Network engineer demand

[Chin Chang]

Hi, I have a demand but not know what software similarly.
Motive: sometimes even often, although the engineer can show commands to get info at customer site.
However, we cann't produce (full) topology soon if topology of customer site is large. Fast to know network environment.

So I have idea. Example I have file of txt that 「show run」, 「show ip interface brief」 and so on.
I import these txt files in some software / App, it can produce topology soon. To help me that fast know who(device) connected to whom.
if support many venders(Cisco, Juniper, F5 and so on), is better!

Regards.

[balaji.bandi]

There are many API and Software available in the market, Dr Google can help you.

[Dennis Mink]

So what is your question exactly?

[Chin Chang]

Excuse me. I'm Taiwanese so my English is not good.
The engineer may has not topology of customer site(if large). And the user doesn't know self network environment.
And that is disable CDP / LLDP.

Example, there are 2 txt files
[R1.txt]
R1#sh run int g1/0
Building configuration...

Current configuration : 85 bytes
!
interface GigabitEthernet1/0
ip address 12.0.0.1 255.0.0.0
negotiation auto
end

[R2.txt]
Building configuration...

Current configuration : 85 bytes
!
interface GigabitEthernet1/0
ip address 12.0.0.2 255.0.0.0
negotiation auto
end

And then, I import 2 txt files to some software. it can draw R1 g1/0 connted to R2 g1/0.
Hope my presentation is exactly.

[DM32830067]

Hi Tzu-Chien Chang,

So, basically, if you want to create a Physical Topology based on the configuration.

If you have Cisco Switches and Routers, in the same network- LAN then based on that there is a command

Show cdp neighbours

Show cdp neighbours detail

show  cdp entry.

Because, CDP runs on layer 2.

You can make a Topplogy based on that interface directly connnected w/ each other devices.

HTH,

DM

[Chin Chang]

Dear DM32830067,
Thanks for your suggestion.

Please let me ask another question. Have other resolution if customer devices are disable CDP & LLDP?
Because CDP maybe cause some pseudomorphs. I know 2 situations.
=============Situation 1
R1 ---> hub (many ports)---> Cisco devices

Example:
R1#show cdp neighbors
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone,
D - Remote, C - CVTA, M - Two-port Mac Relay

Device ID Local Intrfce Holdtme Capability Platform Port ID
R2 Gig 1/0 146 R 7206VXR Gig 1/0
R3 Gig 1/0 170 R 7206VXR Gig 1/0
R1#

The hub was like transparent device.

=============Situation 2
Cisco device ---> non-Cisco device(s)---> Cisco device(s)
The infomation of show cdp nei that will 2 possibilities.
The one like situation 1, and the other is empty of show cdp nei(Because non-Cisco devices can not distinguish Cisco frames / signals).
Summary, the customer required disable any neighbor protocols. I know its trouble.

Regards.

[DM32830067]

Hi Tzu-Chien Chang,
So, what's your question exactly, can you please enlighten with somewhat more/detailed information excluding personal details. So, I can help you.

Otherwise, you can use Network Monitoring Tools like Solarwinds/PRTG Monitor etc. So, using probes, you can fetch all MIBs and Objects, which might be helpful what devices are connected w/ each other and probably it may help you to draw a Topology based on that information of connected devices.
Thanks,
DM