---
oid: "1.3.6.1.2.1.138.1.4.1.1.6"
short-description: "isisCircLevelID OBJECT-TYPE"
last-modified: "2020-03-26"
parent-oid: "1.3.6.1.2.1.138.1.4.1.1"
---

## OID: `1.3.6.1.2.1.138.1.4.1.1.6`

```asn1
{iso(1) identified-organization(3) dod(6) internet(1) mgmt(2) mib-2(1) isisMIB(138) isisObjects(1) isisCircLevelValues(4) isisCircLevelTable(1) isisCircLevelEntry(1) isisCircLevelID(6)}
```

### Description

```asn1
isisCircLevelID OBJECT-TYPE
SYNTAX IsisCircuitID
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"On a point-to-point circuit with a fully initialized
adjacency to a peer IS, the value of this object is
the circuit ID negotiated during adjacency initialization.
On a point to point circuit without such an adjacency,
the value is the concatenation of the local system ID
and the one-byte isisCircLevelIDOctet for this circuit,
i.e., the value that would be proposed for the circuit ID.
On other circuit types, the value returned is the zero-
length OCTET STRING."
REFERENCE "{ISIS.aoi ptPtCircuitID (51)}"
```

**Classification:** MIB object for network management

### Supplementary information

Automatically extracted from IETF [RFC 4444](https://www.rfc-editor.org/rfc/rfc4444.html).

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No child OID

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