By default, all CatOS Layer-2 ports are trunking in the Auto mode. This means they send out Dynamic Trunking Protocol (DTP) frames periodically.
When you connect this type of port to a native Cisco IOS® Layer-3 port, they do not understand any Layer 2 trunking frames, and hence, you receive Input errors, the Input queue drops and you receive WrongEncap errors respectively.
Complete one of these steps in order to resolve this issue:
Turn off the default trunking on the CATOS switch with the set trunk mod/port off command.
Set the native Cisco IOS switch port to a Layer 2 port with the switchport command and move the Layer 3 information to a Switch Virtual Interface (SVI), for example, a layer 3 VLAN.
Note: When Cisco IOS port is made into Layer 2 switchport, the default trunking mode is dynamic desirable mode, which means it sends out the DTP frames and also understands the DTP frames sent by the CATOS switch. Since auto-desriable results in a trunk, the link comes up as trunk and works fine with no errors.
For more information on default trunking modes refer,
Greetings!,Hope you guys doing good.In my organization, I have following NAT rule configured.nat (TRPS-Inside,any) source static NET10 NET10 destination static NET10 NET10 no-proxy-arp route-lookupI am not able to understand its significance as I am still...
I was going to install the maintenance release for 3.5, I performed an ftp backup, and then I stopped NCS via ssh so that I could create a VM snapshot. When that was finished, I attempted to run NCS start, and that failed with the following me...
Hello all,New to Cisco, but trying to figure out exactly why my C3560-CX is having slow FTP performance. The switch is brand new, with barely any config, and I'm FTP-ing a new image file to upgrade the IOS. However, the transfer was painfully slow, and up...
On ASA 8.2 I am receiving bulk error notifications about 32K error messages in few hours for the syslog event ID 106006 The Message is as below ""Deny inbound UDP from 10.107.0.32/56506 to 10.113.13.67/514 on interface inside"" Someone please explain in d...