Which two methods mitigate congestion in a SAN network? (Choose two.)
A. Configure ER_RDY to allow splitting of each ISL between switches into separate virtual links.
B. Use the port-monitor command to detect slow drain devices.
C. Configure the port channel to enable individual buffer-to-buffer credits.
D. Configure the port monitor to allow categorization of a specific device as slow.
E. Configure the flow control for the FC to use R_RDY.
I Think : AD
information About Congestion Isolation
The Congestion Isolation feature can detect a slow-drain device via port monitor or manual configuration and isolate the slow-drain device from other normally performing devices on an ISL. After the traffic to the slow-drain device is isolated, the traffic to the rest of the normally behaving devices will be unaffected. Traffic isolation is accomplished using the following three features:
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.