Cisco Catalyst Center
This community is for technical, feature, configuration and deployment questions. For production dep...
2998 PostsActivity in Networking
IPTV multicast from ISP VLAN to default VLAN
Hello everyone,I’m working on an IPTV + Internet integration project for a hotel network, and I'm stuck on enabling multicast forwarding between an IPTV VLAN delivered by the ISP and my internal LAN VLAN.I would highly appreciate any guidance or clar...
GUI interface on WLC
I am trying to connect to GUI interface of WLC but it is continuously showing "Server Reset Connection". I configured the management interface of WLC with an IP 192.168.10.10 and PC connecting with the WLC with an IP 192.168.10.11. The PC and WLC are...
Resolved! I have a 3850 24pt poe switch and cannot factory default
I tried by plugging in and holding down the mode button, syst just keeps flashing green for over 10 mins. is there another way to do this? I changed isp's and the ip address changed from 192.168.1.1 to 192.168.0.1, so I need to reconfigure the switch...
Native vlan mismatch
I have two switches A and B connected via a trunk. Switch A has no native vlan configured and switch B has native vlan 16; so the second switch b is nownot reachableCan I configure native vlan on switch A and then when switch B is reachable, remove t...
IOS-XR ZTP expected behavior
I'm working through getting IOS-XR devices to ZTP.I'm using DHCP Option 67 to pass the URL for a ztp python script.The DHCP offer also includes DNS server options.It seems that if the URL uses FQDN in the URL, the ZTP script will not be downloaded.On...
Intermediate Port Shutoff
My inside trunked router port randomly shuts, with no indication of why in the logs. I had debug STP. What's another debug I can enable to try and get an idea why?Router Log Dec 3 2025 01:26:37 UTC: %TRACK-6-STATE: 22 interface Gi0/0/1.2 ip routing U...
Week 8: Collapsed Core - Lab
This week, we’re exploring the Collapsed Core design! A simple, efficient foundation for real-world networks. Perfect for those just starting their networking journey!Inside:Lab topologyTasks to completeThis weekend, I’ll post a full step-by-step vid...
MAC addresses starting 00.30.3a and 00.34.ba
Hi, Has anyone else seen the following MAC addresses show up on numerous ports recently: 0034.ba00.4000 0034ba01.4000 0030.3a00.4000 0030.3a01.4000 These have just started to show up on several user ports *same 4 MAC's on all interfaces effected* in ...
Synthetic Traffic: Choosing the right functions for real insights
You’ve probably heard the term synthetic traffic tossed around in conversations about network visibility. It sounds fancy, but the idea is simple: You’re sending controlled test traffic through your network to measure how things behave before users s...
Connect Nexus N3K-C3172PQ-10GE <-> WS-C2960X-24TD-L: no rx, link up
Hello community,i have a problem with connecting a Catalyst 2960x with 2x 10G SFP+ to a Nexus C3172.The link comes up on both sides, but on the Catalyst side there is only TX, i am not receiving packets from the Nexus, the counter shows zero.Luckily ...
Cisco C1300 switch: “You cannot use SSH session from another SSH sessi
Hello all,I’m using two Cisco C1300 series switches I can SSH from my core router to each C1300 without any issues.However, when I SSH into a C1300 switch, and from there try to SSH to another device (e.g. core router or the second C1300), I get the ...
Discard rate for interface is....... threshold value for this is....
Dear Expert, My NMS showing Discard rate for interface gig 1/0/2 is 9%, threshold is 5% and this generates a huge alarms in the system. I want to increase the discard rate to 10% to reduce the alarms but need to understand the calculation or formul...
Resolved! DHCP Special Configuration
I need some help guys! So we are tasked to figure out DHCP as a school work, and the first part is the DHCP standard. So here comes the next part, as you can see in Networks 1 and 2, they are connected and have DHCP service at Server 1. So the task t...
Hub & Spoke OSPF Design Best practice
Hello Expert,I’m seeking best-practice guidance for an OSPF hub-and-spoke design and would appreciate feedback on my proposed Area placement.Network summarySites: 5 (1 HQ hub + 4 remote spokes)Requirement: Spokes must only communicate with the Hub; n...
C9300/9500/9600 IOSXE 17.15.4b release notes
Is any able to access the release notes of C9300/9500/9600 IOSXE 17.15.4b? Looks like the URL on Cisco site is pointing to 9800 WLC. Thanks
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