nerdexam
Cisco

300-440 · Question #81

Drag and Drop Question Drag and drop the commands from the bottom onto the blanks where the code is missing in the configuration to complete the Cloud onRamp for SaaS over SIG tunnels and enable NBAR

The correct answer is sla-class cisco_class latency 10; sla-class cisco_class preferred-color biz-internet; app-route-policy cisco_route_policy; ip sdwan route vrf 1 192.168.0.1 service sig; ip nbar protocol-discovery; ip nbar protocol-discovery; ip nbar protocol-discovery. Cloud onRamp for SaaS over SIG - Drag-and-Drop Explained Overview of What's Being Configured This configuration builds three logical layers: 1. SLA policy - defines path quality requirements 2. Routing directives - steers traffic to the SIG tunnel 3. NBAR discovery - enables appl

SD-WAN Cloud Connectivity

Question

Drag and Drop Question Drag and drop the commands from the bottom onto the blanks where the code is missing in the configuration to complete the Cloud onRamp for SaaS over SIG tunnels and enable NBAR protocol discovery. Some commands may be used more than once. Not all commands are used. Answer:

Exhibit

300-440 question #81 exhibit

Answer Area

Drag items

sla-class cisco_class latency 10sla-class cisco_class preferred-color biz-internetapp-route-policy cisco_route_policyip sdwan route vrf 1 192.168.0.1 service sigvrf definition 1 rd 1:1 192.168.0.1 service sigip nbar protocol-discovery

Correct arrangement

  • sla-class cisco_class latency 10
  • sla-class cisco_class preferred-color biz-internet
  • app-route-policy cisco_route_policy
  • ip sdwan route vrf 1 192.168.0.1 service sig
  • ip nbar protocol-discovery
  • ip nbar protocol-discovery
  • ip nbar protocol-discovery

Explanation

Cloud onRamp for SaaS over SIG - Drag-and-Drop Explained

Overview of What's Being Configured

This configuration builds three logical layers:

  1. SLA policy - defines path quality requirements
  2. Routing directives - steers traffic to the SIG tunnel
  3. NBAR discovery - enables application recognition on interfaces

The 7 blanks fit into a partial config template. Here's the full picture:


Item-by-Item Breakdown

Blank 1: sla-class cisco_class latency 10

Why here: This opens the SLA class definition by naming it (cisco_class) and setting a latency threshold of 10 ms. It must come first because the app-route policy in Blank 3 references this class by name - you can't reference what doesn't exist yet.


Blank 2: sla-class cisco_class preferred-color biz-internet

Why here: This is the second attribute of the same SLA class. It tells SD-WAN to prefer the biz-internet transport color when this SLA class is evaluated. It belongs immediately after Blank 1 because it's still part of the same SLA class block - order within the block matters for readability and some platforms require grouped attributes.


Blank 3: app-route-policy cisco_route_policy

Why here: This applies the app-aware routing policy (cisco_route_policy) that ties back to the SLA class defined in Blanks 1–2. It must follow the SLA class definition - the policy engine needs the SLA class to already be declared before it can be bound to a route policy.


Blank 4: ip sdwan route vrf 1 192.168.0.1 service sig

Why here: This injects an SD-WAN static route into VRF 1, pointing 192.168.0.1 out through the SIG (Secure Internet Gateway) service. This is the actual forwarding instruction that redirects SaaS-bound traffic into the SIG tunnel. It goes after the policy configuration because the route leverages the policy context already established.


Blanks 5, 6, 7: ip nbar protocol-discovery (×3)

Why three times: ip nbar protocol-discovery is an interface-level command - it must be applied individually to each interface where you want application recognition. In a typical Cloud onRamp for SaaS deployment, this is enabled on:

  • WAN interface 1 (e.g., biz-internet uplink)
  • WAN interface 2 (e.g., a second uplink)
  • LAN-facing interface (so app traffic is classified as it enters the device)

NBAR is required for Cloud onRamp for SaaS - without it, the router cannot identify SaaS application flows, and the SLA-based path selection has nothing to act on.


Why the Distractor Was Wrong

DistractorWhy Not Used
vrf definition 1 rd 1:1 192.168.0.1 service sigThis is malformed - VRF definition syntax doesn't include destination IPs or service sig. It's a red herring mixing VRF definition syntax with SDWAN route syntax.

Common Mistakes

  • Applying NBAR only once - the most common error. Candidates assume it's a global command; it's per-interface.
  • Putting app-route-policy before the SLA class - the policy must reference an already-defined SLA class.
  • Choosing the VRF distractor - it looks plausible but is syntactically invalid for this context.
  • Thinking preferred-color is optional - without it, SD-WAN won't know which transport to prefer, making the SLA class functionally incomplete for SIG steering.

Topics

#Cloud onRamp for SaaS#SIG tunnels#NBAR#protocol discovery

Community Discussion

No community discussion yet for this question.

Full 300-440 Practice