We have added a new VLAN in our network and changed 3 switchces to the new VLAN (all ports). Now I'm not able to telnet to only those 3 switches. I get the following: "% Authentication failed." I can ping them and all the workstations can communicate...

Every hour or so connectivity is lost to a 2900XL switch on the network, I'm not able to ping or telnet for about 2 to 5 minutes, but connectivity to the web servers and internet never gets interrupted, (Switch is connected to a firewall then Interne...

I enabled an interface on a 2924XL Switch which is a usual business but this time the interface goes down right away. Checked the inteface and got:FastEthernet0/9 is down, line protocol is down...Checked the log and got this:Jun 1 19:55:01.927: %LI...

Need documentation for maximum users per upstream (of Cable Modems) on the NG10012 uBR based on: contention, peak busy times. What's the bandwidth per line card usable with 64 qam downstream channel if I want to guarantee 256 Kbps minimum bandwidth t...

What causes the following link errors on the 2900 and 3500 Cisco switches platforms?" %LINK-4-ERROR: FastEthernet0/1 is experiencing errors" Knowing that:Physical connections have been verified/changed and are fine.Duplex and speed between the Switch...