Cisco SG500X how to change port assigned VLAN via SNMP
I want to change the VLAN assigned to a port on a SG500X using SNMP. The running firmware version is 188.8.131.52 .
What I have done so far:
- definded some VLANs with the web interface - enabled SNMP and configured communitiy and password for SNMPv2c and configured engine-ID and security name for SNMPv3 - tried SNMPv2c and SNMPv3 requests (get, set, walk) fom the Windows 10 command line tool with the shell tools from snmpsoft.com - followed the instructions on this thread for vlan snmp management on a catalyst
When I send a snmpwalk request for the "ifDescr" OID (.184.108.40.206.220.127.116.11.1.2) to get the ifIndex referring to the Ports, the first shown ifIndex is 49 for gigabitethernet1/1/1. This works with SNMPv2c and SNMPv3 as well.
All gigabitethernet ports were assigned to a vlan by the web interface and is shown there correctly. When I send a snmpget request with the "vmVlan" OID with the ifIndex of any port (for example port 15 --> ifIndex63: .18.104.22.168.22.214.171.124.126.96.36.199.1.2.63 ) I just get: - with SNMPv2c: %Failed to get value of SNMP variable. Variable does not exist (noSuchName(2)) - with SNMPv3: OID=.188.8.131.52.184.108.40.206.220.127.116.11.1.2.63 Type=<Unknown> Value=
Same with snmpset and SNMPv2c, but with SNMPv3 I get: %Failed to set value to SNMP variable. Not Writable (notWritable(17))
I dont know where else to find a solution for this problem and moreover what exactly the problem is. May it because not Catalyst systems use another OID? And shouldnt I get an ifIndex starting from Zero or one from the snmpwalk request?
Re: Cisco SG500X how to change port assigned VLAN via SNMP
Thank you for your prompt reply!
In the MIB files you linked, I unfortunately found no way to connect a port/interface of the switch with an existing VLAN or rather change a VLAN of a port.
I just found an OID where the individual Indexes (mapped to the ports) return the Indexes of the assigned VLANs. It is <.iso.org.dod.internet.mgmt.mib-2.dot1dBridge.qBridgeMIB.qBridgeMIBObjects.dot1qVlan.dot1qPortVlanTable.dot1qPortVlanEntry.dot1qPvid> or as a number .18.104.22.168.22.214.171.124.126.96.36.199.1
This one is "readable and writable" so I simply tried to SNMPwrite another (existing) VLAN-Index to
.188.8.131.52.184.108.40.206.220.127.116.11.1.50 for example, which is gigabitethernet1/1/2. As type of the value I used uint (original value given from SNMPread is GAUGE32 ) The apperaring error message is: %Failed to set value to SNMP variable. General Error (genErr(5))
If I try to set the VLAN in the SNMPwrite command to the one the port actually has, the CLI shows: OK
At least something must be right I guess?!?
So further on my question persitsts. Any more ideas?
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