All MIBs › CISCO-VTP-MIB › vlanTrunkPortVlansXmitJoined
vlanTrunkPortVlansXmitJoined
Module: CISCO-VTP-MIB
OID (symbolic): CISCO-VTP-MIB::vlanTrunkPortVlansXmitJoined
OID (numeric): 1.3.6.1.4.1.9.9.46.1.6.1.1.11
Node type: OBJECT-TYPE
Type: OCTET STRING
Access: read-only
Description: A string of octets containing one bit per VLAN in the management domain on this trunk port. The first octet corresponds to VLANs with VlanIndex values of 0 through 7; the second octet to VLANs 8 through 15; etc. The most significant bit of each octet corresponds to the lowest value VlanIndex in that octet.
If the bit corresponding to a VLAN is set to '1', then this VLAN is presently being forwarded on this trunk port, i.e., it is not pruned; if the bit is set to '0', then this VLAN is presently not being forwarded on this trunk port, either because it is pruned or for some other reason.
What is vlanTrunkPortVlansXmitJoined?
This read-only bitmap reports, one bit per VLAN, which VLANs are currently being forwarded on a specific trunk port, with the first octet covering VLANs 0 through 7 and so on, up to VLAN 1023 across its 128 octets. An administrator inspects this bitmap to confirm exactly which VLANs are actively passing traffic across a given trunk link at this moment, which is especially useful when VTP pruning is active and not every configured VLAN is forwarded on every trunk. For example, if a VLAN expected to be forwarded on a trunk has its bit cleared in vlanTrunkPortVlansXmitJoined, that VLAN's traffic is being pruned from that link rather than actually failing to reach it.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.9.9.46.1.6.1.1.11 snmpwalk -v2c -c public <target> CISCO-VTP-MIB::vlanTrunkPortVlansXmitJoined
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.9.9.46.1.6.1.1.11.1 snmpget -v2c -c public <target> CISCO-VTP-MIB::vlanTrunkPortVlansXmitJoined.1
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OID Breakdown
Upper-level ancestors (8 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.9 | cisco | CAT2600-MIB |
| 1.3.6.1.4.1.9.9 | ciscoMgmt | CISCO-SMI |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.9.9.46 | ciscoVtpMIB | CISCO-VTP-MIB |
| 1.3.6.1.4.1.9.9.46.1 | vtpMIBObjects | CISCO-VTP-MIB |
| 1.3.6.1.4.1.9.9.46.1.6 | vlanTrunkPorts | CISCO-VTP-MIB |
| 1.3.6.1.4.1.9.9.46.1.6.1 | vlanTrunkPortTable | CISCO-VTP-MIB |
| 1.3.6.1.4.1.9.9.46.1.6.1.1 | vlanTrunkPortEntry | CISCO-VTP-MIB |
| 1.3.6.1.4.1.9.9.46.1.6.1.1.11 | vlanTrunkPortVlansXmitJoined | CISCO-VTP-MIB |