Cisco
300-610 · Question #67
Which two methods mitigate congestion in a SAN network? (Choose two.)
The correct answer is A. Configure ER_RDY to allow splitting of each ISL between switches into separate virtual links. D. Configure the port monitor to allow categorization of a specific device as slow.. Extended Receiver Ready - This feature allows each ISL between supporting switches to be split into four separate virtual links, with each virtual link assigned its own buffer-to-buffer credits. Virtual link 0 used to carry control traffic, virtual link 1 is used to carry high-pr
Storage Network Design
Question
Which two methods mitigate congestion in a SAN network? (Choose two.)
Options
- AConfigure ER_RDY to allow splitting of each ISL between switches into separate virtual links.
- BUse the port-monitor command to detect slow drain devices.
- CConfigure the port channel to enable individual buffer-to-buffer credits.
- DConfigure the port monitor to allow categorization of a specific device as slow.
- EConfigure the flow control for the FC to use R_RDY.
How the community answered
(44 responses)- A86% (38)
- B2% (1)
- C5% (2)
- E7% (3)
Explanation
- Extended Receiver Ready - This feature allows each ISL between supporting switches to be split into four separate virtual links, with each virtual link assigned its own buffer-to-buffer credits. Virtual link 0 used to carry control traffic, virtual link 1 is used to carry high-priority traffic, virtual link 2 is used to carry slow devices, and virtual link 3 is used to carry normal traffic. - Congestion Isolation - This feature allows devices to be categorized as slow by either configuration command or by port monitor. - Port monitor portguard action for Congestion Isolation - Port monitor has a new portguard option to allow the categorization of a device as slow so that it can have all traffic flowing to the device routed to the slow virtual link. co_mds9000_interfaces_config_guide_8x/congestion_avoidance_isolation.html
Topics
#SAN congestion#Flow control#Slow drain devices#Fibre Channel
Community Discussion
No community discussion yet for this question.