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...
I am trying to troubleshoot/investigate this issue and it does not seem to be making any sense to me.I have a Nexus C9300-48U version (Version 17.9.2r CAT9K_IOSXE). The switch is configured to talk to 3 Cisco ISE PSN nodes, node1, node2, and node3 (...
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...
hi all,is there a command to run to detect if i have duplicate ips on a vlanthanks,rob
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 need some rack ears for an SG300-28PPCan anyone please tell me the part number, and where in the UK I can get these rom? Note, these are NOT the same across all the SG range.... I've already been there!TIA
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 ...
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 have a C9500-48Y4C IOS XE 17.12.4 that is notifying of a lot of MAC flapping. This is the typical error log. Oct 27 13:14:41.253: %SW_MATM-4-MACFLAP_NOTIF: Host 0050.56b1.96a0 in vlan 412 is flapping between port Twe1/0/3 and port Po1When the switc...
We are having a very difficult time with our Cisco C9200L-48P-4X and C9300L-48P-4X switches after converting them to be managed through the Meraki Dashboard.Initially, everything works fine, but after some time we start experiencing a number of issue...
We have remote office with 5 MS130-48PSW01 which we can call the "core" Layer 2 only has crashed 3 times over the last two weeks, where it reports offline in the dashboard and stops passing traffic.To bring the network back up we have to pull the po...
Hey!Cisco Catalyst 9300 L2 guide explicitly states that the command ptp mode:"Specifies the synchronization clock mode: - boundary: to enable the switch to participate in selecting the best master clock. If no better clocks are detected, the switch b...
i have essential license of cisco 9500L switch but i am unable to create stack wise virtual to create stack wise virtual i enable #license boot level network-advantage addon DNA-advantage command, now stack wise virtual is working but could be pleas ...
I have a stack of 4 C9200L-48P-4X switches running 17.09.05 cat9_lite_iosxe which I cant upgrade.I tried copying the 17.18.04 to flash: but cant install due to insufficient memory.Now I put a usb drive in the switch and ran: install add file ...activ...
Dear everyone,I have issue with nexus switch 93180yc-fx3 high speed 100%, it running firmware NX OS with 10.6.2F version.Anyone have issue same to me, and how to fix this issue?Thank you so much.
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...
