prConStackFwdingMode
A3COM0420-SWITCH-EXTENSIONS ·
.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-through can help to minimise the delay experienced
by packets before they are forwarded to their destination.
Setting the mode 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 the cut-through 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, say 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.
The actual error rates may differ for different switches.
Whatever forwarding mode is selected, cut-through cannot operate
if the destination port is currently involved in 'cut-through'
from another port. In this case the device will process the
frame in store and forward mode.
Context
- MIB
- A3COM0420-SWITCH-EXTENSIONS
- OID
.1.3.6.1.4.1.43.10.34.1.1- Type
- scalar
- Access
- readwrite
- Status
- mandatory
- Parent
- stackConfigGroup
- Siblings
- 12
Syntax
Enumeration
Values & Constraints
Enumerated Values
1 | fastForward |
2 | fragmentFree |
3 | storeAndForward |
4 | intelligent |
Related Objects
Sibling Objects
| Object | Type | Syntax | OID |
|---|---|---|---|
| prConStackPktRateControl mandatory This object controls whether the packet rate control feature is
enabled or disabled. Products which do not support this feature
will return notApplicable(1)… | scalar | Enumeration | .1.3.6.1.4.1.43.10.34.1.10 |
| prConStackPktRateLimit mandatory This object specifies the maximum rate at which the selected
types of packet may be received from a port before excess
packets are discarded. The limit is s… | scalar | Integer32 | .1.3.6.1.4.1.43.10.34.1.11 |
| prConStackStpProtocolVersion mandatory The version of the Spanning Tree Protocol that is to be used by
this Bridge.
stpVersion0(0) The original version of Spanning Tree,
… | scalar | Enumeration | .1.3.6.1.4.1.43.10.34.1.12 |
| prConStackStpPathCostDefault mandatory The version of the Spanning Tree default Path Costs that are to
be used by this Bridge.
stp8021d1998(1) Path Costs from IEEE Std. 802.1D-1998.
… | scalar | Enumeration | .1.3.6.1.4.1.43.10.34.1.13 |
| prConStackLacpOperInfo mandatory This object shall contain a value indicating that LACP is
operational, or not operational. If not operational, all units
need to be upgraded to the latest … | scalar | Enumeration | .1.3.6.1.4.1.43.10.34.1.14 |
| prConStackPaceMode mandatory This object specifies the type of backoff algorithm used on the
units in the stack. Any suitable port can use the standard
ethernet algorithm or, for PACE ap… | 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 a… | 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 p… | 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… | 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… | 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 s… | scalar | Enumeration | .1.3.6.1.4.1.43.10.34.1.7 |
| prConStackIpTos mandatory This object is used to enable the classification of packets
based upon the value of their IPToS field. When enabled, the
packet's Traffic Classification will… | scalar | Enumeration | .1.3.6.1.4.1.43.10.34.1.9 |