textFSM - output not in expected format #1126

kevindasilva03 · 2019-03-07T18:51:19Z

Possible bug...

Connecting with device type cisco_xe running the following command
mac_int_output = net_conn.send_command(f"show mac address-table", use_textfsm=True)
Results is a string of the entire MAC table.

Just for kicks... I reconnected to the XE device using device type cisco_ios and I get the following:

[{'destination_address': '0008.e3ff.fca8',
'type': 'static',
'vlan': '950',
'destination_port': 'Switch'}]

The result is only the first MAC entry in the table, but the format is what I'm looking for.

How do I go about troubleshooting this further.

Please advise and thanks for your help!

ktbyers · 2019-03-07T19:35:05Z

ntc_templates doesn't have an index for 'cisco_xe' i.e. they only have a category of 'cisco_ios'. You should be able to just switch to 'cisco_ios' for the device_type since that is identical to 'cisco_xe' from a Netmiko perspective.

kevindasilva03 · 2019-03-07T20:05:11Z

Thanks Kirk for the quick reply. Just to confirm, when using 'cisco_ios' and the output is only the first line, this is a textFSM issue? If so, I will follow up with them.

Thanks again!

ktbyers · 2019-03-07T20:14:56Z

Okay, I might have misunderstood your issue (or you second issue anyways)...so you are saying you set this to "cisco_ios" and you only get one entry back and you are expecting more than one entry?

[{'destination_address': '0008.e3ff.fca8',
'type': 'static',
'vlan': '950',
'destination_port': 'Switch'}]

kevindasilva03 · 2019-03-07T20:21:52Z

That is correct...

kevindasilva03 · 2019-03-07T20:22:22Z

Sample command output:

dd-r-vss#sh mac address-table
Unicast Entries
vlan mac address type protocols port
---------+---------------+--------+---------------------+-------------------------
950 0008.e3ff.fca8 static ip,ipx,assigned,other Switch
1105 0008.e3ff.fca8 static ip,ipx,assigned,other Switch
1105 0008.e3ff.fcac dynamic ip,ipx,assigned,other Port-channel30
1106 0008.e3ff.fca8 static ip,ipx,assigned,other Switch
1106 002a.6a8b.e343 dynamic ip,ipx,assigned,other TenGigabitEthernet1/1/1
1171 0008.e3ff.fca8 static ip,ipx,assigned,other Switch
1171 001b.baf8.ca15 dynamic ip,ipx,assigned,other Port-channel41
1171 001b.baf8.ca31 dynamic ip,ipx,assigned,other Port-channel41

ktbyers · 2019-03-07T20:30:28Z

I would first see the raw data of what Netmiko is getting back:

mac_int_output = net_conn.send_command(f"show mac address-table")

And print that variable out.

To isolate whether it is a Netmiko issue or a TextFSM issue.

kevindasilva03 · 2019-03-07T20:32:42Z

See below. Sample of output.

In [30]: mac_int_output = net_conn.send_command("show mac address-table")
In [33]: print(mac_int_output)
Unicast Entries
 vlan     mac address     type        protocols               port
---------+---------------+--------+---------------------+-------------------------
 950      0008.e3ff.fca8    static ip,ipx,assigned,other Switch
1105      0008.e3ff.fca8    static ip,ipx,assigned,other Switch
1105      0008.e3ff.fcac   dynamic ip,ipx,assigned,other Port-channel30
1106      0008.e3ff.fca8    static ip,ipx,assigned,other Switch
1106      002a.6a8b.e343   dynamic ip,ipx,assigned,other TenGigabitEthernet1/1/1
1171      0008.e3ff.fca8    static ip,ipx,assigned,other Switch
1171      001b.baf8.ca15   dynamic ip,ipx,assigned,other Port-channel41
1171      001b.baf8.ca31   dynamic ip,ipx,assigned,other Port-channel41
1171      001d.affe.7d33   dynamic ip,ipx,assigned,other Port-channel21

ktbyers · 2019-03-07T20:39:40Z

Looking at the TextFSM template...it looks like probably a TextFSM bug:

