Specifying Destination MAC Address for Packet Trace
Question
A Cisco FTD device is running in transparent firewall mode with a VTEP bridge group member ingress interface.
What must be considered by an engineer tasked with specifying a destination MAC address for a packet trace?
Answers
Explanations
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A. B. C. D.C.
https://www.cisco.com/c/en/us/td/docs/security/firepower/620/configuration/guide/fpmc-config-guide-v62/troubleshooting_the_system.htmlIn a Cisco FTD device running in transparent firewall mode with a VTEP (Virtual Tunnel End Point) bridge group member ingress interface, specifying a destination MAC address for a packet trace requires careful consideration.
First, it is important to understand that in transparent firewall mode, the firewall operates at Layer 2 of the OSI model and does not modify the IP addresses of packets passing through it. The VTEP bridge group member ingress interface is a network interface that is used to connect the firewall to a VXLAN (Virtual Extensible LAN) network, which is a Layer 2 overlay network that can span multiple physical networks.
When specifying a destination MAC address for a packet trace, the engineer must consider the fact that the packet trace will capture the Layer 2 header of the packet, including the source and destination MAC addresses. In order to accurately capture the packet, the engineer must specify the correct destination MAC address.
Option A, "The output format option for the packet logs is unavailable," is not relevant to the task of specifying a destination MAC address for a packet trace.
Option B, "Only the UDP packet type is supported," is also not relevant to the task of specifying a destination MAC address for a packet trace.
Option C, "The destination MAC address is optional if a VLAN ID value is entered," is incorrect. The VLAN ID is used to identify the VLAN to which the packet belongs, but it does not replace the need to specify the correct destination MAC address.
Option D, "The VLAN ID and destination MAC address are optional," is also incorrect. Both the VLAN ID and the destination MAC address are required to accurately capture the packet in a packet trace.
In summary, when specifying a destination MAC address for a packet trace on a Cisco FTD device running in transparent firewall mode with a VTEP bridge group member ingress interface, the engineer must ensure that the correct destination MAC address is specified along with the VLAN ID.
