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NSO - IOS XML Template for xconnect section - MTU problem

Maurizio Bau
Level 1
Level 1

‎03-20-2020 03:31 PM

Hi All

 

I created an NSO Packages to modify following ios configuration on l2vpn istance, (for example 7609 )

 

interface GigabitEthernet9/1
 description porta per TEST NSO
 mtu 9216
 service instance 150 ethernet
  encapsulation dot1q 150
  rewrite ingress tag pop 1 symmetric
  xconnect 172.16.12.1 250150 encapsulation mpls
   backup peer 1.1.1.1 4562
   mtu 9202

In my package, I created an xml template similiar like that

 

 

<interface xmlns="urn:ios">
	<GigabitEthernet when="{$remotePortType = 'GigabitEthernet'}">
	<name>{$remotePortId}</name>
		<service>
			 <instance>
				<id>{$remoteServiceInstance}</id>
				<xconnect tags="merge">
				 <address>{$localL9New}</address>
				<vcid>{$pwIdNew}</vcid>
					  <backup>
						<peer>
						  <peer-router-ip-addr>{$neighborRemoteBk}</peer-router-ip-addr>
						  <vcid>{$pwIdRemoteBk}</vcid>
						</peer>
					  </backup>
					  <mtu>{$remoteMtu}</mtu>
					</xconnect>
				  </instance>
				</service>
			</GigabitEthernet>

After Packages Reload, I don't have error o log, but when I commit a packages I see different problem

 

 

  1. MTU on xconnect section are not present on the device but are present on NSO DB configuration
    •  service instance 150 ethernet
  xconnect 172.16.12.2 4545656 encapsulation mpls
 !
      devices device A1-MDR
 config
  ios:interface GigabitEthernet9/1
   description   porta per TEST NSO
   no switchport
   service instance 150 ethernet
    encapsulation dot1q 150
    rewrite ingress tag pop 1 symmetric
    xconnect 172.16.12.1 250150 encapsulation mpls
     backup peer 1.1.1.1 4562
     no mpls control-word
     mtu 9202
    exit
   exit
  2. When i launch Rollaback session, MTU value are not present on Device.

I tried to use different tags on xml xconncet section or xml mtu section, create, merge, replace, without solution.

I tried to use xconnect with tag "delete" and section with tag "create" but without to reach a goal.

 

Do you have any idea?

Thanks a lot for any indication

Bye Bye

Maurizio

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6 Replies 6

rogaglia
Cisco Employee
Cisco Employee

‎03-23-2020 01:01 AM

Hi,

Do the following and re-post:

 

1) Do a show running of the interface in NSO before committing the service.

 

2) Try to debug your problem via:

#commit dry-run | debug template

 

3) When the service is committed, try to run:

#show running myservice myserviceinstance | show service-meta

 

The second will give more insights into the insights of NSO.

 

Regards,

Roque

0 Helpful

Maurizio Bau
Level 1
Level 1
In response to rogaglia

‎03-23-2020 07:51 AM

Hi Roque

 

Thanks a lot for your replay.

I maked your steps and this is the results

1) Do a show running of the interface in NSO before committing the service.
   

interface GigabitEthernet9/1
 description porta per TEST NSO Valerio
 mtu 9216
 service instance 150 ethernet
  encapsulation dot1q 150
  rewrite ingress tag pop 1 symmetric
  xconnect 172.16.12.1 250150 encapsulation mpls
   mtu 9202



