When you discover operational anomalies, you can validate that the devices, hosts, network protocols and services are operating as expected. You can also compare the current operation with past operation. With NetQ, you can view the overall health of your network at a glance and then delve deeper for periodic checks or as conditions arise that require attention. When issues are present, NetQ makes it easy to identify and resolve them. You can also see when changes have occurred to the network, devices, and interfaces by viewing their operation, configuration, and status at an earlier point in time.
NetQ enables you to validate the:
- Overall health of the network
- Operation of the network protocols and services running in your network (either on demand or on a scheduled basis)
- Configuration of physical layer protocols and services
Validation support is available in the NetQ UI and the NetQ CLI as shown here.
|Cumulus Linux version
Validation with the NetQ UI
The NetQ UI uses the following cards to create validations and view results for these protocols and services:
- Network Health
- Validation Request
- On-demand and Scheduled Validation Results
For a general understanding of how well your network is operating, the Network Health card workflow is the best place to start as it contains the highest-level view and performance roll-ups. Refer to the NetQ UI Card Reference for details about the components on these cards.
Validation with the NetQ CLI
The NetQ CLI uses the
netq check commands to validate the various elements of your network fabric, looking for inconsistencies in configuration across your fabric, connectivity faults, missing configuration, and so forth, and then display the results for your assessment. You can run them from any node in the network.
The NetQ CLI has many other validation features and considerations.
Set a Time Period
You can run validations for a time in the past and output the results in JSON format if desired. The
around option enables users to view the network state at an earlier time. The
around option value requires an integer plus a unit of measure (UOM), with no space between them. The following are valid UOMs:
If you want to go back in time by months or years, use the equivalent number of days.
Improve Output Readability
You can the readability of the validation outputs using color. Green output indicates successful results and red output indicates results with failures, warnings, and errors. Use the
netq config add color command to enable the use of color.
View Default Validation Tests
To view the list of tests run for a given protocol or service by default, use either
netq show unit-tests <protocol/service> or perform a tab completion on
netq check <protocol/service> [include|exclude]. Refer to Validation Checks for a description of the individual tests.
Select the Tests to Run
You can include or exclude one or more of the various tests performed during the validation. Each test is assigned a number, which is used to identify which tests to run. Refer to Validation Checks for a description of the individual tests. By default, all tests are run. The
<protocol-number-range-list> value is used with the
exclude options to indicate which tests to include. It is a number list separated by commas, or a range using a dash, or a combination of these. Do not use spaces after commas. For example:
- include 1,3,5
- include 1-5
- include 1,3-5
- exclude 6,7
- exclude 6-7
- exclude 3,4-7,9
The output indicates whether a given test passed, failed, or was skipped.
Validation Check Result Filtering
You can create filters to suppress false alarms or uninteresting errors and warnings that can be a nuisance in CI workflows. For example, certain configurations permit a singly connected MLAG bond, which generates a standard error that is not useful.
Filtered errors and warnings related to validation checks do NOT generate notifications and do not get counted in the alarm and info event totals. They do get counted as part of suppressed notifications instead.
You define these filters in the
/etc/netq/check-filter.yml file. You can create a rule for individual check commands or you can create a global rule that applies to all tests run by the check command. Additionally, you can create a rule specific to a particular test run by the check command.
Each rule must contain at least one
match criteria and an
action response. The only action currently available is filter. The match can comprise multiple criteria, one per line, creating a logical AND. You can match against any column in the validation check output. The match criteria values must match the case and spacing of the column names in the corresponding
netq check output and are parsed as regular expressions.
This example shows a global rule for the BGP checks that suppresses any events generated by the DataVrf virtual route forwarding interface coming from swp3 or swp7.. It also shows a test-specific rule to filter all Address Families events from devices with hostnames starting with exit-1 or firewall.
Peer Name: (swp3|swp7.)
Create Filters for Provisioning Exceptions
You can configure filters to change validation errors to warnings that would normally occur due to the default expectations of the
netq check commands. This applies to all protocols and services, except for Agents. For example, if you provision BGP with configurations where a BGP peer is not expected or desired, then errors that a BGP peer is missing occur. By creating a filter, you can remove the error in favor of a warning.
To create a validation filter:
Navigate to the
Create or open the
check_filter.ymlfile using your text editor of choice.
This file contains the syntax to follow to create one or more rules for one or more protocols or services. Create your own rules, and/or edit and un-comment any example rules you would like to use.
# Netq check result filter rule definition file. This is for filtering # results based on regex match on one or more columns of each test result. # Currently, only action 'filter' is supported. Each test can have one or # more rules, and each rule can match on one or more columns. In addition, # rules can also be optionally defined under the 'global' section and will # apply to all tests of a check. # # syntax: # # <check name>: # tests: # <test name, as shown in test list when using the include/exclude and tab>: # - rule: # match: # <column name>: regex # <more columns and regex.., result is AND> # action: # filter # - <more rules..> # global: # - rule: # . . . # - rule: # . . . # # <another check name>: # . . . # # e.g. # # bgp: # tests: # Address Families: # - rule: # match: # Hostname: (^exit*|^firewall) # VRF: DataVrf1080 # Reason: AFI/SAFI evpn not activated on peer # action: # filter # - rule: # match: # Hostname: exit-2 # Reason: SAFI evpn not activated on peer # action: # filter # Router ID: # - rule: # match: # Hostname: exit-2 # action: # filter # # evpn: # tests: # EVPN Type 2: # - rule: # match: # Hostname: exit-1 # action: # filter #
Use Validation Commands in Scripts
If you are running scripts based on the older version of the
netq check commands and want to stay with the old output, edit the netq.yml file to include
old-check: true in the
netq-cli section of the file. For example:
netq config restart cli to apply the change.
If you update your scripts to work with the new version of the commands, just change the
old-check value to false or remove it. Then restart the CLI.
netq check mlag in place of
netq check clag from NetQ 2.4 onward.
netq check clag remains available for automation scripts, but you should begin migrating to
netq check mlag to maintain compatibility with future NetQ releases.