Switching

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,I was configuring from scratch a C9500-24Y stackwise setup. It worked; we powered it off (not yet time for the production move).At one point we powered it on, to check something. I work remote so I have helping hands locally. For some reason i was...

Switches - MS software versions MS 18.1.8.1 changelogImportant alertsMS130-24(P) switches will reboot twice during the upgrade process when transitioning to MS 18.1.8 (or later) from MS 18.1.7 or earlier. This behaviour is expected, and is not indica...

Hi everyone. I manage a small office network built around a single Catalyst 9300 switch, and I want to segment traffic into separate VLANs for staff workstations, guest Wi-Fi, and printers. What is the recommended way to configure trunk ports toward ...

Hi,I was not able to ssh into a switch, the consoled in and found out all vty sessions filled out with idle sessions thats why i was rejected to ssh. question is why switch did not end those sessions and exec-timeout did not work?! see details in the...

CISCO C9500 32C has no uplink ports, so is the case like it cannot be used in access or Distribution layer? Also, Is it necessary that   Uplink ports must be always SFP ports? ( Since we have to use fibre optic cable for uplinking)  

Hey all,Can i configure two port of a same switch for redundancy of ISP which is 9300 L3 switchi am having two isp and also two L3 switch but both of them is need to be connected in stack and also i need to configure HA for Both these ISP is there an...

Hi,few month ago 17.15.5 turned to be the recommended IOS-XE version and now with these vulnaibility there should be an upgrade from it. what do you recommend and advise? 17.18.4, 17.15.6 or anything ?https://sec.cloudapps.cisco.com/security/center/c...

I had to perform a factory reset and upgraded switch to latest version - 15.2(7)E14 - but the web GUI header displays: {{productOwner}} {{platform}} {{deviceDescription}}{{version}}I'm not sure if there is a fix. I've tried modifying the headerCtrl.j...

I don't want to steal anybodies time... Just found - after 15 years using those devices in depth, teaching several QoS-Classes - nobody noticed that, really?"60 - 64" - ... DSCP 64? So beautiful!https://www.cisco.com/c/en/us/td/docs/switches/lan/cata...

Hello Everyone,Can someone please provide the CISCO-issued certificate confirming the availability of technical support and spare parts for the following CISCO items for a minimum period of ten 10 years. C9300-24T-AC9300-NM-8XGLC-ZX-SMGLC-EZX-SM-100 

I am troubleshooting a Cisco switch where users occasionally experience packet loss, but the interface error counters look normal.When the usual interface checks don’t show anything obvious, what do you normally investigate next? Do you focus on STP ...

Important alertsMS130-24(P) switches will reboot twice during the upgrade process when transitioning to MS 18.1.8 (or later) from MS 18.1.7 or earlier. This behavior is expected, and is not indicative of a problem.New feature highlightsGroup Policy A...

Hello,We recently introduced a peering solution in our HIVE CDN environment for video streaming, and we observed a major CPU issue across our campus switching infrastructure.Our topology is as follows:Two Catalyst 9500 switches configured as StackWis...

We recently upgraded our switches and have started seeing issues with BPDU delays and consequential loop guard activations on switches. This is not impacting switches connected directly to our core, but only switches that are downstream of other Mera...