Dell Brocade 5100 Brocade Fabric OS v7.3.0a Release Notes v2.0 - Page 41

 If the remote port supports QOS and QOS is not explicitly disabled on the local or remote port, the link will come up in QOS mode.  Otherwise, the link will come up in normal mode.  If FOS v7.2 or later is factory installed (or net installed), Adaptive Networking features are always available. This matches the behavior of the Brocade 6520 and all products shipping with prior versions of FOS and with the Adaptive Networking license factory installed.  Ports will come up in AE mode by default  If the remote port supports QOS and is not explicitly disabled, the link will come up in QOS mode. Otherwise, the link will come up in normal mode. Access Gateway  Users who want to utilize Access Gateway's Device-based mapping feature in the ESX environments are encouraged to refer to the SAN TechNote GA-TN-276-00 for best implementation practices. Please follow these instructions to access this technote:  Log in to http://my.brocade.com  Go to Documentation > Tech Notes.  Look for the Tech Note on Access Gateway Device-Based Mapping in VMware ESX Server. Brocade HBA/Adapter Compatibility  Brocade HBA/Adapter should be using driver version 2.3.0.2 or later when attached to 16G ports on Brocade switches. D_Port  The 16Gb QSFP optics used in FC16-64 blade do not support electrical loopback and optical loopback tests. Support is limited to: o Link traffic tests across the 16Gb QSFPs o Roundtrip link latency measurements o Link distance measurements for links that are longer than 100 meter Edge Hold Time  Edge Hold Time (EHT) default settings for FOS v7.x have changed from those in some FOS v6.4.x releases. The following table shows the Default EHT value based on different FOS release levels originally installed at the factory: Factory Installed Version of FOS FOS v7.X FOS v6.4.3x FOS v6.4.2x FOS v6.4.1x Default EHT Value 220 ms 500 ms 500 ms 220 ms Fabric OS v7.3.0a Release Notes v2.0 Page 41 of 55