Change Summary
The following tables summarize the new and changed information in this document, and shows the releases in which each feature is supported. Your software release might not support all the features in this document. For the latest caveats and feature information, see the Bug Search Tool at https://tools.cisco.com/bugsearch/ and the release notes for your software release.
Feature Name |
Release |
Description |
Where Documented |
---|---|---|---|
Interfaces and Port Channels |
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Port Beaconing |
8.4(1) |
This feature is supported on Cisco MDS switches that are operating in Cisco N-Port Virtualizer (Cisco NPV) mode. |
|
Port Beaconing |
8.3(1) |
This feature can be used to identify individual switch and directly attached peer ports in a data center environment. |
|
Port Beaconing |
8.4(1) |
This feature is supported on Cisco MDS switches that are operating in Cisco NPV mode. |
|
Port Monitor |
8.4(1) |
Added support to configure a logging severity level for port monitor syslog messages. |
|
Interfaces |
8.4(1) |
Fixed the output formatting of the show logging onboard txwait command. |
|
Port Beaconing |
8.3(1) |
This feature can be used to identify individual switch and directly attached peer ports in a data center environment. |
|
Interface Modes |
8.1(1) |
The link connecting from a core switch to a Cisco N-Port Virtualizer (NPV) switch must be treated as an ISL (core port) in interfaces and port channels. Port monitor may take portguard action on the link if it is treated as an edge port, which will result in the loss of connectivity to the devices that are connected to the Cisco NPV switch. |
|
Port Monitor |
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Port Monitor Policy |
8.5(1) |
A new port monitor portguard action (cong-isolate-recover) was introduced for the credit-loss-reco, tx-credit-not-available, tx-slowport-oper-delay, and txwait counters. |
|
Port Monitor |
8.1(1) |
The following commands were modified:
|
|
Port Monitor Policy |
8.1(1) |
A new port monitor portguard action (cong-isolate) was introduced for the credit-loss-reco, tx-credit-not-available, tx-slowport-oper-delay, and txwait counters. |
Feature Name |
Release |
Description |
Where Documented |
---|---|---|---|
Buffer-to-Buffer Credit Recovery |
8.4(1) |
Support for buffer-to-buffer credit recovery for NP ports. |
|
Buffer-to-Buffer Credit Recovery |
8.2(1) |
Support for buffer-to-buffer credit recovery for F ports. |
|
Enhanced Receiver Ready |
8.1(1) |
This feature was introduced. The following commands were introduced:
|
Feature Name |
Release |
Description |
Where Documented |
---|---|---|---|
HBA Extended Receiver Ready |
9.3(1) |
Added support on F and NP ports. HBA ER_RDY is in preview (beta) status and not to be used in the production environment. |
|
DIRL NPV Support |
9.3(1) |
Enhanced to support the switches in NPV mode. |
|
Fabric Notifications |
9.2(1) |
The Fabric Notification — FPIN and Congestion Signal feature are out of the preview (beta) status and is used in the production environment. |
|
TxWait OBFL |
9.2(1) |
The TxWait OBFL file size was increased from 512 KB to 8 MB. |
|
Congestion Isolation |
8.5(1) |
This feature is now handled by Fabric Performance Monitor (FPM). The following commands were introduced:
The following commands were deprecated:
|
|
Congestion Isolation Recovery |
8.5(1) |
The Congestion Isolation Recovery feature automatically recovers the flow which was moved to low-priority VL after it was detected as slow back to normal VL; thereby, recovering the flow. The following commands were introduced:
The counter port monitor command was modified to add the cong-isolate-recover port-guard action. |
|
Fabric Notifications |
8.5(1) |
Fabric Notifications are used to notify end devices of performance impacting conditions and behaviors that affect the normal flow of IO such as link integrity degradation and congestion. The following commands were introduced:
The counter port monitor command was modified to add the FPIN port-guard action. |
|
Dynamic Ingress Rate Limiting (DIRL) |
8.5(1) |
DIRL is used to automatically limit the amount of traffic that is flowing through a switch port that is congested. The following commands were introduced:
The counter port monitor command was modified to add the DIRL port-guard action. |
|
Fibre Channel and Fibre Channel over Ethernet (FCoE) |
8.4(1) |
The following commands were modified:
The following command outputs were modified:
|
|
Fibre Channel over Ethernet (FCoE) |
8.2(1) |
New FCoE commands were introduced and some FCoE commands were modified to align with the commands used in Fibre Channel. |
|
Extended Receiver Ready |
8.1(1) |
This feature allows each Inter-Switch Link (ISL) between supporting switches to be split into four separate virtual links, with each virtual link assigned its own buffer-to-buffer credits. The following commands were introduced:
|
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Congestion Isolation |
8.1(1) |
This feature allows devices to be categorized as slow by either configuration command or by the port monitor. The following commands were introduced:
The cong-isolate portguard action was added to the following commands:
|
|
Congestion Drop Timeout, No-Credit Frame Timeout, and Slow-Port Monitor Timeout Values for Fibre Channel |
8.1(1) |
The link connecting a core switch to a Cisco NPV switch should be treated as an ISL (core port) for the purposes of congestion-drop, no-credit-drop, and slowport-monitor thresholds for Fibre Channel. Previously, core ports were subject to any change in the congestion-drop or no-credit-drop mode F value. |
|
Slow Drain Detection and Congestion Isolation |
8.1(1) |
The new Congestion Isolation feature can detect a slow-drain device via port monitor or manual configuration and isolate it from other normally performing devices on an ISL. Once the traffic to the slow-drain device is isolated, the traffic to the rest of the normally behaving devices remain unaffected. Traffic isolation is accomplished via the following three features:
|
Feature Name |
Release |
Description |
Where Documented |
---|---|---|---|
Port channels |
8.4(1) |
The default port channel mode is changed from On to Active mode. |
Feature Name |
Release |
Description |
Where Documented |
---|---|---|---|
N Port Virtualization (NPV) Load Balancing |
8.5(1) |
NPV load balancing scheme is enhanced to propose a mapping of server interfaces to external interfaces based on the throughput value so that the traffic can be evenly distributed on the external interfaces. The following commands were introduced:
|
|
N Port Identifier Virtualization |
8.4(2) |
The NPIV feature is enabled by default. |
|
NP Ports |
8.4(1) |
Buffer-to-Buffer State Change Notification (BBSCN) allowed on NP Ports |