Switching

Hello everyone!I am studying enterprise network design and working on a diploma project based on Cisco's three-layer hierarchical network architecture.I would like to understand how network engineers decide which types of network devices are needed i...

I don't fully understand how the following configuration works—will QoS be controlled correctly?The service policy applied to the interface is TRAFFIC_PRIORITY, but the MARK_QOSGROUP in the policy map is not applied to any interface.In terms of how t...

Hello everyone!I am studying enterprise network design and working on a diploma project based on Cisco's three-layer architecture.I would like to understand why Layer 3 switches are commonly used at the distribution layer instead of routers.Both devi...

I am reaching out regarding a discrepancy I've observed between two API endpoints: 1. getNetworkClientsApplicationUsage: https://developer.cisco.com/meraki/api-v1/get-network-clients-application-usage/2. getNetworkClientsBandwidthUsageHistory: https:...

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 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 ...

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 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...

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...

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...

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...

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...