2) Try to debug your problem via:
#commit dry-run | debug template

In following code, section about IOS template, in attached file "Debug", all log

Context node: /services/movePWService:movePWService[name='mau2']
Result: "A1-MDR"
Operation 'merge' on existing node: /devices/device[name='A1-MDR'] (from file "OPM-Feeder-IOS.xml", line 45)
Evaluating conditional expression "boolean($remotePortType = 'GigabitEthernet')" (from file "OPM-Feeder-IOS.xml", line 73)
Context node: /services/movePWService:movePWService[name='mau2']
Result: true - continuing
Evaluating "$remotePortId" (from file "OPM-Feeder-IOS.xml", line 74)
Context node: /services/movePWService:movePWService[name='mau2']
Result: "9/1"
Operation 'merge' on existing node: /devices/device[name='A1-MDR']/config/ios:interface/GigabitEthernet[name='9/1'] (from file "OPM-Feeder-IOS.xml", line 74)
Evaluating "$remoteServiceInstance" (from file "OPM-Feeder-IOS.xml", line 77)
Context node: /services/movePWService:movePWService[name='mau2']
Result: "150"
Operation 'merge' on existing node: /devices/device[name='A1-MDR']/config/ios:interface/GigabitEthernet[name='9/1']/service/instance[id='150'] (from file "OPM-Feeder-IOS.xml", line 77)
Operation 'merge' on existing node: /devices/device[name='A1-MDR']/config/ios:interface/GigabitEthernet[name='9/1']/service/instance[id='150']/xconnect (from file "OPM-Feeder-IOS.xml", line 78)
Operation 'replace' on node: /devices/device[name='A1-MDR']/config/ios:interface/GigabitEthernet[name='9/1']/service/instance[id='150']/xconnect/address (from file "OPM-Feeder-IOS.xml", line 79)
Evaluating "$localL9New" (from file "OPM-Feeder-IOS.xml", line 79)
Context node: /services/movePWService:movePWService[name='mau2']
Result: "172.16.12.2"
Setting /devices/device[name='A1-MDR']/config/ios:interface/GigabitEthernet[name='9/1']/service/instance[id='150']/xconnect/address to "172.16.12.2"
Operation 'replace' on node: /devices/device[name='A1-MDR']/config/ios:interface/GigabitEthernet[name='9/1']/service/instance[id='150']/xconnect/vcid (from file "OPM-Feeder-IOS.xml", line 80)
Evaluating "$pwIdNew" (from file "OPM-Feeder-IOS.xml", line 80)
Context node: /services/movePWService:movePWService[name='mau2']
Result: "4545656"
Setting /devices/device[name='A1-MDR']/config/ios:interface/GigabitEthernet[name='9/1']/service/instance[id='150']/xconnect/vcid to "4545656"
Evaluating conditional expression "boolean($neighborRemoteBk != 'None')" (from file "OPM-Feeder-IOS.xml", line 81)
Context node: /services/movePWService:movePWService[name='mau2']
Result: false - skipping siblings
Operation 'merge' on existing node: /devices/device[name='A1-MDR']/config/ios:interface/GigabitEthernet[name='9/1']/service/instance[id='150']/xconnect/mtu (from file "OPM-Feeder-IOS.xml", line 87)
Fetching literal "9202" (from file "OPM-Feeder-IOS.xml", line 87)
Setting /devices/device[name='A1-MDR']/config/ios:interface/GigabitEthernet[name='9/1']/service/instance[id='150']/xconnect/mtu to "9202"



3) When the service is committed, try to run:
#show running myservice myserviceinstance | show service-meta

nso@ncs# show running-config services movePWService mau2 | display service-meta-data
services movePWService mau2
mdrSrcName OPM-9K1-F1
mdrSrcIf GigabitEthernet0/4/1/7
peSrcName OPM-RGJIT001
peSrcIf xe-1/0/0
peSrcUnit 250
peSrcSvlan 250
peSrcCvlan 1000
mdrDstName OPM-9K1-F2
mdrDstIf TenGigE0/6/0/4
peDstName OPM-RGJIT001
peDstIf xe-1/0/0
peDstUnit 250
!
nso@ncs#

You can see IOS Template in attached rar file,

Grazie

Bye

Maurizio

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OPM-Feeder-IOS.zip
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rogaglia
Cisco Employee
Cisco Employee
In response to Maurizio Bau

‎03-23-2020 10:43 AM

hi,

 

I shoudl have say that you need to get the device configuration service meta data:

 

nso@ncs# show running-config device device Mydevice config ios:interface | display service-meta-data

However, I believe NSO is working as designed. NSO will return the the original configuration when deleted, which in this case is the MTU configured.

 

Service "redeploy reconcilate" will allow you to change the behavior. It is well explained in the developer guides.

 

Roque

0 Helpful

Maurizio Bau
Level 1
Level 1
In response to rogaglia

‎03-25-2020 02:28 AM

@rogaglia wrote:

hi,

 

I shoudl have say that you need to get the device configuration service meta data:

 

No problems, logs are free... :-)

 

nso@ncs# show running-config device device Mydevice config ios:interface | display service-meta-data

 

 

 

Service-meta-data log on IOS device by NSO showing this configuration

nso@ncs# show running-config devices device A1-MDR config ios:interface GigabitEthernet 9/1 | display service-meta-data                
devices device A1-MDR
 config
  ! Refcount: 2
  ! Backpointer: [ /ncs:services/movePWService:movePWService[movePWService:name='mau2'] ]
  ios:interface GigabitEthernet9/1
   description   porta per TEST NSO Valerio
   no switchport
   ! Refcount: 2
   ! Backpointer: [ /ncs:services/movePWService:movePWService[movePWService:name='mau2'] ]
   service instance 150 ethernet
    encapsulation dot1q 150
    rewrite ingress tag pop 1 symmetric
    service-policy input IN
    service-policy output OUT
    ! Refcount: 2
    ! Backpointer: [ /ncs:services/movePWService:movePWService[movePWService:name='mau2'] ]
    xconnect 172.16.12.2 753159 encapsulation mpls
     no mpls control-word
     ! Refcount: 2
     ! Originalvalue: 9202
     mtu 9202
    exit
   exit

I’m going to read the developers guide, but the service re-deploy reconcilate doesn’t seem to work.

