bf_assert.rst

bf_assert

Makes assertions about a Batfish snapshot

Synopsis

• Makes assertions about the contents and/or behavior of a Batfish snapshot.

Requirements

The following software packages must be installed on hosts that execute this module:

• pybatfish

Module-specific Options

The following options may be specified for this module:

parameter	type	required	default	comments
assertions	list	yes		List of assertions to make about the snapshot. See assertions.rst for documentation of supported assertions.
network	str	no	Value in the bf_network fact.	Name of the network to make assertions about.
session	dict	no	Value in the bf_session fact.	Batfish session object required to connect to the Batfish service.
snapshot	str	no	Value in the bf_snapshot fact.	Name of the snapshot to make assertions about.

Examples

:

# Confirm there are no undefined references or incompatible BGP sessions
- bf_assert:
    assertions:
      - type: assert_no_undefined_references
        name: Confirm we have no undefined references
      - type: assert_no_incompatible_bgp_sessions
        name: Confirm we have no incompatible BGP sessions

# Confirm 10.10.10.10 is reachable by traffic entering Gig0/0 of as1border1
- bf_assert:
    assertions:
      - type: assert_all_flows_succeed
        name: confirm host is reachable for traffic received on GigEth0/0
        parameters:
          startLocation: '@enter(as1border1[GigabitEthernet0/0])'
          headers:
            dstIps: '10.10.10.10'

# Confirm a filter denies some specific traffic
- bf_assert:
    assertions:
      - type: assert_filter_denies
        name: confirm node1 filter block_access denies TCP traffic on port 22
        parameters:
          filters: 'node1["block_access"]'
          headers:
            applications: 'ssh'

Return Values

name	description	returned	type
result	List of assertion results. There is one entry per assertion, and each entry contains details of the assertion and additional information when the assertion fails.	always	list
summary	Summary of action(s) performed.	always	str

Status

This module is flagged as preview which means that it is not guaranteed to have a backwards compatible interface.