Brocade Fabric OS v6.4.3f Release Notes v1.0

Fabric OS v6.4.3f Release Notes v1.0 Page 23 of 149
 Differences between the Brocade 7800/FX8-24 platforms and previous generation
7500/FR4-18i platforms include:
o On the 7800, the GbE port does not directly correlate to a VE port
o On the FX8-24, GbE ports 0-9 or 10GbE port 1 (xge1) correspond to VE ports 12-21,
and 10 GbE port 0 (xge0) corresponds to VE ports 22-31
o The CLI syntax for the 7800/FX8-24 varies from the 7500/FR4-18i. Please refer to
the Brocade Fabric OS Command Reference document for FOS v6.4 for details
 Under Traffic Isolation Zone, configurations with fail over enabled, Non-TI zone traffic will use the
dedicated path if no other E or VE paths through the fabric exist, or if the non-dedicated paths are not
the shortest paths. (A higher bandwidth tunnel with multiple circuits will become shortest path
compared to a single tunnel).
 A VE/VEX Tunnel and E/EX FC port cannot connect to the same domain at the same time.
 The recommended Keep Alive Timeout must be the same on tunnel/circuits on the switches on both
sides of a link.
 Latency measurements supported on FCIP Tunnels:
o 1GbE - 200ms round trip time and 1% Loss
o 10GbE – 100ms round trip and 0.1% Loss
 Brocade 7800 supports Optical and Copper Media types on GE0 and GE1 interfaces. Copper Media
type is default on GE0/GE1 ports and does not support auto-sense functions.
 After inserting a 4G SFP in GE ports of an FX8-24 blade or 7800 switch, sometimes “sfpshow” output
might display “Cannot read serial data!”. Removing and re-inserting the SFP should resolve this issue.
It is recommended that users perform sfpshow immediately after inserting the SFP and ensure SFP is
seated properly before connecting the cables.
 When running FOS v6.4.0 or later, if any of the following features are enabled in the FCIP
configuration, a downgrade operation below FOS v6.4.0 will be blocked until the features are removed
from the FCIP config:
o IPv6
o IPSec on the FX8-24
o DSCP Markings
o Advanced Compression options 2 and 3 on the FX8-24
o VEX ports on the FX8-24
FCIP (Brocade 7500 and FR4-18i)
 When configuring an FCIP Tunnel to use VLAN tagging on a 7500 or FR4-18i, a static ARP entry must
be configured on the 7500/FR4-18i GE interface for the local gateway. Also a static ARP entry must
be added in the local gateway for the 7500/FR4-18i GE port.
FCoE/CEE (Brocade 8000 and FCOE10-24)
 The Brocade 8000 balances the FCoE bandwidth across all six port groups (each port group contains
four ports). To get optimum performance for FCoE traffic it is recommended that the user distribute
server CNA connections across these six port groups.
 Hot plugging a CP with firmware level less than FOS v6.3.0 into a DCX or DCX-4S with an active
FCOE10-24 blade will result in the new standby CP not coming up.
 Brocade recommends that Converged Mode be enabled on all interfaces connected to CNAs.