Table of Contents
Advertisement
Chapter 11
Configuring Interfaces
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m .
Command
Step 3
switch(config-if)# switchport mode F
switch(config-if)#
switch(config-if)# switchport mode auto
switch(config-if)#
TL Port ALPA Caches
Although TL ports cannot be automatically configured, you can manually configure entries in arbitrated
loop physical address (ALPA) caches. Generally, ALPA cache entries are automatically populated when
an ALPA is assigned to a device. Each device is identified by its port world wide name (pWWN). When
a device is allocated an ALPA, an entry for that device is automatically created in the ALPA cache.
A cache contains entries for recently allocated ALPA values. These caches are maintained on various TL
ports. If a device already has an ALPA, the Cisco SAN-OS software attempts to allocate the same ALPA
to the device each time. The ALPA cache is maintained in persistent storage and saves information across
switch reboots. The maximum cache size is 1000 entries. If the cache is full, and a new ALPA is
allocated, the Cisco SAN-OS software discards an inactive cache entry (if available) to make space for
the new entry.
See the
To manually insert entries into the ALPA cache, follow these steps:
Command
Step 1
switch# config t
Step 2
switch(config)# tlport alpa-cache interface
fc1/2 pwwn 22:00:00:20:37:46:09:bd alpa 0x02
Step 3
switch(config)# tlport alpa-cache interface
fc1/3 pwwn 22:00:00:20:37:46:09:bd
Displaying the ALPA Cache Contents
The show tlport alpa-cache command displays the contents of the ALPA cache.
switch# show tlport alpa-cache
---------------------------------------------------------
alpa
---------------------------------------------------------
0x02
0x04
The first entry indicates that if a device with a pWWN of 22:00:00:20:37:46:09:bd is exported on TL
port fc1/2, then the pWWN is allocated an alpa 0x02 (if available).
OL-6973-03, Cisco MDS SAN-OS Release 2.x
"Displaying TL Port Information" section on page 11-32
pWWN
22:00:00:20:37:46:09:bd
23:00:00:20:37:46:09:bd
Purpose
Configures the administrative mode of the port. You
can set the operational state to auto, E, F, FL, Fx, TL,
or SD port mode.
Note
Fx ports refers to an F port or an FL port (host
connection only), but not E ports.
Configures the interface mode to auto-negotiate an E,
F, FL, or TE port mode (not TL or SD port modes) of
operation.
Note
TL ports and SD ports cannot be configured
automatically. They must be administratively
configured.
Purpose
Enters configuration mode.
Configures manual entries into the ALPA cache.
Removes this entry from the ALPA cache.
Interface
fc1/2
fc1/2
Cisco MDS 9000 Family Configuration Guide
Fibre Channel Interfaces
for more information on TL ports.
11-11
Advertisement
Table of Contents
