Recommended High Port Fencing Thresholds; Recommended Low Port Fencing Thresholds; Port Fencing Configuration Using The Portfencing Command; Table 19 High Port Fencing Threshold Recommendations - Brocade Communications Systems 8 Administrator's Manual

Recommended high port fencing thresholds

It is recommend you use conservative thresholds to prevent false triggers. Examples for the Invalid
Transmitted Words and Invalid CRCs are shown in
TABLE 19
Area
Invalid transmitted words (ITW)
Invalid cyclic redundancy check
error (CRC)

Recommended low port fencing thresholds

Set in-between thresholds to much lower values with an alerting action (RASlog, SNMP trap, or
e-mail). Examples for the Invalid Transmitted Words and Invalid CRCs are shown in
alerts will trigger when the count exceeds the low threshold.
TABLE 20
Area
Invalid transmitted words (ITW)
Invalid cyclic redundancy check
error (CRC)

Port fencing configuration using the portFencing command

The portFencing command enables and configures the port fencing feature; it does not set the
thresholds for port fencing. You must configure port thresholds with the portThconfig command
before you can enable port fencing.
Use the --disable option to disable port fencing for the specified areas on all ports of the specified
port types. Use the --show option to display the configuration. The display includes the configured
port types, error types, and port fencing status (disabled or enabled). Port fencing is disabled by
default.
You can configure a specified port type or a list of port types to enable port fencing for one or more
areas. Use the all option to indicate all port types or all areas.
NOTE
Port fencing configuration on the VE_Port is supported on the FR4-18i router blade and the Brocade
7500 extension switch only. It is not supported on the Brocade 7800 extension switch or the DCX
extension blade.
Fabric Watch Administrator's Guide
53-1001770-01
High port fencing threshold recommendations
High threshold
(per minute)
E_Ports
40
20
Low port fencing threshold recommendations
Low threshold
(per minute)
E_Ports
25
5
Table 19.
High threshold High threshold
(per minute) (per minute)
Storage Host
FOP_Ports FOP_Ports
80 1000
40 1000
Low threshold Low threshold
(per minute) (per minute)
Storage Host
FOP_Ports FOP_Ports
25 25
5 5
7
Port fencing
Default
1000
1000
Table 20. These
Default
1000
1000
75