Switching

Hello Cisco Community!Redundancy is great! Until it creates loops. That’s where Spanning Tree Protocol (STP) steps in!In this week’s session, I dive into how STP protects Layer 2 networks from broadcast storms, how the root bridge election process wo...

After Factory reset I install system from TFTP server.Now switch stuck in rommon after reebotPlatform C9300LPLATFORM_TYPE C9300L speed 9600Booting Recovery Image 16.12.1 Initiating Emergency Installation of bundle tftp:///cat9k_iosxe.17.18.01.SPA.bin...

I am trying to setup an IP HELPER-ADDRESS per SVI but clients are not getting IP address from the assigned DHCP Server in the IP HELPER Address.  C1300-24XT has also different syntax or argument in declaring IP HELPER-ADDRESS.Catalyst 1300 Series Man...

I am pretty sure I know the answer to this, but I am looking for a bit of guidance.  I have an industrial plant with many switches, they are currently using STP for their loop prevention protocol and we are recommending that they implement REP for fa...

I have pvlan trunk port facing router with some pvlans, primary and isolated vlans. I also have access (community) and trunks with isolated ports and this all works ok. Problem is that I need to have trunk port facing host that utilize normlal and co...

Hello,I'm looking for some direction on upgrading this platform, it is currently on IOS 12.2(35) SE5.Curious if this requires multiple upgrades and what version I should upgrade to? (I'm assuming 15.X) Thank you.

We are setting up a new stack of switches & would like to know which Switch iOS for a C9300 / C9300xCisco recommended mention 17.12.05 which dates back to March 2025, but there is 17.15.4 dating Aug 2025.The article itself dates to July 2025appreciat...

We tried to do a direct upgrade from 17.06.05 to 17.12.04 and received the errors below.The switch is still on the older version.This is the command I used:install add file usbflash0:cat9k_lite_iosxe.17.12.04.SPA.bin activate commitPWSWCO01#dir flash...

Hello,  I have a port down on a Catalyst 6513 that went down because of the following error is logNov 6 13:16:22.127 EST: %RADIUS-4-RADIUS_DEAD: RADIUS server 10.195.16.100:1645,1646 is not responding.Nov 6 13:16:22.127 EST: %RADIUS-4-RADIUS_ALIVE: R...

how i can clean event list in simulation? (in cisco packet tracer)

I have a customer who is struggling with the Thumbscrews that are used to secure these cables to the routers.   I am trying to find out if there is a part number associated with them and if it is possible to purchase replacement screws.     Or if the...

I have a 9200L as a core switch, with 5 other switches attached by 10GigEthernet cables.  I cannot seem to get to the internet for all but the primary VLan on any of the other 9200L switches.  Please help. 

Hello Team,in our infra we have cisco catalyst  93/92k switches and it is hitting the bug CSCwq31287b any one pleas help on the bug fix ios version.Anjana

Normally we use Proline or Cisco brand SFPs but I'm considering trying some Startech ones for an idea I had.  We have some areas of old OM1 fiber that I'd like to get running some 10G links over to the more remote areas of our property, and the about...