Welcome to the Cisco Community Ask Me Anything conversation. Submit your questions from Monday, February 2, 2026, through Friday, February 20, 2026. Our colleagues Amruta Navadagi, Anaya Kalawat, and Mohammad Mehtabuddin will be waiting to assist you...
Hello everyone,For a scenario like the diagram uploaded, what is the cisco solution to symmetrically load balance traffic between servers and the switches work in active-active HA mode?I have used nexus 9k switches.I used vPC but it sends same flows ...
HiI have 2 Cisco Nexus N9K-C9396PX switches that I need to upgrade. If I login to Support portal and go to Downloads I can't find that model at all. If I check with the release notes for NXOS.9.3(10) that model listed as supported hardware, but if ...
PXE boot (WDS) stopped working after we upgraded MS switches to 18.1.9.The PXE client downloads the NBP, then hangs at "Contacting server" (0x102).- Same PXE failure on 3 different MS210 stacks in 3 different networks, all on 18.1.9.- Downgrading one...
I want to limit the bandwidth for specific traffic from a server on the Catalyst 9000.Is the following policing configuration correct?I want to control the bandwidth on the inbound direction of the interface connected to the server.Also, am I correct...
Hello there,A while ago, we wanted to update all our switches to a more recent firmware version (17.9.5) with Catalyst Center. While doing that, we encountered an issue, on a few stacks, where a switch of those stacks wouldn't have enough space on it...
Hi,I performed an ISSU upgrade on the Catalyst 9500-40X switches from IOS-XE 17.15.6 to 17.18.4. During the upgrade, I observed traffic interruption and ping drops for approximately 15–20 seconds, despite NSF and SSO being enabled.Is this expected be...
I bought a Cisco Catalyst switch from a hamfest (amateur radio swap meet) and am trying to get it working. I am a retired software engineer and am just looking to get this working. I can connect to it through a serial conection and can run some ini...
I'm really confused about software and hardware cef. Here is an extract from the study material from cisco "A router with Cisco Express Forwarding enabled uses information from tables that are built by the CPU, such as the routing table and the ARP t...
Hi Folks,Problem here. We have building management systems (temparature guages etc) with devices on one subnet and I suspect they are not connecting to their server correctly.I think they use broadcast and unfortunately the server is on another subne...
Situation:endpoint on 10.3.0.5 is ARPing for endpoint on 10.22.0.222. 10.3.0.5 encapsulates it w/ target L2VNI in configured G. Frame reaches to spine & gets no forwarding to another local-site leaf. Intersite on IR works perfectly. As well there are...
i have a 3850 stack of 2 switches in my mdf. i have another switch in my idf connected by fiber. everything has been good for years. i just added another 3850 switch into my stack in my mdf. now i cant access by idf switch at all. cant ping or p...
Hi ,We have SGT capable devices such as Meraki MR , Meraki MX , and Access switches. However , our core ( Arista ) is not SGT capable ( haven't tested but doesn't look capable ).I have read some blogs and articles about SXP but I'm fairly new to all ...
I am looking for a feature/command on Nexus 9K device. The requirement is to drop mcast packets on trunk ports on a certain vlan but only on certain trunk ports. For example Port 1 and 2 is a trunk port each carrying vlan 100 and 200. I want to blo...
Hi ,We would like to confirm the maximum supported number of copper RJ-45 SFP transceivers on the Cisco Catalyst C9550-48L4CD.For GLC-TE (1G RJ-45), what is the maximum number of transceivers that can be installed simultaneously?For SFP-10G-T-X (10G ...
Hi guys,I'm running a Cisco WS-C3850-12X48U, I've just tried to add a C3850-NM-8-10G module (previously blank) to it but it seems it's not detected rejected.Nothing in console when adding/removing the module, links aren't going up.How to be sure the ...
