Bypass High Speed fan tray req for Sup720

Question

Anyone use the command to disabled this feature? What's the command? What's the procedure (boot ROM)? How long can the system run without causing damage? Immediate need to boot until high fan tray can be delivered.

Answer 1

The command is ALLOWANYFAN=1 in ROMMON. I did not have to use set to add variable, but use it to view. I'm not sure if it's case sensitive. I used all upper case and alarm indicators went out on sup module. Here's some log outout. Notice the temp rising. (The chassis powered down sup module after approx. 5 minutes without these commands. Notice the logg buff output warnings).
rommon 1 > set
PS1=rommon ! >
RTS=02:59:30 PDT Sat Aug 27 2005
?=0
BOOT=disk0:s72033-ipservicesk9_wan-mz.122-18.SXE2.bin,1;
BSI=0
RET_2_RCALTS=
ACL_DENY=0
PF_REDUN_CRASH_COUNT=0
rommon 2 > ALLOWANYFAN=1
rommon 3 > ALLOWANYPS=1
AFTER:
rommon 4 > set
PS1=rommon ! >
LOG_PREFIX_VERSION=1
SLOTCACHE=cards;
RET_2_RTS=02:59:30 PDT Sat Aug 27 2005
BOOT=disk0:s72033-ipservicesk9_wan-mz.122-18.SXE2.bin,1;
BSI=0
RET_2_RCALTS=
ACL_DENY=0
PF_REDUN_CRASH_COUNT=0
?=0
ALLOWANYFAN=1
Router#sh mod
Mod Ports Card Type Model Serial No.
2 48 CEF720 48 port 10/100/1000mb Ethernet WS-X6748-GE-TX SAD09330AVJ
3 48 CEF720 48 port 10/100/1000mb Ethernet WS-X6748-GE-TX SAD093307MP
5 2 Supervisor Engine 720 (Active) WS-SUP720-3B SAL09337RHD
FIRST SHOW TEMP:
Router#sh envir cool
fan-tray 1:
fan-tray 1 type: WS-C6K-9SLOT-FAN
fan-tray 1 version: 1
fan-tray 1 fan-fail: OK
chassis per slot cooling capacity: 37 cfm
module 2 cooling requirement: 70 cfm
module 3 cooling requirement: 70 cfm
module 5 cooling requirement: 35 cfm
Router#sh envir temp
VTT 1 outlet temperature: 19C
VTT 2 outlet temperature: 19C
VTT 3 outlet temperature: 32C
module 2 outlet temperature: 22C
module 2 inlet temperature: 16C
module 5 outlet temperature: 24C
module 5 inlet temperature: 19C
module 5 device-1 temperature: 28C
module 5 device-2 temperature: 27C
module 5 asic-1 (SSO-1) temp: 19C
module 5 asic-2 (SSO-2) temp: 18C
module 5 asic-3 (SSO-3) temp: 18C
module 5 asic-4 (SSO-4) temp: 19C
module 5 asic-5 (SSA-1) temp: 18C
module 5 asic-6 (HYPERION-1) temp: 18C
module 5 RP outlet temperature: 20C
module 5 RP inlet temperature: 20C
module 5 EARL outlet temperature: 32C
module 5 EARL inlet temperature: 19C
LAST SHOW TEMP:
Router#sh envir temp
VTT 1 outlet temperature: 19C
VTT 2 outlet temperature: 19C
VTT 3 outlet temperature: 29C
module 2 outlet temperature: 38C
module 2 inlet temperature: 18C
module 5 outlet temperature: 26C
module 5 inlet temperature: 19C
module 5 device-1 temperature: 31C
module 5 device-2 temperature: 31C
module 5 asic-1 (SSO-1) temp: 19C
module 5 asic-2 (SSO-2) temp: 19C
module 5 asic-3 (SSO-3) temp: 19C
module 5 asic-4 (SSO-4) temp: 19C
module 5 asic-5 (SSA-1) temp: 19C
module 5 asic-6 (HYPERION-1) temp: 19C
module 5 RP outlet temperature: 21C
module 5 RP inlet temperature: 21C
module 5 EARL outlet temperature: 35C
module 5 EARL inlet temperature: 20C
LOGGING BUFFER WARNINGS:
00:01:23: %OIR-SP-6-INSPS: Power supply inserted in slot 1
00:01:23: %C6KPWR-SP-4-PSOK: power supply 1 turned on.
00:01:24: SP: Warning: Module 2 cannot be sufficiently cooled. Should disallow module power up
but allowing.
00:01:25: SP: Warning: Module 3 cannot be sufficiently cooled. Should disallow module power up
but allowing.
00:01:25: SP: Warning: DFC on Supervisor requires chassis fan upgrade. Should shutdown system b
ut not doing so.
00:01:26: %FABRIC-SP-5-CLEAR_BLOCK: Clear block option is off for the fabric in slot 5.
00:01:26: %FABRIC-SP-5-FABRIC_MODULE_ACTIVE: The Switch Fabric Module in slot 5 became active.
00:01:26: SP: Warning: Module 2 cannot be sufficiently cooled. Should disallow module power up
but allowing.
00:01:26: SP: Warning: Module 2 cannot be sufficiently cooled. Should disallow module power up
but allowing.