 

nso@ncs# services movePWService mau2 re-deploy reconcile 
Error: no registration found for callpoint movePWService-servicepoint/service_create of type=external
nso@ncs# *** ALARM service-activation-failure: no registration found for callpoint movePWService-servicepoint/service_create of type=external
!
nso@ncs(config)# services movePWService mau2 re-deploy reconcile 
Error: no registration found for callpoint movePWService-servicepoint/service_create of type=external
nso@ncs(config)#

So, Thanks a lot for your response and I'll write in this post if i find some solution/indication

 

Have a nice day

Ciao

Maurizio

0 Helpful

rogaglia
Cisco Employee
Cisco Employee
In response to Maurizio Bau

‎03-25-2020 07:13 AM

Hi Maurizio,

 

Two points

1) You have a problem with your package as a callback is not found. You probably need to check it for errors and do a "package reload".

2) If you seem you have one Backpointer and RefCount=2. This means that when the service will be deleted, the values will be left as they are or returned to its original value, instead of deleting them.

 

Try your service by first deleting the target config in the device. There, the RefCount will be =1 and the config will be deleted when deleting the service.

Roque

0 Helpful

Maurizio Bau
Level 1
Level 1
In response to rogaglia

‎03-29-2020 09:21 AM

Hi Roque

 

Sorry for delay response and thanks for continou feedback to solve a problem

I followed your indication but i don't found a solution or one key to solve a problem.

I checked my packages, I verified python section about IOS apply template and controlled my template but i don't know if.... "there is light at the end of the tunnel" :-(


So,

I created a Case report pdf file to aggregate all steps on this test

- Clear all services

- Start config with MTU 9202

- Config service

- Commit dryrun with debug template

- commit

- Verify RefCount ( Not change, RefCount remain on value "2")

- Rollback

 

For all detail, please see the attached pdf file.

At the same time, I showed the IOS-XR configuration about same services, and I found RefCount ugual 1

 

nso@ncs# show running-config devices device OPM-9K1-F2 config cisco-ios-xr:interface TenGigE 0/6/0/4.251 | display service-meta-data
devices device OPM-9K1-F2
 config
  ! Refcount: 1
  ! Backpointer: [ /ncs:services/movePWService:movePWService[movePWService:name='mau3'] ]
  cisco-ios-xr:interface TenGigE 0/6/0/4.251 l2transport
   encapsulation dot1q 2 second-dot1q 251
   no shutdown
   ! Refcount: 1
   rewrite ingress tag pop 2 symmetric
  exit
 !

 

 

Test Nr 2 - Modify backup xconnect configuration

To clear all doubts about IOS template, I created a second template to modify backup xconnect configuation

IOS CLI Configuration

 

interface GigabitEthernet9/1
 description porta per TEST NSO Valerio
 mtu 9216
 service instance 250 ethernet
  encapsulation dot1q 250
  rewrite ingress tag pop 1 symmetric
  xconnect 172.16.12.7 7777250 encapsulation mpls
   backup peer 172.16.12.1 250250
   mtu 9202

IOS BK XML Template

 

 

---- Part of XML BACKUP IOS TEMPLATE ----
<interface xmlns="urn:ios">
  <GigabitEthernet when="{$remotePortType = 'GigabitEthernet'}">
     <name>{$remotePortId}</name>
	<service>
	   <instance>
		<id>{$remoteServiceInstance}</id>
		  <xconnect>
		        <address>{$neighborRemote}</address>
			<vcid>{$pwIdRemote}</vcid>
			<encapsulation>mpls</encapsulation>
			<backup tags="delete">
			</backup>
			<backup>
			    <peer>
				<peer-router-ip-addr>{$localL9New}</peer-router-ip-addr>
				<vcid>{$pwIdNew}</vcid>
			    </peer>
			</backup>
			<mtu>9202</mtu>
		</xconnect>
	    </instance>
	</service>
   </GigabitEthernet>

I execute the same services, but this time I don't have any problem, BackUp are correctly modified and MTU are not erased

 

I verified also the service-meta-data and also in this case, I have a RefCount egual to "2"

 

 

devices device A1-MDR
 config
  ! Refcount: 2
  ! Backpointer: [ /ncs:services/movePWService:movePWService[movePWService:name='mau3'] ]
  ios:interface GigabitEthernet9/1
   description   porta per TEST NSO Valerio
   no switchport
   ! Refcount: 2
   ! Backpointer: [ /ncs:services/movePWService:movePWService[movePWService:name='mau3'] ]
   service instance 250 ethernet
    encapsulation dot1q 250
    rewrite ingress tag pop 1 symmetric
    service-policy input IN
    service-policy output OUT
    ! Refcount: 2
    ! Backpointer: [ /ncs:services/movePWService:movePWService[movePWService:name='mau3'] ]
    xconnect 172.16.12.7 7777250 encapsulation mpls
     ! Refcount: 2
     ! Originalvalue: 172.16.12.1
     backup peer 172.16.12.2 999999
     no mpls control-word
     ! Refcount: 2
     ! Originalvalue: 9202
     mtu 9202
    exit
   exit

 

 

Test Nr 3 - Clear all service instance and recreate with same number configuration

I tried also with delete the service instance on xml template and create but the problem remain the same.

