In my conversations with clients and companions, there are two subjects which are completely different however considerably associated: compliance and system configuration administration.  In my newest weblog, “Compliant or not? Cisco DNA Heart will assist you determine this out”, we mentioned compliance capabilities in Cisco DNA Heart 2.3.3.  On this weblog, I’ll deal with system configuration administration.

Let me begin by saying that DNA Heart all the time has the most recent system configuration in its inside databases. This has all the time been the case. The configuration of a tool is first collected and saved when the system is added to the stock, it’s then up to date by periodic triggers in addition to event-based triggers. Occasion-based triggers occur when there’s a change within the configuration. DNA Heart makes use of these up-to-date configurations for all its capabilities together with, however not restricted to, assurance, system alternative, and compliance. Community directors can even leverage these configurations so, on this weblog, we’ll discover other ways to entry them.

Visualize Configuration in Stock

For sure system sorts, like switches, DNA Heart has the choice to indicate and export the complete system configuration. This enables the community administrator to have fast visibility into the configuration. For safety causes, delicate information is masked which signifies that we will’t straight use this system config to revive a tool.

Configuration Visualization in Inventory
Determine 1: Configuration Visualization in Stock: delicate information is masked

Export the system configuration

Configuration archive is the DNA Heart characteristic that enables community directors to export uncooked configurations to an exterior server. Uncooked configurations are helpful to revive a tool for instance.

Configuration Archive
Determine 2: Configuration Archive: exporting uncooked configurations to an exterior server

System configuration backup will be scheduled with the specified recurrence and the configurations are despatched to an exterior server. For every configuration backup, DNA Heart creates a password-protected zip file. This zip file incorporates one listing per system and every listing incorporates three information: running-config, startup-config, and VLAN database.

Password-protected zip file
Determine 3: Password-protected zip file


Running, Startup configs and VLAN DB
Determine 4: One listing per system containing operating config, startup configs and VLAN DB

APIs to retrieve system configuration

One other method to entry the clear textual content system configurations is through APIs. The API accessible in Cisco DNA Heart permits to retrieve uncooked startup, operating configs, and VLAN DB within the type of a zipper file in the same approach because the configuration archive functionality.

API particulars:

POST /network-device-archive/cleartext

Visualize Configuration Drifts

Arguably, I’m leaving essentially the most fascinating functionality for final!

In the beginning of the weblog, we talked about that DNA Heart shops the system configuration and updates the configurations periodically and upon adjustments. Each time there’s a change within the configuration, DNA Heart will retailer and timestamp this new configuration for a most of fifty. We name these configurations config drifts. Furthermore, DNA Heart can present variations between these saved configurations to assist the community administrator establish any adjustments. For out-of-band adjustments, Config Drift device will even present the username of the person who made the change.

Within the instance under, we’re evaluating two configurations taken on September 2nd, 2022, one at 1:56pm and the opposite at 2:57pm. We are able to see within the latter, {that a} “description” command was faraway from “interface GigabitEthernet 1/0/10”. As soon as we establish these adjustments within the operating configuration, the community administrator can take particular actions to remediate the problem. For instance, the system will be re-provisioned.

Config Drift
Determine 5: Config Drift

We are able to additionally establish and label a particular configuration that we deem “normal”. That approach, it is going to be simpler to match the present operating configuration with the chosen labeled configuration.

Within the instance under, we’ll first choose the popular configuration and title it with the label of our alternative, on this case, “TBRANCH-Std-Config“:

Label Config
Determine 6: Label Config

As soon as we label our normal configuration, we will then examine it to the present configuration. On this instance, the present operating configuration is recognized as “September 2nd at 3:10pm”. On this case, each operating configuration and normal configurations match.

Comparing running-config to labeled config
Determine 7: Evaluating running-config to labeled config

Have you ever tried these capabilities?

Are there another subjects you’d wish to see in these blogs?

Let me know within the feedback under.



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