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...
Hi support community, we have a very strange phenomenon in our company campus network and we don't know how to deal with it.Maybe you have any idea? Our campus network consists of 3 core switches (2 C6880-X-LE in a VSS network) and several access swi...
Hi everyone,I've been trying to enable PVLAN on a Nexus 1Kv (5.2x) vethernet port-profile which is already configured as trunk, so I need this port to become "promiscuous trunk".Every config guide and post I found mentions that that prom. trunk is av...
Hi Guys,When I plug in my switch the system LED is blinking green and all the ports led lit up for a few seconds then the ports led goes off, and a few seconds after the system LED is off. The switch seems like its shutdown after. Any ideas why thi...
Hello,The 2 x 9500 series stack switches takes longer time to switchover around 2 minutes, anyway to reduce the failover/boot time for this switches?? Thanks
Hello all,I hope everyone is keeping well.We are looking at the Catalyst 9600 as Server farm switch, but was wondering if there any new models are to be announced? The reason for the query is we have around 160 ports in use (dual homed), and we would...
Hello All,We are currently looking to migrate 160+ servers from an EOL stacked switch, and looking at the following options:Catalyst 9600 with 25Gb line cardsNexus 9500 with 25Gb line cardsIf we deployed the Catalyst 9600 this could be managed by Cis...
I have a C9300-24T-E with v16.9.5. The only module installed is NM-4G. All the ports are 1Gbps. But in running configuration, there are a number of tengigabitethernet, twentyfivegigabitethernet and fortygigabitethernet ports.... why? A new feature?
Terminology Used: Switch - a physical unit; Stack - a logical unit made up of multiple switches NOTE: This bug only affects Catalyst 9300 in a stack (>14 weeks uptime). This bug DOES NOT affect stand-alone Catalyst 9300 switch. This bug DOES NOT ...
Hi All,I am seeing a lot of OSPF "Dead timer expired" and OSPF adjacency drop off for for R1 (see below).Physical topology.R1 (Cisco 7206) --> R2 (Cisco 7606)R1 = 203.17.101.xR2 = DR = 203.17.101.AIs there a way to narrow down what is causing this? M...
Hi,I'm working in a switching renewal project for a customer with Catalyst 9200. The idea is to configure two stacks, the first stack is already configured with three C9200L-48T switches. However, I was wondering if it's possible to add a C9200L-24P ...
Hello,We intend to use MACL to filter inbound traffic on SVI interfaces,my question is where would the mac-addresses for the MACL be stored? i hope not in the configuration because we have a large pool of mac addresses to use. Scenario: We use a GPO...
With Port security enabled, interface comes up, but cannot see a MAC on the interface, IP phones or systems don't get an IP address. May 29 07:18:57: %PARSER-5-CFGLOG_LOGGEDCMD: User:admin logged command:logging buffered 20480May 29 07:21:56: %PARSER...
Hi everyone, I've been scratching my head with this issue, thus reaching out for help. I have a 3560G running 2.2(58)SE2 and I want to configure dot1x. Here is the config: aaa new-modelaaa group server radius myradiusaaa group server tacacs+ mytac...
I am having trouble working out which 10gb modules will fit in a VS-S720-10G, we do have GBICs in them, but I am not in a position to validate what they are. All I can get from the switch is they are 10Gbase-SR. I need to use the spare TE ports to co...
I have a Windows Server 2016 DHCP setup on my first switch. The DHCP server has LAG setup on 2 ports with LACP enabled. The devices(pcs,laptops,printers) on the first switch all are able to get DHCP addresses from the server and are pingable. My 2...
