show interfaces ge

Physical interface

Name of the physical interface.

Enabled

State of the interface: Enabled or Disabled.

Interface index

Index number of the physical interface, which reflects its initialization sequence.

SNMP ifIndex

SNMP index number for the physical interface.

Generation

Unique number for use by Juniper Networks technical support only.

Description

Optional user-specified description.

Link-level type

Encapsulation being used on the physical interface.

MTU

Maximum transmission unit size on the physical interface. Default is 1514.

Speed

Speed of the interface: Auto if autonegotiation of speed is enabled; speed in megabits per second if the interface speed is explicitly configured.

Duplex

Link mode of the interface: Auto if autonegotiation of link mode is enabled; Full-Duplex or Half-Duplex if the link mode is explicitly configured.

Loopback

Loopback status: Enabled or Disabled. If loopback is enabled, type of loopback: Local or Remote.

Source filtering

Source filtering status: Enabled or Disabled.

Flow control

Flow control status: Enabled or Disabled.

Auto-negotiation

Autonegotiation status: Enabled or Disabled.

Remote-fault

Remote fault status:

• Online—Autonegotiation is manually configured as online.

• Offline—Autonegotiation is manually configured as offline.

IEEE 802.3az Energy Efficient Ethernet

IEEE 802.3az Energy Efficient Ethernet status: Enabled or Disabled (appears only for EEE-capable Base-T copper Ethernet interfaces).

Device flags

Information about the physical device.

Interface flags

Information about the interface.

Link flags

Information about the link.

CoS queues

Number of CoS queues configured.

Hold-times

Current interface hold-time up and hold-time down, in milliseconds.

Current address

Configured MAC address.

Hardware address

MAC address of the hardware.

Last flapped

Date, time, and how long ago the interface went from down to up. The format is Last flapped: year-month-day hour:minute:second timezone (hour:minute:second ago). For example, Last flapped: 2008–01–16 10:52:40 UTC (3d 22:58 ago).

Statistics last cleared

Time when the statistics for the interface were last set to zero.

Traffic statistics

Number and rate of bytes and packets received and transmitted on the physical interface.

• Input bytes—Number of bytes received on the interface.

• Output bytes—Number of bytes transmitted on the interface.

• Input packets—Number of packets received on the interface

• Output packets—Number of packets transmitted on the interface.

Input errors

Input errors on the interface. The following paragraphs explain the counters whose meaning might not be obvious:

• Errors—Sum of the incoming frame terminated and FCS errors.

• Drops—Number of packets dropped by the input queue of the I/O Manager ASIC. If the interface is saturated, this number increments once for every packet that is dropped by the ASIC's RED mechanism.

• Framing errors—Number of packets received with an invalid frame checksum (FCS).

• Runts—Number of frames received that are smaller than the runt threshold.

• Policed discards—Number of frames that the incoming packet match code discarded because they were not recognized or not of interest. Usually, this field reports protocols that the Junos OS does not handle.

• L3 incompletes—Number of incoming packets discarded because they failed Layer 3 sanity checks of the headers. For example, a frame with less than 20 bytes of available IP header is discarded.

• L2 channel errors—Number of times the software did not find a valid logical interface for an incoming frame.

• L2 mismatch timeouts—Number of malformed or short packets that caused the incoming packet handler to discard the frame as unreadable.

• FIFO errors—Number of FIFO errors in the receive direction that are reported by the ASIC on the PIC. If this value is ever nonzero, the PIC is probably malfunctioning.

• Resource errors—Sum of transmit drops.

Output errors

Output errors on the interface. The following paragraphs explain the counters whose meaning might not be obvious:

• Carrier transitions—Number of times the interface has gone from down to up. This number does not normally increment quickly, increasing only when the cable is unplugged, the far-end system is powered down and then up, or another problem occurs. If the number of carrier transitions increments quickly (perhaps once every 10 seconds), the cable, the far-end system, or the PIC or PIM is malfunctioning.

• Errors—Sum of the outgoing frame terminated and FCS errors.

• Drops—Number of packets dropped by the output queue of the I/O Manager ASIC. If the interface is saturated, this number increments once for every packet that is dropped by the ASIC's RED mechanism.

• Collisions—Number of Ethernet collisions. The Gigabit Ethernet PIC supports only full-duplex operation, so for Gigabit Ethernet PICs, this number should always remain 0. If it is nonzero, there is a software bug.

• Aged packets—Number of packets that remained in shared packet SDRAM so long that the system automatically purged them. The value in this field should never increment. If it does, it is most likely a software bug or possibly malfunctioning hardware.

• FIFO errors—Number of FIFO errors in the send direction as reported by the ASIC on the PIC. If this value is ever nonzero, the PIC is probably malfunctioning.

• HS link CRC errors—Number of errors on the high-speed links between the ASICs responsible for handling the switch interfaces.

• MTU errors—Number of packets whose size exceeded the MTU of the interface.

• Resource errors—Sum of transmit drops.

Egress queues

Total number of egress queues supported on the specified interface.

Queue counters (Egress )

CoS queue number and its associated user-configured forwarding class name.

• Queued packets—Number of queued packets.

• Transmitted packets—Number of transmitted packets.

• Dropped packets—Number of packets dropped by the ASIC's RED mechanism.

Active alarms and Active defects

Ethernet-specific defects that can prevent the interface from passing packets. When a defect persists for a certain time, it is promoted to an alarm. Based on the switch configuration, a defect can activate the red or yellow alarm bell on the switch or turn on the red or yellow alarm LED on the front of the switch. These fields can contain the value None or Link.

• None—There are no active defects or alarms.

• Link—Interface has lost its link state, which usually means that the cable is unplugged, the far-end system has been turned off, or the PIC is malfunctioning.

