Properly hiya everybody, it’s been a minute (or many) since my final weblog submit, however I’m excited to say that the key undertaking I’ve been engaged on for the final 18+ months has come to a conclusion (properly, for me at the least 😉 ) and I’m wanting ahead to investing extra time in blogs, movies, and getting again on the market.
I’ve a number of subjects I’m seeking to dive into, however getting back from Cisco Reside in Vegas final week, I figured I would as properly bounce on the AI hype practice, chugga chugga chugga, and share a little bit of my very own ideas on the subject.
Let me begin by saying that I’m simply starting to essentially dip my toe into the AI pool. There are lots of different engineers already means out within the deep finish, and I hope to swim out and be part of them quickly.
Cisco Reside 2024 in Vegas was simply the compelling occasion I wanted to step down on step one (to maintain up the metaphor), and I included AI in two of my talks throughout the week. There was be a Community Engineer in an Synthetic Age within the Cisco U. Theater, an replace to my speak, “ be a Community Engineer in a Programmable Age,” that I first delivered at Cisco Reside in 2017. After eight years, it felt somewhat bittersweet to depart the programmable age behind, however thrilling to be getting into a brand new age. Synthetic Intelligence additionally made a last-minute “bonus” look in my breakout “Programmability Abilities for Engineers Who Don’t Wish to Code.”
For these talks, I spent a while pondering by way of how community engineers needs to be enthusiastic about and utilizing AI proper now, and what to presumably count on for the long run. I’m not going to undergo all the small print on this weblog submit, however somewhat, I need to focus in on one particular use case that I discovered stunning and a bit thrilling: Utilizing AI to look overview your work. Buckle in, and let’s test it out.
Bridget takes Hank to Community Engineering Faculty
One of many examples in “Programmability Abilities for Engineers Who Don’t Wish to Code” revolves round creating IPSEC VPN configurations for routers based mostly on a configuration template and spreadsheet of knowledge. I first present how you can use formulation inside the spreadsheet to create the configurations, and later use Ansible and Jinja2 templates to do the identical factor.
As I used to be rehearsing the session, I puzzled… Might AI do the identical work?
If I’m trustworthy, I figured it could get shut, however should be mounted/completed to be achieved. So I crafted this immediate and despatched it to Cisco’s ChatGPT implementation referred to as “BridgeIT”.
Utilizing the information from the beneath CSV information,
vpn_name,tunnel_interface,side_1_public_ip,source_network,source_mask,side_2_outside,tunnel_destination,destination_network,destination_mask,preshared_key
VPN_101,GigabitEthernet0/1,203.0.113.101,10.98.128.0,0.0.3.255,GigabitEthernet1/1,198.51.100.33,172.28.11.0,0.0.0.255,ZA788I
VPN_102,GigabitEthernet0/1,203.0.113.102,10.98.128.0,0.0.3.255,GigabitEthernet1/1,198.51.100.34,172.28.12.0,0.0.0.255,AM285I
generate a configuration from every row based mostly on the beneath jinja2 template
! VPN {{ vpn_name }}
crypto isakmp coverage 10
encryption aes
hash sha256
authentication pre-share
group 14
crypto ipsec transform-set vpn_transform esp-aes esp-sha256-hmac
access-list 100 allow ip {{ source_network }} {{ source_mask }} {{ destination_network }} {{ destination_mask }}
crypto isakmp key {{ preshared_key }} handle {{ tunnel_destination }}
crypto map {{ vpn_name }} 10 ipsec-isakmp
set peer {{ tunnel_destination }}
set transform-setvpn_transform
match handle 100
interface {{ tunnel_interface }}
crypto map {{ vpn_name }}
I despatched it away and waited… and waited… and waited. However then this reply got here again:
Primarily based on the supplied Jinja2 template and the CSV information, listed here are the generated configurations for every VPN:
For VPN_101:
! VPN VPN_101
crypto isakmp coverage 10
encryption aes
hash sha256
authentication pre-share
group 14
crypto ipsec transform-set vpn_transform esp-aes esp-sha256-hmac
access-list 100 allow ip 10.98.128.0 0.0.3.255 172.28.11.0 0.0.0.255
crypto isakmp key ZA788I handle 198.51.100.33
crypto map VPN_101 10 ipsec-isakmp
set peer 198.51.100.33
set transform-set vpn_transform
match handle 100
interface GigabitEthernet0/1
crypto map VPN_101
For VPN_102:
! VPN VPN_102
crypto isakmp coverage 10
encryption aes
hash sha256
authentication pre-share
group 14
crypto ipsec transform-set vpn_transform esp-aes esp-sha256-hmac
access-list 100 allow ip 10.98.128.0 0.0.3.255 172.28.12.0 0.0.0.255
crypto isakmp key AM285I handle 198.51.100.34
crypto map VPN_102 10 ipsec-isakmp
set peer 198.51.100.34
set transform-set vpn_transform
match handle 100
interface GigabitEthernet0/1
crypto map VPN_102
I used to be duly impressed. Bridget (as BridgeIT is affectionately referred to as) understood precisely what I wished and was in a position to create the configurations for me completely. Rating one for our artificially clever robotic overlords.
