Hi, experts
Encounter a question about the ref-counter.
I created a demo service to make it clear. The demo service named classtest will configure a fixed class-map on the device.
The steps are as below.
1. creating the service instance s1 to configure the class-map to device. And the refcounter of the class-map in CDB is 1.
2. creating the service instance s2, the configure won’t deploy to the device as it already exists. And the refcounter in CDB increase to 2.
3. delete the service instance s1. The expected behavior should be only decrease the refcounter to 1 in CDB and no configuration change to device, right?
But the fact in my test is the class-map is deleted in the device. Not only the content of the class-map, but the class-map itself.
Below is the terminal output of my operation.
admin@ncs(config)#
admin@ncs(config)# services classtest svc1 name a1 device r1
admin@ncs(config-classtest-svc1)# commit dry-run outformat native
native {
device {
name r1
data class-map a1
match precedence 2 3
end-class-map
!
}
}
admin@ncs(config-classtest-svc1)# commit
Commit complete.
admin@ncs(config-classtest-svc1)# end
admin@ncs# show running-config devices device r1 config cisco-ios-xr:class-map a1 | display xml
<config xmlns="http://tail-f.com/ns/config/1.0">
<devices xmlns="http://tail-f.com/ns/ncs">
<device>
<name>r1</name>
<config>
<class-map xmlns="http://tail-f.com/ned/cisco-ios-xr" refcounter="1" backpointer="[ /ncs:services/classtest:classtest[classtest:svc='svc1'] ]" >
<name>a1</name>
<match>
<precedence>
<list>2</list>
<list>3</list>
</precedence>
</match>
</class-map>
</config>
</device>
</devices>
</config>
admin@ncs# config t
Entering configuration mode terminal
admin@ncs(config)# services classtest svc2 name a1 device r1
admin@ncs(config-classtest-svc2)# commit dry-run outformat native
native {
}
admin@ncs(config-classtest-svc2)# commit
Commit complete.
admin@ncs(config-classtest-svc2)# end
admin@ncs# show running-config devices device r1 config cisco-ios-xr:class-map a1 | display xml
<config xmlns="http://tail-f.com/ns/config/1.0">
<devices xmlns="http://tail-f.com/ns/ncs">
<device>
<name>r1</name>
<config>
<class-map xmlns="http://tail-f.com/ned/cisco-ios-xr" refcounter="2" backpointer="[ /ncs:services/classtest:classtest[classtest:svc='svc1'] /ncs:services/classtest:classtest[classtest:svc='svc2'] ]" >
<name>a1</name>
<match>
<precedence>
<list>2</list>
<list>3</list>
</precedence>
</match>
</class-map>
</config>
</device>
</devices>
</config>
admin@ncs# config t
Entering configuration mode terminal
admin@ncs(config)# no services classtest svc1
admin@ncs(config)# commit dry-run outformat native
native {
device {
name r1
data class-map a1
no match precedence 2 3 //the class-map should not be delete.
end-class-map
!
}
}
admin@ncs(config)# commit
Commit complete.
admin@ncs(config)# end
admin@ncs# show running-config devices device r1 config cisco-ios-xr:class-map a1 | display xml
<config xmlns="http://tail-f.com/ns/config/1.0">
<devices xmlns="http://tail-f.com/ns/ncs">
<device>
<name>r1</name>
<config>
<class-map xmlns="http://tail-f.com/ned/cisco-ios-xr" refcounter="1" backpointer="[ /ncs:services/classtest:classtest[classtest:svc='svc2'] ]" >
<name>a1</name>
</class-map>
</config>
</device>
</devices>
</config>
The class-map is delete on the device.
RP/0/RSP0/CPU0:11_tj-e-2#sh run class-map a1
Tue Oct 25 06:45:40.921 UTC
% No such configuration item(s)
RP/0/RSP0/CPU0:11_tj-e-2#
The NSO version is 4.2.1 and NED is cisco-ios-xr 4.4.1. I also tried NED cisco-ios-xr 4.4.5 and got the same result.
Is there anything wrong?
Thanks.
Best regards.
—
He Chang
