based.

Key Commands:

interface type module/number - Select a port

interface range type module/number [, type modulenumber ...] - Select Multiple Ports

interface range type module/first-number - last-number - Select Multiple Ports

define interface-range macro-name type modulenumber [, type modulenumber ...] [type module/first-number - last-number] [...] - Define an Interface Macro

interface range macro macro-name - Select interfaces in Macro

description description-string - Assign a description to an interface

speed {10 | 100 | 1000 | auto} - Set port speed

duplex {auto | full | half} - Set port duplex mode

errdisable detect cause [all | cause-name] - Detect port error conditions

errdisable recovery cause [all | cause-name] - Automatically recover from errdisable

errdisable recovery interval seconds - Automatically recover from errdisable

shutdown - Common...really

no shutdown - Common...really

He adds shut and no shut to manually recover from errdisable. But...yeah.

And I'll add this one because I think it's important...

show interface status errdisable - Shows errdisabled interfaces and reason for errdisable.

I'm not exactly sure why the last one was left off of the book list, but oh well. I added it, so there.

In all this chapter was good but mostly review. It still solidifies even more the things you learn as a network engineer. Building blocks for the later chapters.

Not really anything new or cool to post from this chapter. On to the next!