D-ISM-FN-01 · Question #577
A customer uses FCIP to connect local and remote FC SANs. The remote SAN is continuously replicated to, and used to store daily backup data. Latency over the IP WAN increases to unacceptable levels…
The correct answer is A. IP packet segmentation. When an Ethernet frame is larger than the maximum transmission unit (MTU) of a link, it must be fragmented into smaller pieces, which are sent separately and reassembled at the receiver. This is known as IP packet segmentation. Fragmentation and reassembly of the IP packets can…
Question
A customer uses FCIP to connect local and remote FC SANs. The remote SAN is continuously replicated to, and used to store daily backup data. Latency over the IP WAN increases to unacceptable levels during peak replication periods. No other data transfer services using the WAN experience the same latency problem. What is the likely cause of the data replication performance issue?
Options
- AIP packet segmentation
- BFCIP gateway FC ports set to EX_Port mode
- CEthernet frame segmentation
- DFCIP gateway FC ports set to TE_Port mode
How the community answered
(42 responses)- A74% (31)
- B10% (4)
- C2% (1)
- D14% (6)
Explanation
When an Ethernet frame is larger than the maximum transmission unit (MTU) of a link, it must be fragmented into smaller pieces, which are sent separately and reassembled at the receiver. This is known as IP packet segmentation. Fragmentation and reassembly of the IP packets can add significant latency and can cause performance issues for FCIP. In this scenario, the issue is specific to data replication, indicating that the issue is with the FCIP configuration or the replication application.
Topics
Community Discussion
No community discussion yet for this question.