Need SNMP OID for STP monitoring on old Catalyst 3750

[na.kochetov]

Hello, fellows!

I have an old cisco catalyst 3750 (12.2(55)SE10) with configured STP.

I'd like to gather STP-related information from this device and tried to use SNMP. BRIDGE-MIB.

OIDs BRIDGE-MIB::dot1dStpRootCost, BRIDGE-MIB::dot1dStpPriority, BRIDGE-MIB::dot1dStpDesignatedRoot return proper results of root-route cost, this certain switch stp priority and designated root switch values respectively. 

But BRIDGE-MIB::dot1dStpRootPort doesn't return right value or I can't interpret it correctly:

snmpwalk -v 2c -c <my_community> <my_dev_ip> BRIDGE-MIB::dot1dStpRootPort
BRIDGE-MIB::dot1dStpRootPort.0 = INTEGER: 1

then I try to get ifName by this index:

snmpwalk -v 2c -c <my_commutity> <my_dev_ip> IF-MIB::ifDescr.1
IF-MIB::ifDescr.1 = STRING: Vlan1

I go to the device and look at sh spanning-tree mst 0 detail

and see my root port is gi1/0/1

if i request all the list of interfaces:

snmpwalk -v 2c -c <my_community> <my_dev_ip> IF-MIB::ifDescr

I get

IF-MIB::ifDescr.1 = STRING: Vlan1
IF-MIB::ifDescr.3 = STRING: Vlan3
IF-MIB::ifDescr.5179 = STRING: StackPort1
IF-MIB::ifDescr.5180 = STRING: StackSub-St1-1
IF-MIB::ifDescr.5181 = STRING: StackSub-St1-2
IF-MIB::ifDescr.10001 = STRING: FastEthernet1/0/1
***
IF-MIB::ifDescr.10024 = STRING: FastEthernet1/0/24
IF-MIB::ifDescr.10101 = STRING: GigabitEthernet1/0/1
IF-MIB::ifDescr.10102 = STRING: GigabitEthernet1/0/2
IF-MIB::ifDescr.14501 = STRING: Null0

So ID of root interface should be 10101. Why do I get ID=1? Do I use wrong MIBs? 

I can provide dotted-decimal values of above mentioned MIBs

Appreciate any help! 

[Suresh Vinayagam Subramanian]

I found this old post . this may answer your question .

https://supportforums.cisco.com/discussion/10074976/mib-cisco-stp-extensions-mib-stpxfaststartportindex-not-accessible

HTH
Regards,
VS.Suresh.

[na.kochetov]

hi again!

I steel need help

I was looking throughout internet and haven't found any solution unfortunately.

I also examined BRIDGE-MIB

ftp://ftp.cisco.com/pub/mibs/v2/BRIDGE-MIB.my

and it reads:

dot1dStpRootPort OBJECT-TYPE
       SYNTAX      Integer32
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The port number of the port that offers the lowest
           cost path from this bridge to the root bridge."
       REFERENCE
           "IEEE 802.1D-1998: clause 8.5.3.3"

       ::= { dot1dStp 7 }

What does actually "port number" mean? My gi1/0/1 should be 25th as a port number, shouldn't it?

But result of request returns as INTEGER=1...

Does anyone know how can I correlate these indexes?

Ok, I went on farther and looked for all MIBs for my c3750 box and found some CISCO-STP_EXTENSIONS-MIB

ftp://ftp.cisco.com/pub/mibs/v2/CISCO-STP-EXTENSIONS-MIB.my

I found some 

stpxMSTPortRoleValue

which is marked deprecated (I checked it with Cisco SNMP Object Navigator)

http://snmp.cloudapps.cisco.com/Support/SNMP/do/BrowseOID.do?objectInput=1.3.6.1.4.1.9.9.82.1.11.12.1.3&translate=Translate&submitValue=SUBMIT&submitClicked=true

and it's recommended to use stpxRSTPPortRoleValue instead:

http://snmp.cloudapps.cisco.com/Support/SNMP/do/BrowseOID.do?objectInput=1.3.6.1.4.1.9.9.82.1.12.2.1.3&translate=Translate&submitValue=SUBMIT&submitClicked=true

But both these OIDs return the same output:

 snmpwalk -v 2c -c <community> <ip> 1.3.6.1.4.1.9.9.82.1.11.12.1.3
SNMPv2-SMI::enterprises.9.9.82.1.11.12.1.3.0.1 = INTEGER: 2
SNMPv2-SMI::enterprises.9.9.82.1.11.12.1.3.0.3 = INTEGER: 3
SNMPv2-SMI::enterprises.9.9.82.1.11.12.1.3.0.4 = INTEGER: 3
SNMPv2-SMI::enterprises.9.9.82.1.11.12.1.3.0.6 = INTEGER: 3
SNMPv2-SMI::enterprises.9.9.82.1.11.12.1.3.0.7 = INTEGER: 3
SNMPv2-SMI::enterprises.9.9.82.1.11.12.1.3.0.8 = INTEGER: 3
SNMPv2-SMI::enterprises.9.9.82.1.11.12.1.3.0.9 = INTEGER: 3
SNMPv2-SMI::enterprises.9.9.82.1.11.12.1.3.0.12 = INTEGER: 3
SNMPv2-SMI::enterprises.9.9.82.1.11.12.1.3.0.16 = INTEGER: 3

It shows me the root port for my MST instance 0

SNMPv2-SMI::enterprises.9.9.82.1.11.12.1.3.[0=MST_INSTANCE].1 = INTEGER: 2

But how can I be sure port number 1 is pointing at gi1/0/1 (with 10101 index) instead of fa1/0/1 (with 10001 index). 

The same picture i see on cisco catalyst 3560

I'll appreciate any help...my conjectures exaused

[na.kochetov]

Unfortunately neither dot1dBasePortIfIndex nor dot1dBasePort  of BRIDGE-MIB did work...

I get 

BRIDGE-MIB::dot1dBasePort = No Such Instance currently exists at this OID

BRIDGE-MIB::dot1dBasePortIfIndex = No Such Instance currently exists at this OID

Actually I don't have any entry of 

dot1dBasePortTable

1.3.6.1.2.1.17.1.4