Answers to Chapter 8 Review Questions

Answers to Chapter 8 Review Questions

1:

What happens in a traffic loading situation for EtherChannel when two servers pass files between each other?

A:

All of the traffic between the servers crosses the same segment. This happens because the servers use the same MAC address for all of the frames. The ECB performs an X-OR on the MAC addresses and comes up with the same result every time.

2:

If you have access to equipment, attempt to configure a two-segment EtherChannel where one end is set to transport only VLANs 1 10 and the other end of the segment is set to transport all VLANs. What gets established?

A:

Nothing. Both ends of an EtherChannel must be configured to pass the same set of VLANs on all interfaces.

3:

In Figure 8-13, the configuration shows an 802.1Q encapsulation for VLAN 200 on a router. How would you add VLAN 300 to the trunk?

A:

Add the statement encapsulation dot1q 300 to another subinterface.

4:

Configure a Catalyst trunk to transport VLAN 200 and VLAN 300 with 802.1Q. Repeat the exercise with ISL.

A:

Typical configuration statements are as follows:

 set trunk 1/1 on dot1q clear trunk 1/1 201-299 clear trunk 1/1 301-1005 clear trunk 1/1 2-199 

This method is a little awkward in that it allows all VLANs and then removes the disallowed VLANs.

To do the ISL trunk, you could follow the same process, except that the first command would say set trunk 1/1 on isl.