101 · Question #616
BIG-IP Administrator runs the command ITconfig from the BIG-IP command the line end sees a high number of collisions. What is the likely cause?
The correct answer is D. Spanning Tree Protocols biochang the con. High collision counts on a modern switched BIG-IP interface most often indicate a Spanning Tree Protocol instability or loop creating broadcast storms rather than a physical or addressing issue.
Question
BIG-IP Administrator runs the command ITconfig from the BIG-IP command the line end sees a high number of collisions. What is the likely cause?
Options
- AThere is a duplicate IP address on the network
- BA crossover cable has been used
- CThe interface is set to hall duplex
- DSpanning Tree Protocols biochang the con
How the community answered
(40 responses)- A5% (2)
- B3% (1)
- C8% (3)
- D85% (34)
Why each option
High collision counts on a modern switched BIG-IP interface most often indicate a Spanning Tree Protocol instability or loop creating broadcast storms rather than a physical or addressing issue.
A duplicate IP address produces ARP conflicts and intermittent connectivity failures at Layer 3 but does not directly increment interface-level collision counters.
A crossover cable on a port with Auto-MDIX support causes no issue, and even without Auto-MDIX it results in a link-down state rather than high collisions.
A half-duplex interface setting can produce CSMA/CD collisions, but in a switched environment this generates far fewer collisions than an STP-induced broadcast storm flooding the segment.
A Spanning Tree Protocol misconfiguration or topology change can create Layer 2 loops that generate broadcast storms, flooding interfaces and producing abnormally high collision counters visible in interface statistics. On a properly configured switched network, collision counts should be near zero, so an elevated count points to an STP-driven loop condition as the primary suspect.
Concept tested: STP loop causing high collision counts on BIG-IP interface
Source: https://my.f5.com/manage/s/article/K8122
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