IOS XR Parser for ISIS (ShowIsis)

Genie generate error due a missing keys.

`Issue while parsing: <class 'genie.libs.parser.iosxr.show_isis.ShowIsis'>

Traceback (most recent call last):
  File "src/genie/cli/commands/learn.py", line 343, in genie.cli.commands.learn.LearnCommand._retrieve_ops
  File "/home/mpls/fipo/lib64/python3.6/site-packages/genie/libs/ops/isis/iosxr/isis.py", line 313, in learn
    self.make()
  File "/home/mpls/fipo/lib64/python3.6/site-packages/genie/ops/base/base.py", line 101, in make
    self.maker.make(*args, **kwargs)
  File "src/genie/ops/base/maker.py", line 312, in genie.ops.base.maker.Maker.make
  File "src/genie/ops/base/maker.py", line 418, in genie.ops.base.maker.Maker._call_parser
  File "src/genie/metaparser/_metaparser.py", line 302, in genie.metaparser._metaparser.MetaParser.parse
  File "src/genie/metaparser/_metaparser.py", line 284, in genie.metaparser._metaparser.MetaParser.parse
  File "src/genie/metaparser/util/schemaengine.py", line 405, in genie.metaparser.util.schemaengine.Schema.validate
genie.metaparser.util.exceptions.SchemaMissingKeyError: Missing keys: [['instance', 'core', 'vrf', 'default', 'topology', 'IPv4 Unicast', 'vrf', 'default', 'protocols_redistributed']]`

[ahersi2-cisco]

Hi @filippohronsky,

Sorry for the late reply, and thanks for providing the supporting information. A small tweak in the schema of this parser will fix your issue. The key called ;

protocols_redistributed

Can be changed to be an optional key. You should see other keys with similar behavior in the code. It should be around line 496 of show_isis.py file in the iosxr directory. Feel free to submit a PR if this change works for you, and if it doesn’t please let me know.

Thank you, Abdurahman

[filippohronsky]

Hi @ahersi2-cisco, here is also output of show isis command. In genieparser there is mention about vrf, but show isis command isn’t include that information.

RP/0/RSP0/CPU0:A9K10#show isis
Tue Jun  9 07:59:23.124 CEST

IS-IS Router: core
  System Id: 0000.0000.0064 
  Instance Id: 0
  IS Levels: level-1
  Manual area address(es):
    01
  Routing for area address(es):
    01
  Non-stop forwarding: Cisco Proprietary NSF Restart enabled
  Most recent startup mode: Cold Restart
  TE connection status: Down
  Topologies supported by IS-IS:
    IPv4 Unicast
      Level-1
        Metric style (generate/accept): Wide/Wide
        Metric: 10
        ISPF status: Disabled
        TE Enabled
      Redistributing:
        BGP AS 65535
      Distance: 115
      Advertise Passive Interface Prefixes Only: Yes
  SRLB not allocated
  SRGB not allocated
  Interfaces supported by IS-IS:
    Bundle-Ether2 is running suppressed (active in configuration)
    Loopback0 is running passively (passive in configuration)
    GigabitEthernet0/2/0/0 is running suppressed (active in configuration)
    TenGigE0/2/1/2 is running suppressed (active in configuration)
    TenGigE0/2/1/3 is disabled (active in configuration)

Parser: genieparser/src/genie/libs/parser/iosxr/show_isis.py

class ShowIsisSchema(MetaParser):
    ''' Schema for commands:
        * show isis
        * show isis protocol
    '''
    schema = {
        'instance': {
            Any(): {
                'process_id': str,
                'instance': str,
                **'vrf': {
                    Any(): {**
                        'system_id': str,
                        'is_levels': str,
                        Optional('manual_area_address'): list,
                        Optional('routing_area_address'): list,

Hopefully, it was helpful.