prConStackFwdingMode
A3COM0054-BRASICA2-SPECIFIC ·
.1.3.6.1.4.1.43.10.34.1.1
Object
scalar
mandatory
r/w
Enumeration
This object controls whether cut-thru is enabled on the
stack. Enabling cut-thru can help to minimise the delay
experienced by packets before they are forwarded to their
destination. Setting cut-thru to 'fastForward' causes frame
forwarding to begin as soon as 32 bytes of the frame have been
received. Setting it to 'fragmentFree' causes frame forwarding
to begin when 64 bytes have been received. This is slower, but
eliminates the risk of forwarding an illegally short frame to
the destination port, however a valid length frame might still
be forwarded even though it had a CRC error. Setting this
object to 'storeAndForward' disables cut-thru completely, and
frames will not be forwarded until they have been received in
their entirety.
When the mode is set to intelligent, the effective switching
mode is set initially to fast forward. The switch then
monitors the total error rate of frames received on each port,
and if it exceeds 20 error frames a second it changes the
effective mode for the port to store and forward. If the error
rate then drops to zero the effective mode is restored to fast
forward.
Whatever forwarding mode is selected, cut-thru cannot operate
if the destination port is currently involved in 'cut-thru'
from another port. In this case the device will process the
frame in store and forward mode.
Context
- MIB
- A3COM0054-BRASICA2-SPECIFIC
- OID
.1.3.6.1.4.1.43.10.34.1.1- Type
- scalar
- Access
- readwrite
- Status
- mandatory
- Parent
- stackConfigGroup
- Siblings
- 6
Syntax
Enumeration
Values & Constraints
Enumerated Values
1 | fastForward |
2 | fragmentFree |
3 | storeAndForward |
4 | intelligent |
Related Objects
Sibling Objects
| Object | Type | Syntax | OID |
|---|---|---|---|
| prConStackPaceMode mandatory This object specifies the type of backoff algorithm used on
the units in the stack. Any port can use the standard ethernet
algorithm or, for PACE applications, it can be set … | scalar | Enumeration | .1.3.6.1.4.1.43.10.34.1.2 |
| prConStackVLANConfigMode mandatory This object specifies the VLAN mode to be used. Setting it to
portMode(2) requires the user to configure each port's VLAN
membership individually, whereas autoSelect(3) caus… | scalar | Enumeration | .1.3.6.1.4.1.43.10.34.1.3 |
| prConStackRAPStudyPort mandatory This determines the ifIndex of the port a user wishes to
monitor on the copy port. Monitoring causes all data from the
study port to be copied to the copy port. The… | scalar | Integer32 | .1.3.6.1.4.1.43.10.34.1.4 |
| prConStackRAPCopyPort mandatory This is the value of ifIndex specifying the port to which
data will be copied (mirrored), and must be set to a valid
value, along with the study port, before monitorin… | scalar | Integer32 | .1.3.6.1.4.1.43.10.34.1.5 |
| prConStackRAPEnable mandatory This object controls the Roving Analysis Port (RAP) feature
in conjunction with prConStackRAPStudyPort and
prConStackRAPCopyPort. The RAP feature allows all fra… | scalar | Enumeration | .1.3.6.1.4.1.43.10.34.1.6 |
| prConStackBridgeMode mandatory The value of this object determines whether the switch is to
operate as a single bridge or as a bridge per VLAN (the
default). In multiple bridge mode the switch mai… | scalar | Enumeration | .1.3.6.1.4.1.43.10.34.1.7 |