About darinheilman

darinheilman · 06-30-2025

I'm looking for confirmation of my thinking being correct, or corrections where wrong. Here is my situation: Large School District with construction nearing completion of a new building where the core of our network will be moved. Right now we have...

darinheilman · 04-15-2025

High Level Overview of my network: Cisco 9400 at campus core, 9300s at four smaller branch schools. OSPF routing to our ISP who routes internal traffic directly to the correct building and external traffic to internet. All of these links are working ...

darinheilman · 09-26-2018

I have an operational mixed stack of three 2960s and i want to upgrade IOS. I tried using the archive download-SW command but got this error. Error: The image in the archive which would be used to upgradeError: system number 2 does not support tha...

darinheilman · 09-25-2018

I am banging my head against an issue that has been ongoing on my school network. Every day (or if i'm lucky...every other day) i am seeing a switch closet go down. Its not the same one each time, and its at random times. All the closets are in a ...

darinheilman · 07-03-2025

Spanning tree is MST so I'll make the new switch a low priority so it becomes root.However, I'm still wondering how the 9410 will get the VLAN Interface information (IP address and ACL assignment) that is housed on the 4510 if i simply make it a clie...

darinheilman · 04-15-2025

as a test device in my smallest school....yeah, just minimal. The only thing i want to initially use is ACL constructions and monitoring.

darinheilman · 09-03-2020

its not a point to point from our core 4510 to this 2960X. I will get a network diagram worked up for the connection. However, we have had this SAME issue for a different 2960X that IS point to point directly connected to the 4510 with a relatively ...

darinheilman · 09-02-2020

The problem is still happening and i always need to reboot. It's a supreme pain in the ass.....but no one has been able to help us....so we just reboot. I have tried different combinations of IOS images for both switches. The 2960X's are now on 15....

darinheilman · 10-10-2018

the weird thing is that the link doesn't really DROP.....it just stops passing traffic. Link light is on, sh interface (as you will see below) shows the link up. Doing a "shut"/"no shut" doesn't fix it from either end.....the only thing that brings...

Member Since	‎04-04-2018 10:17 AM
Date Last Visited	‎07-15-2025 02:26 AM
Posts	18

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Moving Core of the network to a new Switch

Firewall to replace VLANs on a switch?

Upgrading IOS in a 2960 mixed stack

Ten Gig Trunk Ports that stop passing traffic

Re: Moving Core of the network to a new Switch

Re: Firewall to replace VLANs on a switch?

Re: Ten Gig Trunk Ports that stop passing traffic

Re: Ten Gig Trunk Ports that stop passing traffic

Re: Ten Gig Trunk Ports that stop passing traffic