I have a stack of cisco 3750 switch (c3750-48ps) which has 4 switches total. Out of 4 one of the switch is showing fan faulty and temperature faulty. I checked the switch and found out that the speed of the fan of that switch is higher than the speed of the fan of the other switches. How can i trouble shoot this or fix this?
Cisco Switch Fan Faulty Temperature Issues – Troubleshooting Guide
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If "IP routing" is disabled then your frames are NOT getting forwarded by your CPU. I am familiar with the output that you are talking about though.
The "show interfaces _ X/X stats" is a hidden command in IOS and as such it really isn't maintained the way most other show commands are.
If you do a "show proc cpu sorted | in Input" then you will see the "IP Input" process. That is the best way that you can see how much of a tax the forwarding plane is putting on your CPU.
Could someone please tell me the community string indexing for switches other than Cisco?
Edit:
This is how to poll Q-BRIDGE-MIB for mac-addresses from the only non-Cisco I have, a DLink DGS-3200. I'm not using [community@vlan] for non-Cisco switches. You're correct that this indexing only applies to Ciscos. I expect any non-Cisco switch, which supports Q-BRIDGE-MIB to work the same way.
Polling sysDescr to document the switch under test
[mpenning@tsunami ~]$ # Demo from a DLink DGS-3200 switch
[mpenning@tsunami ~]$ snmpbulkwalk -v 2c -c public -OXsq 172.16.1.2 sysdescr
sysDescr.0 "DGS-3200-10 Gigabit Ethernet Switch"
[mpenning@tsunami ~]$
Walking dot1qVlanStaticName: List Vlans and their text names
[mpenning@tsunami ~]$
[mpenning@tsunami ~]$ snmpbulkwalk -v 2c -c public 172.16.1.2 .1.3.6.1.2.1.17.7.1.4.3.1.1
BRIDGE-MIB::dot1dBridge.7.1.4.3.1.1.1 = STRING: "default"
[mpenning@tsunami ~]$
dot1qFdbDynamicCount: Number of mac addresses known
[mpenning@tsunami ~]$
[mpenning@tsunami ~]$ snmpbulkwalk -v 2c -c public 172.16.1.2 .1.3.6.1.2.1.17.7.1.2.1.1.2
BRIDGE-MIB::dot1dBridge.7.1.2.1.1.2.1 = Counter32: 17
[mpenning@tsunami ~]$
dot1qVlanCurrentEgressPorts: bitmap of ports in the vlan
[mpenning@tsunami ~]$
[mpenning@tsunami ~]$ snmpbulkwalk -v 2c -c public 172.16.1.2 .1.3.6.1.2.1.17.7.1.4.2.1.4
BRIDGE-MIB::dot1dBridge.7.1.4.2.1.4.2562.1 = Hex-STRING: FF C0 00 00
[mpenning@tsunami ~]$
dot1qTpFdbPort: All MAC Addresses learned
The mac-addresses show up as a string of six decimal digits in the indexes to dot1qTpFdbPort. Note that I have a downstream switch connected to this switch on port 1/5...
[mpenning@tsunami ~]$
[mpenning@tsunami ~]$ snmpbulkwalk -v 2c -c public 172.16.1.2 .1.3.6.1.2.1.17.7.1.2.2.1.2
BRIDGE-MIB::dot1dBridge.7.1.2.2.1.2.1.0.13.101.22.202.65 = INTEGER: 5
BRIDGE-MIB::dot1dBridge.7.1.2.2.1.2.1.0.13.189.7.134.128 = INTEGER: 5
BRIDGE-MIB::dot1dBridge.7.1.2.2.1.2.1.0.13.189.7.134.129 = INTEGER: 5
BRIDGE-MIB::dot1dBridge.7.1.2.2.1.2.1.0.29.161.205.83.70 = INTEGER: 9
BRIDGE-MIB::dot1dBridge.7.1.2.2.1.2.1.0.48.27.188.167.215 = INTEGER: 2
BRIDGE-MIB::dot1dBridge.7.1.2.2.1.2.1.0.192.183.110.158.29 = INTEGER: 3
... more entries here
[mpenning@tsunami ~]$
dot1dBasePortIfIndex: Map values from dot1qTpFdbPort to an ifIndex
[mpenning@tsunami ~]$ snmpbulkwalk -v 2c -c public -OXsq 172.16.1.26 .1.3.6.1.2.1.17.1.4.1.2
dot1dBasePortIfIndex[1] 1
dot1dBasePortIfIndex[2] 2
dot1dBasePortIfIndex[3] 3
dot1dBasePortIfIndex[4] 4
dot1dBasePortIfIndex[5] 5
dot1dBasePortIfIndex[6] 6
dot1dBasePortIfIndex[7] 7
dot1dBasePortIfIndex[8] 8
dot1dBasePortIfIndex[9] 9
dot1dBasePortIfIndex[10] 10
ifName: Map values from ifIndex to an ifName
[mpenning@tsunami ~]$ snmpbulkwalk -v 2c -c public -OXsq 172.16.1.26 ifName
ifName[1] 1/1
ifName[2] 1/2
ifName[3] 1/3
ifName[4] 1/4
ifName[5] 1/5
ifName[6] 1/6
ifName[7] 1/7
ifName[8] 1/8
ifName[9] 1/9
ifName[10] 1/10
ifName[5121] System
[mpenning@tsunami ~]$
ORIGINAL:
There is a mistake in your OID, you're using 1.3.6.2.3.1.17.4.3.1.1; however, dot1dTpFdbAddress is 1.3.6.1.2.1.17.4.3.1.1.
The difference is changing some octets, below...
OID Incorrect: 1.3.6.2.3.1.17.4.3.1.1 <--- Not this
OID Corrected: 1.3.6.1.2.1.17.4.3.1.1 <--- Use this
^ ^
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Best Answer
Use the environment command as a starting point:
The first part of the output should be similar to:
In this example both chassis fans and both power supply fans are reporting all's normal. The system temp is good and I have 17 degrees to go before I reach temp warning.
If one fan is hosed it is very likely that system temp increased and the remaining variable-speed fan has picked up the pace to keep the switch cool.