Refer to the following network diagram:
 
You executed the following commands on the swtA switch:
 
You executed the following commands on the rtrA switch:
 
Which of the following VLANs do(es) NOT participate in inter-VLAN routing through the rtrA router?

A. VLAN 11 only

B. VLAN 22 only

C. VLAN 33 only

D. VLAN 11 and VLAN 22

E. VLAN 22 and VLAN 33

F. VLAN 33 and VLAN 11




 

Suggested Answer: B

VLAN 22 is the only VLAN that does not participate in inter-VLAN routing through the rtrA router. The given network diagram and the commands reflect a router- on-a-stick (RoaS) configuration. In a RoaS configuration, inter-VLAN routing is achieved in two steps.
The first step sets up the switch:
Configure the switch -
Configure the required VLANs -
Configure the switch port connecting to the router interface as a trunk port
Enable dot1q or ISL encapsulation on the trunk port
Configure the switch ports connecting to the VLANs as access ports
Assign the access switch ports to respective VLANs
The second step sets up the router:
Configure the router -
Enable the router interface connected to the trunk switch port
Create separate subinterfaces on the trunk router interface for each VLAN
Enable dot1q or ISL encapsulation on the subinterfaces
Assign IP addresses to each subinterface in the same subnet as the VLAN of which the interface will be a member. Consequently, this address will become the default gateway for each host in that VLAN.
In the scenario, the subinterface created for VLAN 22 is not configured for inter-VLAN routing because the encapsulation command is missing. Without this command, the encapsulation type and the VLAN ID remain
Objective:
Layer 2 Technologies -
Sub-Objective:
Configure and verify trunking -
References:
Home > Support > Configuring InterVLAN Routing > Configuring InterVLAN Routing on an External Cisco Router > Configuring IP InterVLAN Routing on an
External Router -
Home > Support > Configuring InterVLAN Routing > InterVLAN Routing Configuration Examples > InterVLAN Routing with an External Cisco 7505 Router
Example

This question is in 300-115 Implementing Cisco IP Switched Networks (SWITCH) Exam
For getting Cisco Certified Network Professional (CCNP) Routing and Switching Certificate





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