Switching

Hello,A bit perplexed here. Replaced 10 switches with new switches connected C4500 via fiber.   All switches run MST0.  C4500 ports always link up and have no errors.  But all 10 C4500 fiber downlinks follow this cycle: about 30 seconds in "forwardin...

So, got a brand-spankin' new Catalyst 9300.  Racked it up, connected to console port with PuTTY, booted the switch.  Went through the basic configuration script.  When it was done, I tried to enter enable mode and found I couldn't - evidently, I fat-...

Please help me to resolve this issue

EsteEstoy recibiendo este error en 4 computadoras que están en rojo.Por favor, ayúdame.Este es el vlsm que utilicé

Hello,We have a Catalyst 9400 that appeared to simply cease operating the other day. We had to reload it to restore it to service. We managed to get this message out of it in the logs - Nov 23 17:17:49.532: %FED_L3M_ERRMSG-3-RSRC_ERR: F0/0: fed: Fail...

I have some Catalyst switches (3560X, 3750X and 3560CX) all running the latest IOS releases.  I'm aware the 3560X/3750X are now EoL.  I'm attempting some IBNS 2.0 configurations and want to bypass authentication for IP Phones.  This works perfectly f...

Ah I managed to fix this after all. Turns out it was just a rookie mistake, but I can't delete the post

Hi all, we did an upgrade of a 2x C9300-24S stack to 17.06.04, before the upgrade ports 1/0/2-1/0/5 were connected,  but after the upgrade these ports were showing notconnected, moved the same SFPs to ports 1/0/14-1/0/17 and it works. we did reboot,...

Two C9800-40I'm trying to redundancy. If the port on the switch to which the active unit is connected is shut down, it is normal for a failover to occur and a standby to occur. But it goes into the removed state as if the rp was cut off and stops wor...