TYPE3
  ^\s+${VLAN}\s+${DESTINATION_ADDRESS}\s+${TYPE}\s+\S+\s+${DESTINATION_PORT} -> Record

I think ^\s+ needs changed to ^\s* (i.e. when the VLAN is 4 digits, then there is no leading whitespace).

cisco_ios_show_mac-address-table.template

kevindasilva03 · 2019-03-07T20:55:29Z

I've made the modification, still no go, but I've opened an issue with them to have it reviewed.

Thanks for your time. It's much appreciated!

ktbyers · 2019-03-07T20:59:58Z

Works for me (using your output data):

$ python textfsm.py ../ntc-templates/templates/cisco_ios_show_mac-address-table.template show_mac.txt 
FSM Template:
Value DESTINATION_ADDRESS ([0-9a-fA-F]{4}\.[0-9a-fA-F]{4}\.[0-9a-fA-F]{4})
Value TYPE (\w+)
Value VLAN (\w+)
Value DESTINATION_PORT (\S+)

Start
  ^Destination\s+Address\s+Address\s+Type\s+VLAN\s+Destination\s+Port -> TYPE1
  ^\s+vlan\s+mac address\s+type\s+learn\s+age\s+ports -> TYPE2
  ^\s+vlan\s+mac address\s+type\s+protocols\s+port -> TYPE3
  ^Vlan\s+Mac Address\s+Type\s+Ports -> TYPE4

TYPE1
  ^${DESTINATION_ADDRESS}\s+${TYPE}\s+${VLAN}\s+${DESTINATION_PORT} -> Record

TYPE2
  ^[\*|\s]\s+${VLAN}\s+${DESTINATION_ADDRESS}\s+${TYPE}\s+\S+\s+\S+\s+${DESTINATION_PORT} -> Record

TYPE3
  ^\s*${VLAN}\s+${DESTINATION_ADDRESS}\s+${TYPE}\s+\S+\s+${DESTINATION_PORT} -> Record

TYPE4
  ^\s+${VLAN}\s+${DESTINATION_ADDRESS}\s+${TYPE}\s+${DESTINATION_PORT} -> Record


FSM Table:
['DESTINATION_ADDRESS', 'TYPE', 'VLAN', 'DESTINATION_PORT']
['0008.e3ff.fca8', 'static', '950', 'Switch']
['0008.e3ff.fca8', 'static', '1105', 'Switch']
['0008.e3ff.fcac', 'dynamic', '1105', 'Port-channel30']
['0008.e3ff.fca8', 'static', '1106', 'Switch']
['002a.6a8b.e343', 'dynamic', '1106', 'TenGigabitEthernet1/1/1']
['0008.e3ff.fca8', 'static', '1171', 'Switch']
['001b.baf8.ca15', 'dynamic', '1171', 'Port-channel41']
['001b.baf8.ca31', 'dynamic', '1171', 'Port-channel41']
['001d.affe.7d33', 'dynamic', '1171', 'Port-channel21']

ktbyers · 2019-03-07T21:00:46Z

 TYPE3
-  ^\s+${VLAN}\s+${DESTINATION_ADDRESS}\s+${TYPE}\s+\S+\s+${DESTINATION_PORT} -> Record
+  ^\s*${VLAN}\s+${DESTINATION_ADDRESS}\s+${TYPE}\s+\S+\s+${DESTINATION_PORT} -> Record

ktbyers · 2019-03-07T21:01:40Z

Type2 and Type4 might also need to be edited as well.

kevindasilva03 · 2019-03-07T21:32:29Z

I updated the template, but when I ran the command as you did, it's not showing the update. Is it pulling from cache or buffer?

python textfsm.py .../ntc-templates/templates/cisco_ios_show_mac-address-table.template .../show_mac.txt

