Question 161 of 290 from exam 400-151: CCIE Data Center Written Exam

AB.

Sure, I'd be happy to explain!

First, let's define some key terms:

• SPAN (Switched Port Analyzer): a feature that allows you to monitor network traffic by copying and forwarding network packets from one or more source ports to a destination port for analysis.
• Nexus 1000v: a virtual switch that can be deployed on VMware vSphere hypervisors to provide advanced network features and policy-based virtual machine connectivity.

Now, let's look at each configuration option and determine if it is a valid span configuration for a Cisco Nexus 1000v switch.

Option A:

scssCopy code
n1000v(config)#monitor session 3 n1000v(config-monitor)#source interface ethernet 2/1-3 n1000v(config-monitor)#source vlan 3, 6-8 n1000v(config-monitor)#filter vlan 3-5, 7 n1000v(config-monitor)#destination interface ethernet 2/5 

This configuration sets up a monitor session with session ID 3. The source interface is set to include ethernet ports 2/1-3, and the source VLANs are set to include VLANs 3, 6-8. The filter is set to include VLANs 3-5, 7. The destination interface is set to ethernet port 2/5. This configuration is a valid span configuration for a Cisco Nexus 1000v switch.

Option B:

scssCopy code
n1000v(config)#monitor session 3 n1000v(config-monitor)#source interface ethernet 3/1 n1000v(config-monitor)#source vlan 3, 6-8 n1000v(config-monitor)#filter vlan 3-5, 7 n1000v(config-monitor)#destination interface ethernet 3/2 

This configuration sets up a monitor session with session ID 3. The source interface is set to include ethernet port 3/1, and the source VLANs are set to include VLANs 3, 6-8. The filter is set to include VLANs 3-5, 7. The destination interface is set to ethernet port 3/2. This configuration is also a valid span configuration for a Cisco Nexus 1000v switch.

Option C:

scssCopy code
n1000v(config)#monitor session 3 n1000v(config-monitor)#source interface ethernet 3/1-3 n1000v(config-monitor)#source vlan 3, 6-8 n1000v(config-monitor)#filter vlan 3-5, 7 n1000v(config-monitor)#destination interface ethernet 2/5 

This configuration sets up a monitor session with session ID 3. The source interface is set to include ethernet ports 3/1-3, and the source VLANs are set to include VLANs 3, 6-8. The filter is set to include VLANs 3-5, 7. However, the destination interface is set to ethernet port 2/5, which is not one of the source interfaces. Therefore, this configuration is not a valid span configuration for a Cisco Nexus 1000v switch.

Option D:

scssCopy code
n1000v(config)#monitor session 3 n1000v(config-monitor)#source interface ethernet 2/1-4 n1000v(config-monitor)#source vlan 3, 6-8 n1000v(config-monitor)#filter vlan 3-5, 7 n1000v(config-monitor)#destination interface ethernet 2/2 

This configuration sets up a monitor session with session ID 3. The source interface is set to include ethernet ports