Port statistics - transmit and receive


View the combined transmit and receive statistics for one or more ports. These statistics are defined in RFC 2665, Definitions of Managed Objects for the Ethernet-like Interface Types.

Access mode

exec

Syntax

show port statsMIB

Output Description

Heading Description Filter
IfName The system-assigned port name, in the format type.slot.portNumber. ifName IfName
Alignment Errors The number of frames received that are not an integral number of bytes long and that fail the FCS check. alignmentErrors counter32
FCS Errors The number of frames received that are an integral number of bytes long but that fail the FCS check. This number does not include the frame-too-long number. fcsErrors counter32
Single Collision Frames The number of frames transmitted that met with just one collision before the 64-bytes traversed the connection. singleCollisionFrames counter32
Multiple Collision Frames The number of frames transmitted that met with more than one collision before the 64-bytes traversed the connection. multipleCollisionFrames counter32
Deferred Transmissions The number of frames that were ultimately sent after the system initially deferred them (the first transmission attempt was delayed because the medium was busy). This number does not include frames involved in any collisions. deferredTransmissions counter32
Late Collisions The number of times a collision is detected later than one slot-time from the start of packet transmission. On 10/ 100-Mbps systems, one slot-time = 512 bit-times = 51.2 and 5.12 microseconds, respectively. On 1000-Mbps systems, one slot-time = 4096 bit-times = 4.096 microseconds. lateCollisions counter32
Excessive Collisions The number of frames transmitted that exceeded the 16-collision limit on attempting to cross the connection, causing the system to drop the packet. excessiveCollisions counter32
Internal MAC Transmit Errors The number of frames that fail transmission due to an internal MAC sublayer transmit error. This number does not include late collisions or excessive collisions. internalMacTransmitErrors counter32
Frame Too Long The number of frames received on the port that exceeded the standard Ethernet size limitation but had a valid CRC. Size limitations are:

Without jumbo frames enabled, frames over 1518 bytes or 1522 bytes for VLAN frames.

With jumbo frames enabled, frames over 9018 bytes or 9022 bytes for VLAN frames.
frameTooLongs counter32
Internal MAC Receive Errors The number of frames that fail reception due to an internal MAC sublayer receive error. This number does not include alignment, FCS, or frame-too-long errors. internalMacReceiveErrors counter32
Short Frames The number of frames transmitted and received that were less than 64 bytes and had a good CRC. shortframes counter32
Fragments And Runts The number of frames that were less than 64 bytes and had a bad CRC. (Fragments are received frames and runts are transmitted frames.) fragRunt counter32
Total RX Frames The total number of received frames. rxFrames counter32
Total TX Frames The total number of transmitted frames. txFrames counter32
Jabber The number of transmitted and received frames on the port that exceeded the standard Ethernet size limitation and had a bad CRC. Size limitations are:

Without jumbo frames enabled, frames over 1518 bytes or 1522 bytes for VLAN frames.

With jumbo frames enabled, frames over 9018 bytes or 9022 bytes for VLAN frames.
jabber counter32
Jumbo Frames The number of frames transmitted and received that qualified as jumbo frames (between 1518 and 9018 bytes to support 100M and Gigabit Ethernet). This count is only applicable if jumbo frames were enabled. jumbo counter32