AppGigabitEthernet interface is used as data port for a container on a Cisco Catalyst 9000 Series Switch. Which two interface configuration options should be used? (Choose two.)
Folks...The only 2 configuration options for an AppGigabitEthernet data port are: 'TRUNK' or 'VLAN' (comparable to 'trunk' or 'access' ports). The management interface is used by the switch to "manage" the docker container (eg. starting and operating a shell). This interface isn't running as a 'service interface' (such as "eth0") inside the docker container, it's bound to the whole container. You can see the 2 available configurations on page 84 of the original CiscoLive presentation of docker container configuration on a catalyst switch:
https://www.ciscolive.com/c/dam/r/ciscolive/us/docs/2019/pdf/BRKCRS-2004.pdf
In summary....assuming JCGO is right that the real exam actually says "VLAN" and not "SPAN", the answers are A & C. If it actually does say "SPAN" then the question is broken because "SPAN" is nowhere in the documentation and there are no other viable choices.
It should be Trunk or VLAN interface
The AppGigabitEthernet interface can be configured as a trunk or VLAN specific interface. For a trunk interface, it is extended to work as a Layer 2 trunk port, and all traffic received by the port is available to the application. For a VLAN interface, the application is connected to a specific VLAN network by specifying the VLAN ID number.
https://www.cisco.com/c/en/us/products/collateral/switches/catalyst-9300-series-switches/white-paper-c11-742415.html
A & E:
A. Trunk Interface: You would typically configure the GigabitEthernet interface as a trunk interface when connecting to a container. This allows you to carry multiple VLANs over the same interface, which can be useful for containerized applications that require access to multiple VLANs.
E. Subinterface: Subinterfaces can be used when you need to divide a physical interface into multiple logical interfaces. This can be helpful for isolating traffic or providing connectivity to multiple containers with different network configurations
A and C seem more accurate since SPAN Source Ports can be access or trunk ports.
Definition:
Containers can connect to AppGigabitEthernet in two modes: VLAN (where a single untagged VLAN is mapped to a container’s interface) and Trunk (where traffic for all the allowed VLANs is sent as Native or VLAN-tagged frames)
Also, please see the white paper >
https://www.cisco.com/c/en/us/products/collateral/switches/catalyst-9300-series-switches/white-paper-c87-742415.html
Although, there are two types of connectivity which are via Front Panel (Regular) L2 interfaces using trunk or VLAN (untagged vlan) or via L3 Routed interface using NAT and VirtualPortGroup. I think the question is asking only about the AppGigabitEthernet and this could be only configured as L2 interfaces in two modes (VLAN and Trunk) according to the WhitePaper and Cisco DEVCOR Study Guide.
But there are three ways to connect containers to the external networks: via the Management interface, via L2 data ports, and via L3 routed interface. So, the answer could be management interface and trunk ports (L2 data ports), but 'source span port; could be an access port as well.
According to the Cisco DEVCOR Study Guide page 155, the answer is A & D:
"There are three ways to connect containers to the external networks: via the Management interface, via L2 data ports, and via L3 routed interface."
There's even nice drawings and configuration examples.
I'll go with A & D.
If you read further, you see “Containers can connect to AppGigabitEthernet in two modes: VLAN (where a single untagged VLAN is mapped to a container’s interface) and Trunk (where traffic for all the allowed VLANs is sent as Native or VLAN-tagged frames)”
So, assuming JCGO is correct and SPAN should be VLAN, then A&C are correct.
It's A and B. A bridged virtual interface means it's layer 2 and VLANs live at layer 2. Since it's referring to a data port, it would mean you need a bridged virtual interface for a single VLAN and a trunk interface for an interface carrying multiple VLANS. This is a networking question when you think about it.
I honestly will go with doubts on this one. The question is not "options that we could use" is "options we should use". If it was could and C is really VLAN no doubt I'll go with A and C. But looking at the PDF mentioned below we can have a container with two nics, data (trunk) and management...
A and C, where hopefully "C" is "VLAN port" as JCGO says..
The AppGigabitEthernet interface can be configured as a trunk or VLAN specific interface.
https://www.cisco.com/c/dam/en/us/products/collateral/switches/catalyst-9300-series-switches/white-paper-c87-742415.pdf
This is also from the same doc which implies the management port can't be used:
"A new AppGigabitEthernet interface was introduced [...]. It is an internal hardware data
port that is hardware-switched to the front panel data ports." so A and C would be right I believe.
Management interface would be a viable option if the question would not be about the data port: "AppGigabitEthernet interface is used as DATA port... "
---
app-vnic management guest-interface network-interface
Example:
Device(config-app-hosting)# app-vnic management guest-interface 1
---
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/prog/configuration/1612/b_1612_programmability_cg/application_hosting.html
A is correct for sure. D is not right. It's about another interface on front panel.
From the configuration guide, did not see an option to configure AppGiga subinterfaces. B does not make sense since virtual interfaces are the concepts in the container. Completely don't know what "SPAN port" is here.
You're all wrong. It's A and D. Look at the diagram on Cisco's website that lists Management Interface, front-panel VLAN and front-panel Trunk. Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/prog/configuration/1612/b_1612_programmability_cg/application_hosting.html
Read this carefully,
The “AppGigabitEthernet” interface is only available on the Cisco Catalyst 9300 series, Catalyst 9404 and Catalyst
9407 switches. Catalyst 9500, and 9600 series switches do not support AppGigabitEthernet interface. The
connectivity for applications hosted on these models is achieved through management interface
"The AppGigabitEthernet interface can be configured as
a trunk or VLAN specific interface. For a trunk interface, it is extended to work as a Layer 2 trunk port, and all traffic
received by the port is available to the application. For a VLAN interface, the application is connected to a specific
VLAN network by specifying the VLAN ID number"
That is a direct quote from RexChen above - so Trunk or VLAN is what I'd go with if the test says VLAN. It does not mention a BVI but management interface in that document...
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