 

 

 

nso@ncs# show running-config devices device A1-MDR config ios:interface GigabitEthernet 9/1 | display service-meta-data
devices device A1-MDR
 config
  ! Refcount: 2
  ! Backpointer: [ /ncs:services/movePWService:movePWService[movePWService:name='mau2'] ]
  ios:interface GigabitEthernet9/1
   description   porta per TEST NSO Valerio
   no switchport
   ! Refcount: 2
   ! Backpointer: [ /ncs:services/movePWService:movePWService[movePWService:name='mau2'] ]
   service instance 150 ethernet
    encapsulation dot1q 150
    rewrite ingress tag pop 1 symmetric
    service-policy input IN
    service-policy output OUT
    ! Refcount: 2
    ! Backpointer: [ /ncs:services/movePWService:movePWService[movePWService:name='mau2'] ]
    xconnect 172.16.12.2 1234567 encapsulation mpls
     no mpls control-word
     ! Refcount: 2
     ! Originalvalue: 9202
     mtu 9202
    exit
   exit

 

 

Last Test - New packages IOS

I created a new packages, without python logic and only with 1 template xml. This packages remove only shutdown configuration on a GIgabitEthernet interface.

The goal of this are to verify RefCount value

 

 

<config-template xmlns="http://tail-f.com/ns/config/1.0"
                 servicepoint="port-turn-up">
  <devices xmlns="http://tail-f.com/ns/ncs">
    <device>
     <name>{/device}</name>
      <config>
	   <interface xmlns="urn:ios">
		<GigabitEthernet>
			<name>{/interface_id}</name>
			<shutdown tags="delete"></shutdown>
		</GigabitEthernet>
       </interface>
      </config>
    </device>
  </devices>
</config-template>

When I lanch the services, debug template are simply this

nso@ncs(config-port-turn-up-TestRFCOUNT)# commit dry-run | debug template 
Evaluating "/device" (from file "port-turn-up-template.xml", line 10)
Context node: /services/port-turn-up:port-turn-up[name='TestRFCOUNT']
Result:
For /services/port-turn-up:port-turn-up[name='TestRFCOUNT'], it evaluates to "A1-MDR"
Operation 'merge' on existing node: /devices/device[name='A1-MDR'] (from file "port-turn-up-template.xml", line 10)
The device /devices/device[name='A1-MDR'] does not support namespace 'http://tail-f.com/ned/cisco-ios-xr' for node "interface" (from file "port-turn-up-template.xml", line undefined)
Skipping...
Evaluating "/interface_id" (from file "port-turn-up-template.xml", line 20)
Context node: /services/port-turn-up:port-turn-up[name='TestRFCOUNT']
Result:
For /services/port-turn-up:port-turn-up[name='TestRFCOUNT'], it evaluates to "9/5"
Operation 'merge' on existing node: /devices/device[name='A1-MDR']/config/ios:interface/GigabitEthernet[name='9/5'] (from file "port-turn-up-template.xml", line 20)
Operation 'delete' on node: /devices/device[name='A1-MDR']/config/ios:interface/GigabitEthernet[name='9/5']/shutdown (from file "port-turn-up-template.xml", line 21)
cli {
    local-node {
        data  devices {
                  device A1-MDR {
                      config {
                          ios:interface {
                              GigabitEthernet 9/5 {
             -                    shutdown;
                              }
                          }
                      }
                  }
              }
              services {
             +    port-turn-up TestRFCOUNT {
             +        device A1-MDR;
             +        interface_type GigabitEthernet;
             +        interface_id 9/5;
             +    }
              }
    }
}

After commit, the RefCount on this interface are..

 

nso@ncs# show running-config devices device A1-MDR config ios:interface GigabitEthernet 9/5 | display service-meta-data
devices device A1-MDR
 config
  ! Refcount: 2
  ! Backpointer: [ /ncs:services/port-turn-up:port-turn-up[port-turn-up:name='TestRFCOUNT'] ]
  ios:interface GigabitEthernet9/5
   no switchport
   no ip address
   no shutdown
  exit
 !
!
nso@ncs#

Maybe I will make a mistake, but it would seem that ned IOS always sets RefCount to 2

I hope all tests are clear

Regards

Maurizio

 

 

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