Foundation Summary
This section lists additional details and facts to round out the coverage of the topics in this chapter. Unlike most of the Cisco Press Exam Certification Guides, this "Foundation Summary" does not repeat information presented in the "Foundation Topics" section of the chapter. Please take the time to read and study the details in the "Foundation Topics" section of the chapter, as well as review items noted with a Key Topic icon.
Table 2-10 lists some of the most popular IOS commands related to the topics in this chapter. (The command syntax was copied from the Catalyst 3550 Multilayer Switch Command Reference, 12.1(20)EA2. Note that some switch platforms may have differences in the command syntax.)
Table 2-10. Catalyst IOS Commands Related to Chapter 2
|
Command |
Description |
|
show mac address-table [aging-time | count | dynamic | static] [address hw-addr] [interface interface-id] [vlan vlan-id] |
Displays the MAC address table; the security option displays information about the restricted or static settings |
|
show interfaces [interface-id | vlan vlan-id] switchport | trunk] |
Displays detailed information about an interface operating as an access port or a trunk |
|
show vlan [brief | id vlan-id | name vlan-name | summary] |
EXEC command that lists information about VLAN |
|
show vlan [vlan] |
Displays VLAN information |
|
show vtp status |
Lists VTP configuration and status information |
|
switchport mode {access | dot1q-tunnel | dynamic {auto | desirable} | trunk} |
Configuration command setting nontrunking (access), trunking, and dynamic trunking (auto and desirable) parameters |
|
switchport nonegotiate |
Interface subcommand that disables DTP messages; interface must be configured as trunk or access port |
|
switchport trunk {allowed vlan vlan-list} | {encapsulation {dot1q | isl | negotiate}} | {native vlan vlan-id} | {pruning vlan vlan-list} |
Interface subcommand used to set parameters used when the port is trunking |
|
switchport access vlan vlan-id |
Interface subcommand that statically configures the interface as a member of that one VLAN |
Table 2-11 lists the commands related to VLAN creation—both the VLAN database mode configuration commands (reached with the vlan database privileged mode command) and the normal configuration mode commands.
Table 2-11. Catalyst 3550 VLAN Database and Configuration Mode Command List
|
VLAN Database |
Configuration |
|
vtp {domain domain-name | password password | pruning | v2-mode | {server | client | transparent}} |
vtp {domain domain-name | file filename | interface name | mode {client | server | transparent} | password password | pruning | version number} |
|
vlan vlan-id [backupcrf {enable | disable}] [mtu mtu-size] [name vlan-name] [parent parent-vlan-id] [state {suspend | active}] |
vlan vlan-id1 |
|
show {current | proposed | difference} |
No equivalent |
|
apply | abort | reset |
No equivalent |
Table 2-12. Cisco IOS PPPoE Client Commands
|
Command |
Description |
|
pppoe enable |
Enables PPPoE operation on an Ethernet interface or subinterface |
|
pppoe-client dial-pool-number number |
Configures the outside Ethernet interface on a router for PPPoE operation and ties it to a dialer interface |
|
debug pppoe [data | errors | events | packets] |
Enables debugging for PPPoE troubleshooting |
Memory Builders
The CCIE Routing and Switching written exam, like all Cisco CCIE written exams, covers a fairly broad set of topics. This section provides some basic tools to help you exercise your memory about some of the broader topics covered in this chapter.
Fill In Key Tables from Memory
Appendix G, "Key Tables for CCIE Study," on the CD in the back of this book contains empty sets of some of the key summary tables in each chapter. Print Appendix G, refer to this chapter's tables in it, and fill in the tables from memory. Refer to Appendix H, "Solutions for Key Tables for CCIE Study," on the CD to check your answers.
Definitions
Next, take a few moments to write down the definitions for the following terms:
- VLAN, broadcast domain, DTP, VTP pruning, 802.1Q, ISL, native VLAN, encapsulation, private VLAN, promiscuous port, community VLAN, isolated VLAN, 802.1Q-in-Q, Layer 2 protocol tunneling, PPPoE, DSL.
Refer to the glossary to check your answers.
Further Reading
The topics in this chapter tend to be covered in slightly more detail in CCNP Switching exam preparation books. For more details on these topics, refer to the Cisco Press CCNP preparation books found at www.ciscopress.com/ccnp.
Cisco LAN Switching, by Kennedy Clark and Kevin Hamilton, is an excellent reference for LAN-related topics in general, and certainly very useful for CCIE written and lab exam preparation.