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,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...
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...
We are troubleshooting a recurring issue between a Cisco Catalyst 9407R and a Palo Alto PA-3410, and would like to know if anyone has seen the same behaviour.Environment- Switch: Catalyst 9407R stackwise virtual, IOS-XE 17.18.3, supervisor/line card-...
Hi, So I've bought a second hand Cisco SG350-28, however I just found out on the switch the reset button is broken off the mainboard, I'm wondering if there's any way to get a replacement or if there might be some tips about DIY'ing it.
Hey!The Cisco guideline "Troubleshoot MACsec on Catalyst 9000" recommends to increase the system MTU to accomodate for extra 32 bytes due to MACsec. However, on Catalyst 9300 I do not see any packet being drppped when using max packet size (macsec e...
Hi Guys, I have a network consisting of a L3 3560, 2960's and HP 2650's in a loop. When connecting a new machine up it can take quite a while to get an IP address, I understand this is due to the switch port 'listening' for 30 or so seconds? Is it po...
Hey!Assume this scenario. Switch A and switch B are linked by a trunk encrypted with MACsec. According to Cisco security guide "RSPAN or ERSPAN does not capture encrypted packets at egress and decrypted packets at ingress for MACsec enabled interface...
Hello,I have a question regarding bug CSCuz24063.Due to the impact of CSCuz24063, is it possible for the running configuration to be modified automatically when a member port experiences a link down/up event, such as when the cable is unplugged and p...
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...
As Attachment snap showing the scenario, i need a suggestion to get (http/https/pop3/smtp) access for the network(192.168.0.9) through the internet server(192.168.0.123) placed on the other side of my router(LDC_Sharaf Router). Basic routing is enab...
Title: C9200L 10G SR uplinks flap on stack member V05 (17.3.5 after downgrade from 17.18.03); same fiber/SFPs work on V02 member Environment- Two-member C9200L-48P-4X stack (StackWise-80, C9200L-STACK adapters), install mode. Member 1 = VID V05 (2025...
