Automation

Hi,

I'm trying to collect the serial numbers of EX VC member switches using interactive Python:

>>> from jnpr.junos import Device

>>> dev=Device('10.181.15.4',user='user',password=’passwd’)

>>> dev.open()

Device(10.10.10.10)

>>>

>>> invfpc = dev.rpc.get_chassis_inventory()

>>> print(invfpc)

<Element chassis-inventory at 0x8d9525c>

>>>

>>> print invfpc.findtext('chassis/serial-number')

FP0212449XXX

>>> print invfpc.findtext('chassis-module/serial-number')

None

>>> print invfpc.findtext('chassis/chassis-module/serial-number')

FP0212449XXX

>>> 

>>> print invfpc.find('chassis/chassis-module/serial-number').text

FP0212449XXX

>>> print invfpc.findall('chassis/chassis-module/serial-number')

[<Element serial-number at 0x8d8475c>, <Element serial-number at 0x8d91bbc>, <Element serial-number at 0x8d91dec>, <Element serial-number at 0x8d952fc>]

>>>

As far as I understood, invfpc = dev.rpc.get_chassis_inventory() returns lxml. How can I get the actual serial numbers from [<Element serial-number at 0x8d8475c>?

Thanks,

Stefan

You may try invfpc.findall('chassis/chassis-module/serial-number')[0] as below.

>>> invfpc.findall('chassis/chassis-module/serial-number')[0]
<Element serial-number at 0x101545878>
>>> invfpc.findall('chassis/chassis-module/serial-number')[0].text
'BP0208137931'
>>> x = invfpc.findall('chassis/chassis-module/serial-number')[0].text
>>> print x
BP0208137931
>>> 

Thanks,

/Charlie

Hi Charlie,

indeed, this did the trick for me. 🙂

With

>>> test=invfpc.findall('chassis/chassis-module/serial-number')

>>> len(test)

4

>>> print test[0].text

FP0212449750

>>> print test[1].text

FP0212449791

>>> print test[2].text

FP0212449750

>>> print test[3].text

FP0212449791

I'm able to get the required information. Unfortunately the serial numbers for master and backup RE appear twice - which is clear when looking at the following output:

root@switch> show chassis hardware models | display xml
<rpc-reply xmlns:junos="http://xml.juniper.net/junos/12.3R3/junos">
    <chassis-inventory xmlns="http://xml.juniper.net/junos/12.3R3/junos-chassis">
        <chassis junos:style="model-inventory">
            <chassis-module>
                <name>Routing Engine 0</name>
                <version>REV 21</version>
                <part-number>750-034195</part-number>
                <serial-number>FP0212449750</serial-number> <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
                <description>EX4200-48PX,48 POE+</description>
                <clei-code>COMLJ10BRC</clei-code>
                <model-number>EX4200-48PX</model-number>
            </chassis-module>
            <chassis-module>
                <name>Routing Engine 1</name>
                <version>REV 21</version>
                <part-number>750-034195</part-number>
                <serial-number>FP0212449791</serial-number> <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
                <description>EX4200-48PX,48 POE+</description>
                <clei-code>COMLJ10BRC</clei-code>
                <model-number>EX4200-48PX</model-number>
            </chassis-module>
            <chassis-module>
                <name>FPC 0</name>
                <version>REV 21</version>
                <part-number>750-034195</part-number>
                <serial-number>FP0212449750</serial-number><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
                <description>EX4200-48PX,48 POE+</description>
                <clei-code>COMLJ10BRC</clei-code>
                <model-number>EX4200-48PX</model-number>
                <chassis-sub-module>
                    <name>PIC 0</name>
                    <part-number>BUILTIN</part-number>
                    <serial-number>BUILTIN</serial-number>
                    <description>48x 10/100/1000 Base-T</description>
                    <clei-code>COMLJ10BRC</clei-code>
                    <model-number>EX4200-48PX</model-number>
                </chassis-sub-module>
                <chassis-sub-module>
                    <name>PIC 1</name>
                    <version>REV 07</version>
                    <part-number>711-026017</part-number>
                    <serial-number>CH0212438690</serial-number>
                    <description>2x 10GE SFP+</description>
                    <clei-code>COUIAWXBAA</clei-code>
                    <model-number>EX-UM-2X4SFP</model-number>
                </chassis-sub-module>
                <chassis-sub-module>
                    <name>Power Supply 0</name>
                    <version>REV 01</version>
                    <part-number>740-046492</part-number>
                    <serial-number>GH2912479376</serial-number>
                    <description>PS 930W AC</description>
                    <clei-code>CMUPABNBAA</clei-code>
                    <model-number>EX-PWR3-930-AC</model-number>
                </chassis-sub-module>
                <chassis-sub-module>
                    <name>Power Supply 1</name>
                    <version>REV 01</version>
                    <part-number>740-046492</part-number>
                    <serial-number>GH2912391363</serial-number>
                    <description>PS 930W AC</description>
                    <clei-code>CMUPABNBAA</clei-code>
                    <model-number>EX-PWR3-930-AC</model-number>
                </chassis-sub-module>
            </chassis-module>
            <chassis-module>
                <name>FPC 1</name>
                <version>REV 21</version>
                <part-number>750-034195</part-number>
                <serial-number>FP0212449791</serial-number><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
                <description>EX4200-48PX,48 POE+</description>
                <clei-code>COMLJ10BRC</clei-code>
                <model-number>EX4200-48PX</model-number>
                <chassis-sub-module>
                    <name>PIC 0</name>
                    <part-number>BUILTIN</part-number>
                    <serial-number>BUILTIN</serial-number>
                    <description>48x 10/100/1000 Base-T</description>
                    <clei-code>COMLJ10BRC</clei-code>
                    <model-number>EX4200-48PX</model-number>
                </chassis-sub-module>
                <chassis-sub-module>
                    <name>PIC 1</name>
                    <version>REV 07</version>
                    <part-number>711-021270</part-number>
                    <serial-number>AR0213191364</serial-number>
                    <description>4x GE SFP</description>
                    <clei-code>COUIAREBTA</clei-code>
                    <model-number>EX-UM-4SFP</model-number>
                </chassis-sub-module>
                <chassis-sub-module>
                    <name>Power Supply 0</name>
                    <version>REV 01</version>
                    <part-number>740-046492</part-number>
                    <serial-number>GH2912391364</serial-number>
                    <description>PS 930W AC</description>
                    <clei-code>CMUPABNBAA</clei-code>
                    <model-number>EX-PWR3-930-AC</model-number>
                </chassis-sub-module>
                <chassis-sub-module>
                    <name>Power Supply 1</name>
                    <version>REV 01</version>
                    <part-number>740-046492</part-number>
                    <serial-number>GH2912456933</serial-number>
                    <description>PS 930W AC</description>
                    <clei-code>CMUPABNBAA</clei-code>
                    <model-number>EX-PWR3-930-AC</model-number>
                </chassis-sub-module>
            </chassis-module>
        </chassis>
    </chassis-inventory>
    <cli>
        <banner>{master:0}</banner>
    </cli>
</rpc-reply>

Is there a more elegant way than doing post-processing on

>>> test=invfpc.findall('chassis/chassis-module/serial-number')

?

Thanks in advance,

Stefan

Try this.

>>> x= invfpc.xpath('.//chassis-module[starts-with(name,"Routing Engine")]/serial-number')
>>> x[0].text
'BP0208137931'
>>> 

 Thanks,

/Charlie

It might be this ...

>>> x= invfpc.xpath('.//chassis-module[starts-with(name,"FPC")]/serial-number')

 Thanks,

/Charlie

That's exactly what I was looking for... awesome. Thanks a lot.

If you'd like to use the Junos PyEZ "Tables/Views" mechanism and avoid coding XML/XPath, please take a look at this example:

https://github.com/Juniper/py-junos-eznc/blob/master/lib/jnpr/junos/op/xcvr.yml

And a short video abou tthis here:

http://vimeo.com/album/2664261/video/82843211

Hope this helps!