FSM Template:
Value DESTINATION_ADDRESS ([0-9a-fA-F]{4}.[0-9a-fA-F]{4}.[0-9a-fA-F]{4})
Value TYPE (\w+)
Value VLAN (\w+)
Value DESTINATION_PORT (\S+)

Start
^Destination\s+Address\s+Address\s+Type\s+VLAN\s+Destination\s+Port -> TYPE1
^\s+vlan\s+mac address\s+type\s+learn\s+age\s+ports -> TYPE2
^\s+vlan\s+mac address\s+type\s+protocols\s+port -> TYPE3
^Vlan\s+Mac Address\s+Type\s+Ports -> TYPE4

TYPE1
^${DESTINATION_ADDRESS}\s+${TYPE}\s+${VLAN}\s+${DESTINATION_PORT} -> Record

TYPE2
^[*|\s]\s+${VLAN}\s+${DESTINATION_ADDRESS}\s+${TYPE}\s+\S+\s+\S+\s+${DESTINATION_PORT} -> Record

TYPE3
^\s+${VLAN}\s+${DESTINATION_ADDRESS}\s+${TYPE}\s+\S+\s+${DESTINATION_PORT} -> Record

TYPE4
^\s+${VLAN}\s+${DESTINATION_ADDRESS}\s+${TYPE}\s+${DESTINATION_PORT} -> Record

FSM Table:
['DESTINATION_ADDRESS', 'TYPE', 'VLAN', 'DESTINATION_PORT']
['0008.e3ff.fca8', 'static', '950', 'Switch']

FROM THE TEMPLATE:

1 Value DESTINATION_ADDRESS ([0-9a-fA-F]{4}.[0-9a-fA-F]{4}.[0-9a-fA-F]{4})
2 Value TYPE (\w+)
3 Value VLAN (\w+)
4 Value DESTINATION_PORT (\S+)
5
6 Start
7 ^Destination\s+Address\s+Address\s+Type\s+VLAN\s+Destination\s+Port -> TYPE1
8 ^\s+vlan\s+mac address\s+type\s+learn\s+age\s+ports -> TYPE2
9 ^\s+vlan\s+mac address\s+type\s+protocols\s+port -> TYPE3
10 ^Vlan\s+Mac Address\s+Type\s+Ports -> TYPE4
11
12 TYPE1
13 ^${DESTINATION_ADDRESS}\s+${TYPE}\s+${VLAN}\s+${DESTINATION_PORT} -> Record
14
15 TYPE2
16 ^[*|\s]\s*${VLAN}\s+${DESTINATION_ADDRESS}\s+${TYPE}\s+\S+\s+\S+\s+${DESTINATION_PORT} -> Record
17
18 TYPE3
19 ^\s*${VLAN}\s+${DESTINATION_ADDRESS}\s+${TYPE}\s+\S+\s+${DESTINATION_PORT} -> Record
20
21 TYPE4
22 ^\s*${VLAN}\s+${DESTINATION_ADDRESS}\s+${TYPE}\s+${DESTINATION_PORT} -> Record

kevindasilva03 · 2019-03-07T21:52:50Z

Please disregard... I found my error... Thank for your help!!

Kevin

ktbyers closed this as completed Mar 7, 2019

ktbyers reopened this Mar 7, 2019

ktbyers mentioned this issue Mar 7, 2019

show_mac_address-table - Output contains single dictionary networktocode/ntc-templates#385

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ktbyers closed this as completed Mar 7, 2019

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textFSM - output not in expected format #1126

textFSM - output not in expected format #1126

kevindasilva03 commented Mar 7, 2019

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kevindasilva03 commented Mar 7, 2019 •

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textFSM - output not in expected format #1126

textFSM - output not in expected format #1126

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kevindasilva03 commented Mar 7, 2019

ktbyers commented Mar 7, 2019

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kevindasilva03 commented Mar 7, 2019 • edited Loading

FROM THE TEMPLATE:

kevindasilva03 commented Mar 7, 2019 • edited Loading

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edited by ktbyers

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