However wait… she wasn’t achieved. The message continued:
Please notice that there’s a typo within the Jinja2 template, particularly within the line the place it says:
set transform-setvpn_transform
There needs to be an area earlier than “vpn_transform”. Right here’s the corrected line that ought to seem within the template:
set transform-set vpn_transformOh man… I had a typo in my template? Inconceivable!!! I shortly went and checked my immediate and the supply Jinja2 template that I copied for the immediate—a template I’ve utilized in my Ansible demo on this presentation for 2 years.
Certain sufficient, I had a typo. Whoops… boy, did I really feel embarrassed. And in case you return and take a look at the configurations that Bridget supplied to my immediate, you’ll see that she really mounted the error and despatched the right configs. Very, very properly achieved. Rating two and three.
However she nonetheless wasn’t achieved…
Moreover, you would possibly face a problem when making use of two completely different crypto maps to the identical interface. Normally, a bodily interface solely helps one crypto map. If you might want to assist a number of VPNs on the identical interface, you’ll sometimes use the identical crypto map identify with completely different sequence numbers for every peer.
Right here’s how one can modify the second crypto map to make use of the identical crypto map identify with a distinct sequence quantity (assuming you need to use the crypto map identify VPN_MAP for each):
For VPN_102 (with a revised crypto map identify and sequence quantity):
! VPN VPN_102
crypto isakmp coverage 10
encryption aes
hash sha256
authentication pre-share
group 14
crypto ipsec transform-set vpn_transform esp-aes esp-sha256-hmac
access-list 102 allow ip 10.98.128.0 0.0.3.255 172.28.12.0 0.0.0.255
crypto isakmp key AM285I handle 198.51.100.34
crypto map VPN_MAP 20 ipsec-isakmp
set peer 198.51.100.34
set transform-set vpn_transform
match handle 102
interface GigabitEthernet0/1
crypto map VPN_MAPDiscover that the entry record quantity for VPN_102 has been modified to 102 to keep away from battle with the entry record for VPN_101. The crypto map sequence quantity for VPN_102 has been set to twenty, differentiating it from the sequence quantity 10 used for VPN_101. If you happen to comply with this strategy, guarantee that all of your VPNs use the identical crypto map identify (VPN_MAP on this case) with completely different sequence numbers.
Okay… this exhibits some severe community understanding. Combining a CSV file and a Jinja2 template collectively isn’t that removed from the code help and co-pilot use circumstances which were in place for awhile—not likely that a lot of a stretch. And discovering a typo in a configuration template that’s most likely current in a whole bunch of public Web documentation, weblog posts, and coaching examples? Additionally not likely that stunning.
However making this closing leap associated to community structure and design… this was actually fairly stunning. I didn’t inform Bridget that every of those configurations can be deployed on particular person routers, so she moderately “apprehensive” that I used to be seeking to deploy the configs on the identical machine. And if I did that, it WOULD be a problem. Her steered resolution is cheap, although admittedly follows examples which might be additionally properly documented on the Web.
So what does this imply for us community engineers?
I used to be discussing this instance throughout Cisco Reside with some attendees, and the analogy of a “peer overview” was introduced up. This was a use case for AI in community engineering that I hadn’t formalized in my head but, however had been dancing round with different examples.
There’s a very actual threat of engineers utilizing AI-generated configurations “as is” of their community. It is a unhealthy thought for a similar purpose as copying and pasting code from Stackoverflow or one other untrusted Web supply. Earlier than utilizing configurations generated by Bridget or one other generative AI device, it’s crucial to confirm the accuracy. In any other case, you threat changing into one other sufferer to hallucinations or simply inaccuracies from overconfident AI assistants.
Nonetheless, I feel there’s actual potential in utilizing AI as a peer reviewer for configurations and different artifacts we create. Right here, WE, the community engineer, use our data, expertise, and expertise to construct an answer. Then, we ask AI to have a look and supply some suggestions, much like sending it to a co-worker, companion, or Cisco TAC.
This second-set-of-eyes use case is one which I feel engineers ought to think about attempting out for themselves—with a few essential caveats:
- Verify along with your firm and group’s AI insurance policies. Lots of the publicly obtainable AI instruments take any immediate data despatched to them and use it for future coaching and fine-tuning. Community configurations are thought-about confidential for a lot of corporations as there’s a severe safety threat in sharing them publicly.
- I’d nonetheless advocate having one other “natural intelligence” overview any crucial configurations. I’m excited by the potential of AI, and we seemingly will get to a degree the place AI is so correct we will depend on it for a lot of use circumstances, however let’s take the sluggish strategy to get there.
Properly, what are your ideas on this use of AI for community engineering? What different use circumstances are you exploring in your each day work as an engineer? Let me know within the feedback. And keep tuned for extra from me as I proceed to swim into the Synthetic Age!
PS… This weblog submit was written by me, Hank Preston, and never by Bridget or one other AI device 🙂
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