All MIBs › Unisphere-Data-HDLC-MIB › usdHdlcIfMtu
usdHdlcIfMtu
Module: Unisphere-Data-HDLC-MIB
OID (symbolic): Unisphere-Data-HDLC-MIB::usdHdlcIfMtu
OID (numeric): 1.3.6.1.4.1.4874.2.2.9.1.2.1.4
Node type: OBJECT-TYPE
Type: Integer32
Access: read-create
Description: The Maximum Transmission Unit (MTU) this interface is permitted to transmit.
At creation, if a value for this object is not specified, a default will be chosen that is suitable for the type of lower interface on which this interface is stacked.
This setting plus 2 bytes for HDLC address/control plus the length in bytes of the HDLC CRC cannot exceed 65535. The maximum value for this object reflects the largest possible value when no CRC is used; technology constraints of a particular implementation may further limit the upper bound value.
What is usdHdlcIfMtu?
This value sets the Maximum Transmission Unit this HDLC interface may transmit; combined with 2 bytes of HDLC address/control overhead plus the CRC length, the total cannot exceed 65535, and a suitable default is chosen automatically if left unspecified at creation. Admins tune it to match the MTU requirements of the traffic riding over this HDLC link, ensuring it doesn't exceed what the underlying transport and CRC overhead allow. Setting it to 1500 would configure a standard Ethernet-equivalent payload size for frames sent over this HDLC interface.
OID Breakdown
Upper-level ancestors (13 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 |
| 1.3.6.1.4.1.4874 | juniperUni | Juniper-UNI-SMI |
| 1.3.6.1.4.1.4874.2 | juniperUniMibs | Juniper-UNI-SMI |
| 1.3.6.1.4.1.4874.2.2 | juniMibs | Juniper-MIBs |
| 1.3.6.1.4.1.4874.2.2.9 | juniHdlcMIB | Juniper-HDLC-MIB |
| 1.3.6.1.4.1.4874.2.2.9.1 | juniHdlcObjects | Juniper-HDLC-MIB |
| 1.3.6.1.4.1.4874.2.2.9.1.2 | juniHdlcIfTable | Juniper-HDLC-MIB |
| 1.3.6.1.4.1.4874.2.2.9.1.2.1 | juniHdlcIfEntry | Juniper-HDLC-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.4874.2.2.9.1.2.1.4 | usdHdlcIfMtu | Unisphere-Data-HDLC-MIB |