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Chad Sawyer

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RE: Best DHCP Lease duration Practice for Small-Medium CANs?

Posted By Chad Sawyer 02-23-2024 07:56:20 AM
Found In Egroup: Network Management \ view thread
We run 15 minute leases for all wireless client networks across campus. The associations are usually pretty short before they move on to another region of campus or head home for the day, so our philosophy was to run short leases since they weren't using them for very long anyways. Chad Sawyer ...

RE: Cisco 9800-80 and WNCD CPU 99% utilization - Client connectivity issues

Posted By Chad Sawyer 08-10-2023 08:06:52 PM
Found In Egroup: Wireless Local Area Networking \ view thread
Gotta love the "console into the AP and do x" workarounds. Every problem in large environments is a problem at scale.

RE: Cisco 9800-80 and WNCD CPU 99% utilization - Client connectivity issues

Posted By Chad Sawyer 08-08-2023 06:39:39 AM
Found In Egroup: Wireless Local Area Networking \ view thread
Hey Tariq, we saw your issue as well when our students returned to campus for fall semester of 2021. WNCD utilization was at its worse when students were moving around between classes. We used to have our site tags configured as groupings of buildings, but some of the site tags were too busy so we broke ...

RE: SSIDs and IoT support

Posted By Chad Sawyer 08-03-2023 01:08:19 PM
Found In Egroup: Wireless Local Area Networking \ view thread
Question for Dan- do you captive portal that open SSID and require folks to authenticate and register in some way? Like Eric, our Security folks also want to be able to tie usernames to devices as much as possible. An open network with no captive portal would be Wi-Fi on easy street. I don't think ...

RE: Issue with Intermittent Wireless with WLC 9800

Posted By Chad Sawyer 02-24-2023 06:54:35 AM
Found In Egroup: Wireless Local Area Networking \ view thread
Kamilah, were you guys able to nail this one down? Just curious of what the root cause was. Hope you guys are in a better place now. Thanks ------------------------------ ChadSawyerUniversity of South FloridaNetwork Engineerchadsawyer@usf.edu ------------------------------

RE: Issue with Intermittent Wireless with WLC 9800

Posted By Chad Sawyer 02-15-2023 08:04:34 AM
Found In Egroup: Wireless Local Area Networking \ view thread
How many APs do you have in each site tag? A lot of the Cisco pages guide for not exceeding 500 APs in a site tag. We tried that but still saw poor performance during peak times. We've had better results making a site tag for each building. Check your WNCD process usage during times when you're getting ...

RE: Storing UPS Batteries

Posted By Chad Sawyer 01-13-2023 09:26:58 AM
Found In Egroup: Network Management \ view thread
We've tried to standardize on as few UPS models as possible. APC SMX2000s and SMX3000s use the same RBCs. We go through them fast enough that we don't have them go bad on the shelf as often as when we were stocking spares to maintain a lot of different models. The only annoyance is that older buildings ...

RE: CSCwd80290 - IOS APs unable to join WLC after code upgrade

Posted By Chad Sawyer 12-13-2022 04:50:30 PM
Found In Egroup: Wireless Local Area Networking \ view thread
Not sure if there's a group. I'm clueless on Twitter though. This is who posted it back on 12/6: https://twitter.com/darchisnicolas/

RE: CSCwd80290 - IOS APs unable to join WLC after code upgrade

Posted By Chad Sawyer 12-13-2022 04:39:44 PM
Found In Egroup: Wireless Local Area Networking \ view thread
We were up against the same dilemma you described Jesse. Our main motivation for wanting to move to 17.3.6 was so we could deploy the shelves of 9120s with hardware version 07 that we have sitting around. For what it's worth, we upgraded one of our 9800-80 HA pairs from 17.3.5b to 17.3.6 with APSP2 ...

CSCwd80290 - IOS APs unable to join WLC after code upgrade

Posted By Chad Sawyer 12-06-2022 06:18:00 PM
Found In Egroup: Wireless Local Area Networking \ view thread
Just sending this out in case anyone else is planning WLC code upgrades with the end of fall semester. It's a nasty one that one of our guys luckily noticed on Twitter. We confirmed with a contact in the BU that environments with 1700/2700/3700 APs should hold off on upgrades. It sounds like 1800/2800/3800/91xx ...

RE: Cisco 9800-80 Experiencing Load Issues

Posted By Chad Sawyer 09-14-2022 09:28:18 AM
Found In Egroup: Wireless Local Area Networking \ view thread
That's interesting. We have mDNS set to gateway mode for our WLANs right now. Regarding the part you mentioned about putting guardrails on mDNS announcements, was that this screen under Configure -> Services -> mDNS -> Service Policy

RE: Cisco 9800-80 Experiencing Load Issues

Posted By Chad Sawyer 09-14-2022 08:21:34 AM
Found In Egroup: Wireless Local Area Networking \ view thread
Hey Ray, Looks like we're in good company. Our issue at USF is identical to what's described in CSCwc96782. We have two pairs of 9800-80s in HA, on 17.3.5b code. We have ~3100 APs on one of our 9800-80 pairs and around 20k clients during peak hours. During peak times we see the same symptoms. At first, ...

philosophy toward switch code upgrades

Posted By Chad Sawyer 04-27-2022 08:54:21 AM
Found In Egroup: Network Management \ view thread
Good morning, What are your approaches for managing software versions on your switches? Are code upgrades done routinely, or is it typically to take advantage of bug fixes for stability or security issues? Thanks folks Chad Sawyer Network Engineer USF Information Technology www.usf.edu/it ...

RE: Firewall Change Request Form

Posted By Chad Sawyer 02-09-2022 06:50:22 AM
Found In Egroup: Network Management \ view thread
Most of our requests are from within IT as well, with a few requests occasionally from outside groups. We actually have pretty good results with the fields being filled out correctly. Our Jira folks set it up so that the ticket lands in our IT Security group's queue first for approval before it comes ...

RE: Firewall Change Request Form

Posted By Chad Sawyer 02-08-2022 11:57:33 AM
Found In Egroup: Network Management \ view thread
We also use Jira Service Desk, here's what USF uses for an ACL request form: https://usfjira.atlassian.net/servicedesk/customer/portal/4/group/26/create/66

Network Architect position available at University of South Florida

Posted By Chad Sawyer 01-28-2022 06:51:03 AM
Found In Egroup: Wireless Local Area Networking \ view thread
The University of South Florida is hiring a Network Architect. I see you, top networking minds of the frozen North. Put down the ice scraper, gather 'round the fire, and dust off that resume. The land of no state income tax and flip flops during Christmas awaits. Follow the trail that Tom Brady blazed ...

RE: Ok. Who else is HATING the educause web forum? (cross posting)

Posted By Chad Sawyer 01-19-2022 02:49:58 PM
Found In Egroup: Wireless Local Area Networking \ view thread
Yeah I agree that we got more value out of the listserv. The community is less active now. The old WLAN threads would see 10+ responses a day. It's lonely these days.

Automatic Transfer Switches in access layer IDFs?

Posted By Chad Sawyer 11-05-2021 01:03:44 PM
Found In Egroup: Network Management \ view thread
Question for the group- Is anyone using automatic transfer switches in their IDFs? And if so how has your experience been? I'm just looking for ideas on how others are solving the problem of a UPS going braindead and taking an IDF down while utility power is perfectly fine. Thanks folks! -------- ...