BDL 2.3 Buzzwords

Question 1

This switch is capable of routing without the need of a router. Out of the box, this type of switch is L2.

Answer 1

MLS - multi layer switch, L3 switch.

Question 2

These represent your default gateways for each VLAN in the network configured in a L3 switch or mls.

Answer 2

Interface VLAN

Question 3

Characteristic of L3 devices, also known as the management IP.

Answer 3

Interface loopback

Question 4

It is the configuration of routing a L3 device for traffic from different VLANs to be forwarded through the network.

Answer 4

inter-vlan routing

Question 5

a logical L3 interface created to house VLAN traffic information. Characteristic of switches only, you configure protocols like the default gateways, HSRP, etc. of the network’s different broadcast domains.

Answer 5

SVI or switch virtual interface

Question 6

run under configuration mode to show you the VLANS that are created in the switch.

Answer 6

(config)#do show vlan

Question 7

This configuration command needs to be run under global configuration mode. Where xxx is the VLAN number you are trying to create.

Answer 7

(config)#vlan xxx

Question 8

Command run under configuration mode to configure loopback and to create it if it does not exist in the switch already. For redundancy purposes, you can always have more than one loopback.

Answer 8

(config)#int loop0

Question 9

Command run under configuration mode to configure a VLAN interface, where xxx is the VLAN you are trying to associate this interface with.

Answer 9

(config)#int Vlanxxx

Question 10

used to verify if the interfaces were configured correctly.

Answer 10

(config)#do show ip interface brief/ do sh ip int br

Question 11

to show the overall configurations in your L3 switch.

Answer 11

(config)#do show run

Question 12

configuration to convert a dynamic desirable port, to an access port to connect a host.

Answer 12

(config)#switchport mode access

Question 13

configuration inside an access port to tag it with a VLAN.

Answer 13

(config)#switchport access vlan xx

Question 14

configuration inside an access port after being tagged with a VLAN, see Switchport access VLANxx; this helps prevent loops and should only be configured in an access port.

Answer 14

(config)#spanning-tree portfast

Question 15

configuration in a port to make sure that the interface is up and ready to receive traffic. Default configuration in most switch devices for ports is ‘shut’ or down/down.

Answer 15

(config)#no shut

Question 16

command under configuration mode, to verify that ports f0/x are assigned to the correct VLANS.

Answer 16

(config)#do show vlan, do sh vlan

Question 17

to verify if routing is turned on in L3 switch and see the routing table; if not turned on, you will see the following message:

‘ICMP redirect cache is empty’

If it is turned on you will see the routing table with codes a message of ‘Gateway of last resort is not set’ and the directly connected devices via the local interfaces.

Answer 17

show ip route

Question 18

configuration under config t mode to turn on routing capabilities in a L3 switch.

Answer 18

(config)#ip routing

Question 19

this show command will allow you to see any log messages that your device has captured, like checking if certain interfaces went down.

Answer 19

Show logging

Question 20

banner message of the day, configuration command under config t, will allow you to display a message when you are first trying to login to a device. This is typically used to display a permanent message.

Answer 20

(config)#1Banner motd