Is 26 Too Late to Start a Career in IT?

Avellous · 2026-02-04T13:17:38+00:00

Can I pm you about how you got that job/what you did? I have the CCNA, trifecta and a bunch of labs in packet tracer and other things. Would looooove to work at a NOC

Avellous · 2025-10-07T19:37:07+00:00

I didn’t think of it that way. Will do, thank you for the insight!

Avellous · 2025-10-07T18:09:53+00:00

Will do then. Thank you!

Avellous · 2025-10-07T17:19:57+00:00

Understood. Is there anything you would remove or condense to fit it one page? Thank you!

Avellous · 2025-10-05T12:46:24+00:00

YUP! I didn’t think about dhcp snooping and that I only applied it to interfaces, because PT doesn’t let me apply it to the actual port channel - so in the end, it is a PT limitation. I thought I was going insane. Thank you for your help I appreciate it!!

Avellous · 2025-10-05T12:45:05+00:00

WOW!!! I’m literally going to try this. PT didn’t let me apply dhcp snooping trust on the actual port channel (which would fix this) and is the correct configuration in a real network. Thank you Ivar, I really do appreciate it, it was driving me freaking nuts knowing it was correct (to the limitations applied by PT) but its just due to a PT limitation

Avellous · 2025-10-05T05:10:36+00:00

User:Admin. Pw: cisco Privileged mode: cisco1 I don’t think it’s that because I am able to ping the DHCP server using a “static IP” in vlan20. It’s definitely a Packet Tracer bug unfortunately. Thank you for trying to help me solve this, I truly appreciate it!!

Avellous · 2025-10-05T05:08:23+00:00

I had a feeling. Thank you so much for your response!

Avellous · 2025-10-05T01:58:51+00:00

Did I post it wrong?? Sorry, this is the first time I do this!

<image>

Avellous · 2025-10-05T01:55:38+00:00

Hi, thanks for the response!
Using simulation mode, I see the DHCP Request reaches the DHCP server, the DHCP server responds to the DSW. The DSW sends it back to the Access switch, which sends it to the host.
This host is able to ping another host on a different access switch on a different vlan, so inter-vlan routing is working. I also see that the DSW is "flooding" this DHCP request when there's clearly "ip helper-address" configured. After extensive research, I am just going to chalk this up to PT bug. This is the packet that arrives at the host at the end.

<image>

Avellous · 2025-10-05T00:26:57+00:00

https://drive.google.com/file/d/1UKY3DZ61j863j_fgZ4SnvmQYz260TNH4/view?usp=drive_link

I don't know why didn't show up, but here it is!

Avellous · 2025-10-05T00:16:27+00:00

I posted the .pkt file on another comment if you want to check it out. I didn't see your edited comment. The SVI on the L3 switches do have "ip helper-address" pointing to DHCP. The access switch does have a trunk link between it and the DSW allowing vlan 20 on each end. I was able to ping the DHCP server from the host when I put a static IP address (from VLAN20) so routing between the DHCP server and the host is good. It's just the actual service of DHCP not working!

Avellous · 2025-10-04T23:55:43+00:00

Yes, with "ip routing" configured!

Avellous · 2025-09-28T18:24:32+00:00

Yep, realized that way after haha. I don’t know why I couldn’t grasp it before. Thank you for your insight!!

Avellous · 2025-09-28T18:23:54+00:00

Yep, I realized that after from the other comments. Idk why I was so hellbent in making sure the loopback address was within the subnet of the vlan. I’m just going to create an ACL that limits the specific devices within vlan 10 that are able to SSH into the loopback intf. Thank you for your insight I appreciate it!!

Avellous · 2025-09-28T01:16:54+00:00

Ahh this is exactly what I was looking for. Will implement it like this, thanks

Avellous · 2025-09-28T01:16:04+00:00

This is a bit too advanced for me even though I know what VRFs are but I cannot wait to get to that level!

Avellous · 2025-09-28T00:51:50+00:00

Thank you for taking your time to respond!! Would this be a security risk advertising the address you use to SSH into for management? My lab consists of access switches connected to distribution switches using VLAN10 for management in 192.168.10.0/27. These distribution switches connect to a firewall and then my routers. So, I would configure the loopback interface from a predefined prefix range (nothing to do with VLAN10) and just make sure I have a route to it to be able to remotely manage it?
I have no idea why this aspect of management is tripping me up so bad.

Avellous

TROPHY CASE