MAC statistics

Receive and Transmit statistics reported by the PIC's MAC subsystem.

• Total octets and total packets—Total number of octets and packets. For Gigabit Ethernet IQ PICs, the received octets count varies by interface type.

• Unicast packets, Broadcast packets, and Multicast packets—Number of unicast, broadcast, and multicast packets.

• CRC/Align errors—Total number of packets received that had a length (excluding framing bits, but including FCS octets) of between 64 and 1518 octets, inclusive, and had either a bad FCS with an integral number of octets (FCS Error) or a bad FCS with a nonintegral number of octets (Alignment Error).

• FIFO error—Number of FIFO errors reported by the ASIC on the PIC. If this value is ever nonzero, the PIC is probably malfunctioning.

• MAC control frames—Number of MAC control frames.

• MAC pause frames—Number of MAC control frames with pause operational code.

• Oversized frames—Number of frames that exceed 1518 octets.

• Jabber frames—Number of frames that were longer than 1518 octets (excluding framing bits, but including FCS octets), and had either an FCS error or an alignment error. This definition of jabber is different from the definition in IEEE-802.3 section 8.2.1.5 (10BASE5) and section 10.3.1.4 (10BASE2). These documents define jabber as the condition in which any packet exceeds 20 ms. The allowed range to detect jabber is from 20 ms to 150 ms.

• Fragment frames—Total number of packets that were less than 64 octets in length (excluding framing bits, but including FCS octets), and had either an FCS error or an alignment error. Fragment frames normally increment because both runts (which are normal occurrences caused by collisions) and noise hits are counted.

• Code violations—Number of times an event caused the PHY to indicate “Data reception error” or “invalid data symbol error.”

Filter Statistics

Receive and Transmit statistics reported by the PIC's MAC address filter subsystem.

Autonegotiation information

Information about link autonegotiation:

• Negotiation status:

  • Complete—The autonegotiation process between the local and remote Ethernet interfaces was successful.

  • Incomplete—Remote Ethernet interface has the speed or link mode configured or does not perform autonegotiation.

  • No autonegotiation—Local Ethernet interface has autonegotiation disabled and the link mode and speed are manually configured.

• Link partner—Information from the link partner:

  • Link mode—Depending on the capability of the attached Ethernet device, either Full-duplex or Half-duplex. If the link mode of the remote device cannot be determined, the value is Unknown.

  • Flow control—Types of flow control supported by the remote Ethernet device. For Gigabit Ethernet interfaces, the types are: Symmetric (link partner supports PAUSE on receive and transmit); Asymmetric (link partner supports PAUSE on transmit); and Symmetric/Asymmetric (link partner supports PAUSE on both receive and transmit or PAUSE only on receive).

  • Remote fault—Remote fault information from the link partner—Failure indicates a receive link error. OK indicates that the link partner is receiving. Negotiation error indicates a negotiation error. Offline indicates that the link partner is going offline.

  • Link partner speed—Speed of the link partner.

• Local resolution—Resolution of the autonegotiation process on the local interface:

  • Flow control—Type of flow control that is used by the local interface. For Gigabit Ethernet interfaces, the types are: Symmetric (link partner supports PAUSE on receive and transmit); Asymmetric (link partner supports PAUSE on transmit); and Symmetric/Asymmetric (link partner supports PAUSE on both receive and transmit or PAUSE only on receive).

  • Link mode—Link mode of local interface: either Full-duplex or Half-duplex. Displayed when Negotiation status is Incomplete.

  • Local link speed—Speed of the local interface. Displayed when Negotiation status is Incomplete.

  • Remote fault—Remote fault information. Link OK (no error detected on receive), Offline (local interface is offline), and Link Failure (link error detected on receive).

Packet Forwarding Engine configuration

Information about the configuration of the Packet Forwarding Engine:

• Destination slot—FPC slot number:

  • On standalone switches with built-in interfaces, the slot number refers to the switch itself and is always 0.

  • On Virtual Chassis composed of switches with built-in interfaces, the slot number refers to the member ID of the switch.

  • On switches with line cards or on Virtual Chassis composed of switches with line cards, the slot number refers to the line card slot number on the switch or Virtual Chassis.

Logical interface

Name of the logical interface.

Index

Index number of the logical interface, which reflects its initialization sequence.

SNMP ifIndex

SNMP interface index number for the logical interface.

Generation

Unique number for use by Juniper Networks technical support only.

Flags

Information about the logical interface.

Encapsulation

Encapsulation on the logical interface.

Protocol

Protocol family.

Traffic statistics

Number and rate of bytes and packets received (input) and transmitted (output) on the specified interface.

IPv6 transit statistics

EX Series switches do not support the collection and reporting of IPv6 transit statistics.

Local statistics

Number and rate of bytes and packets destined to and from the switch.

Transit statistics

Number and rate of bytes and packets transiting the switch.

Generation

Unique number for use by Juniper Networks technical support only.

Route Table

Route table in which the logical interface address is located. For example, 0 refers to the routing table inet.0.

Input Filters

Names of any input filters applied to this interface.

Output Filters

Names of any output filters applied to this interface.

Flags

Information about protocol family flags.

If unicast reverse-path forwarding (RPF) is explicitly configured on the specified interface, the uRPF flag is displayed. If unicast RPF was configured on a different interface (and therefore is enabled on all switch interfaces) but was not explicitly configured on the specified interface, the uRPF flag is not displayed even though unicast RPF is enabled.

protocol-family

Protocol family configured on the logical interface. If the protocol is inet, the IP address of the interface is also displayed.

Flags

Information about the address flags.

Destination

IP address of the remote side of the connection.

Local

IP address of the logical interface.

Broadcast

Broadcast address of the logical interlace.

Generation

Unique number for use by Juniper Networks technical support only.