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--- guides:user:scenarios:cmd_parse_cisco [2020/01/15 13:55] – ↷ Links adapted because of a move operation jkuiterman
+++ guides:user:scenarios:cmd_parse_cisco [2024/07/03 12:31] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
+===== Command parsing on Cisco IOS finding interfaces and ports =====
+The goal of this example is to find interfaces that belong to specific vlans.
+Create a new Command Job and save it using a desired name.
+==== Command Job ====
+The job is "empty". It still requires something though, so it's filled with a '!'.
+<code>
+!
+</code>
+==== Parsing template parsevlan ====
+The command that is used is //show vlan | i user|data//.
+This parse template will match specifically on the word "active". For those lines it will set the vlannumber and vlandescr variables.
+<code>
+<vlannumber> <vlandescr> active |*|
+</code>
+==== Parsing template intfnumber ====
+The command //show int switchport | i Name:|Access Mode VLAN// is used to find the combination of information of interface and (data) vlan.
+In this parsing template and ''%'' sign is used to create a hash to store the other variables in relation to it. This allows to retrieve the <accessvlan> variable using the following inside a loop in the scenario:
+''%%<<%%interface>.accessvlan%intf>''
+<code>
+Name: <%interface>
+Access Mode VLAN: <accessvlan>
+</code>
+Make sure to read the [[menu:operate:scenarios:syntax#hash_variables|hash article]] on how <variable> is different than <%variable>.
+==== Job scenario ====
+<code>
+Description Parsing vlan and interfaces on <node>
+task := scn_parse_vlan_intf
+</code>
+==== Scenario scn_parse_vlan_intf ====
+<code>
+# Test whether node is live and reachable
+reachable -n <node>
+if <error>
+    LogAction -n <node> -a Parse_job -m "<node> is not reachable"
+    stop
+endif
+LogAction -n <node> -a Parse_job -m "<node> is reachable"
+<%cmd> := parse_cmd -n <node> -t parsevlan -r "show vlan"
+<vlans> := keys <%cmd>
+foreach <vlan> in <vlans>
+    log -m "vlan: <vlan>"
+    <%intf> := parse_cmd -n <node> -t intfnumber -r "show int switchport \\| i Name:\\|Access Mode VLAN"
+    <interfaces> := keys <%intf>
+    foreach <interface> in <interfaces>
+        log -m "interface: <interface>"
+        log -m "vlan: <<interface>.accessvlan%intf>"
+        if "<<interface>.accessvlan%intf> == <vlan>"
+            log -m "Interface found, generating and/or appending configuration"
+            config_create -n <node> -t user_interface -f <node>_user_intf.cmd -x
+            if <error>
+                Logaction -n <node> -m "Failed to create the template for <node>"
+                Stop
+            endif
+    endeach
+endeach
+log -m "Pushing new configuration"
+config_exec -n <node> -f <node>_user_intf.cmd
+if <error>
+    Logaction -n <node> -m "Failed to configure <node> commands"
+    Stop
+endif
+end
+</code>
+Some things to note: \\
+  * ''    <interfaces> := keys <%intf>'', this is required to be able to loop over the created hash/dictionary.
+  * Config is being generated for every interface in addition and once completely done, it will be pushed to the device.
+  * ''|'' (pipes) need to be escaped (double). This is because the can also be used as conditionals.