Fabric OS v6.4.1 Release Notes v1.0 Page 23 of 62
circuits created using IPIFs on the same 10 GbE port (and no more than 1G per circuit).As
a recommended best practice, the VE tunnel shouldn’t be over-subscribed (e.g. 8G FC
traffic over 500Mbps tunnel). General guidelines are 2:1 subscription without
compression and 4:1 with compression.
• Non-disruptive firmware activation will disrupt I/O traffic on FCIP links.
• 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 “Can not 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.
