December 2018
Intermediate to advanced
226 pages
4h 57m
English
Content preview from Practical Network Automation - Second Edition
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Autonomous System Number (ASN) in BGP
While working with the BGP routing protocol , a network engineer often faces a challenge to identify the ASN of a given public IP or hostname or DNS name. Let's see a sample code that we can use to fetch the details for any IP address.
We'll use the cymruwhois Python library for this purpose.
The code is as follows:
import socketdef getfromhostname(hostname): print ("AS info for hostname :"+hostname) ip = socket.gethostbyname(hostname) from cymruwhois import Client c=Client() r=c.lookup(ip) print (r.asn) print (r.owner)def getfromip(ip): print ("AS info for IP : "+ip) from cymruwhois import Client c=Client() r=c.lookup(ip) print (r.asn) print (r.owner)getfromhostname("microsoft.com")getfromip("216.58.192.14") ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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