RPC to Count IPs in Prefix List

[bri...@seas.upenn.edu]

Model: ex2200-c-12t-2g
Junos: 14.1X53-D40.8

I'm looking for an RPC I can use to display to number of IPs in a prefix list. The equivalent of:

dev.cli("show configuration poilicy-options prefix-lists [PREFIX-LIST-NAME] | count")

show configuration policy-options prefix-lists | display xml rpc

is not a valid command. 

[Nitin Kumar]

For configurational data we have get_config RPC.

 

You can do for example

 

op = dev.rpc.get_config(filter_xml = etree.XML('<policy-options><prefix-list/></policy-options>'))
print etree.tostring(op)

 

How did I concluded above API, so below is the command on device which helped me

# show policy-options prefix-list test | display xml

<rpc-reply xmlns:junos="http://xml.juniper.net/junos/17.2D0/junos">

    <configuration junos:changed-seconds="1489078296" junos:changed-localtime="2017-03-09 22:21:36 IST">

            <policy-options>

                <prefix-list>

                    <name>test</name>

                </prefix-list>

            </policy-options>

    </configuration>

Thanks

Nitin Kr

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[Stacy W. Smith]

To expand on Nitin's suggestion...

Here's an example script that prompts for the prefix list name and prints the number of IPs in the prefix list. It works from the committed configuration after any group or commit script expansion:

import sys
import getpass
from lxml import etree

from jnpr.junos.device import Device

# Python3 is input(), Python2 is raw_input()
try:
    input = raw_input
except:
    pass

username = input('Device Username: ')
passwd = getpass.getpass('Device Password: ')
prefix_list = input('Prefix List Name: ')

for hostname in sys.argv[1:]:
    print("Connecting to %s..." % hostname)
    dev = Device(host=hostname, user=username, password=passwd, port=22)
    dev.open()
    filter_string = etree.XML('<policy-options><prefix-list><name>%s'
                              '</name></prefix-list></policy-options>' % (prefix_list))
    resp = dev.rpc.get_config(filter_xml=filter_string,
                              options={'database': 'committed',
                                             'inherit': 'inherit',
                                             'commit-scripts': 'apply', })
    xpath = 'policy-options/prefix-list[name="%s"]/prefix-list-item' % (prefix_list)
    items = resp.findall(xpath)
    count = 0
    if items is not None:
        count = len(items)
    print("Prefix list %s contains %d IPs." % (prefix_list,count)) 

--Stacy

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[bri...@seas.upenn.edu]

Thanks Nitin!

[bri...@seas.upenn.edu]

Very useful. Thanks for your help!

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