| Exam 300-115 | Question id=1354 | Layer 2 Technologies |
Which option is a possible cause for an errdisabled interface?
| A. |
routing loop | |
| B. |
cable unplugged | |
| C. |
STP loop guard | |
| D. |
security violation |
There are various reasons for the interface to go into errdisable. The reason can be:
* Duplex mismatch
* Port channel misconfiguration
* BPDU guard violation
* UniDirectional Link Detection (UDLD) condition
* Late-collision detection
* Link-flap detection
* Security violation
* Port Aggregation Protocol (PAgP) flap
* Layer 2 Tunneling Protocol (L2TP) guard
* DHCP snooping rate-limit
* Incorrect GBIC / Small Form-Factor Pluggable (SFP) module or cable
* Address Resolution Protocol (ARP) inspection
* Inline power