show interfaces (Fast Ethernet)
Syntax
show interfacesinterface-type<brief | detail | extensive | terse><descriptions><media><snmp-indexsnmp-index><statistics>Release Information
Command introduced before JUNOS Release 7.4.
Description
Display status information about the specified Fast Ethernet interface.
Options
interface-type—On M-series and T-series routing platforms, the interface type isfe-fpc/pic/port. On the J-series routing platform, the interface type isfe-pim/0/port.
brief | detail | extensive | terse—(Optional) Display the specified level of output.
descriptions—(Optional) Display interface description strings.
media—(Optional) Display media-specific information about network interfaces.
snmp-indexsnmp-index—(Optional) Display information for the specified SNMP index of the interface.
statistics—(Optional) Display static interface statistics.Required Privilege Level
List of Sample Output
show interfaces (Fast Ethernet)show interfaces brief (Fast Ethernet)show interfaces detail (Fast Ethernet)show interfaces extensive (Fast Ethernet)Output Fields
Table 25 lists the output fields for the
show interfaces(Fast Ethernet and Gigabit Ethernet) command. Output fields are listed in the approximate order in which they appear.
State of the interface. Possible values are described in Enabled Field.
Index number of the physical interface, which reflects its initialization sequence.
Unique number for use by Juniper Networks technical support only.
Loopback status:
EnabledorDisabled. If loopback is enabled, type of loopback:LocalorRemote.10-Gigabit Ethernet interface operating in Local Area Network Physical Layer Device (LAN PHY) mode. LAN PHY allows 10-Gigabit Ethernet wide area links to use existing Ethernet applications.
10-Gigabit Ethernet interface operating in Wide Area Network Physical Layer Device (WAN PHY) mode. WAN PHY allows 10-Gigabit Ethernet wide area links to use fiber-optic cables and other devices intended for SONET/SDH.
(Gigabit Ethernet interfaces) Autonegotiation status:
EnabledorDisabled.Information about the physical device. Possible values are described in Device Flags.
Information about the interface. Possible values are described in Interface Flags.
Information about the link. Possible values are described in Link Flags.
(10-Gigabit Ethernet dense wavelength-division multiplexing [DWDM] interfaces) Displays the configured wavelength, in nanometers (nm).
(10-Gigabit Ethernet DWDM interfaces only) Displays the frequency associated with the configured wavelength, in terahertz (THz).
Current interface hold-time up and hold-time down, in milliseconds.
Date, time, and how long ago the interface went from down to up. The format is
Last flapped:year-month-day hour:minute:secondtimezone(hour:minute:secondago). For example,Last flapped: 2002-04-26 10:52:40 PDT (04:33:20 ago).Input rate in bits per second (bps) and packets per second (pps).
Time when the statistics for the interface were last set to zero.
Number and rate of bytes and packets received and transmitted on the physical interface.
Input bytes—Number of bytes received on the interfaceOutput 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.For Gigabit Ethernet IQ PICs, the input byte counts vary by interface type. For more information, see Table 26.
Input errors on the interface. The following paragraphs explain the counters whose meaning might not be obvious:
Errors—Sum of the incoming frame aborts 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 software does not handle.L3 incompletes—Number of incoming packets discarded because they failed Layer 3 (usually IPv4) sanity checks of the header. 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 on the interface. The following paragraphs explain the counters whose meaning might not be obvious:
Carrier transitions—Number of times the interface has gone fromdowntoup. 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 aborts 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 router interfaces.MTU errors—Number of packets whose size exceeded the MTU of the interface.Resource errors—Sum of transmit drops.Total number of egress queues supported on the specified interface.
CoS queue number and its associated user-configured forwarding class name.
Ethernet-specific defects that can prevent the interface from passing packets. When a defect persists for a certain amount of time, it is promoted to an alarm. Based on the router configuration, an alarm can ring the red or yellow alarm bell on the router, or turn on the red or yellow alarm LED on the craft interface. These fields can contain the value
NoneorLink.(10-Gigabit Ethernet interfaces) Displays Physical Coding Sublayer (PCS) fault conditions from the WAN PHY or the LAN PHY device.
ReceiveandTransmitstatistics reported by the PIC's MAC subsystem, including the following:
Total octetsandtotal packets—Total number of octets and packets. For Gigabit Ethernet IQ PICs, the received octets count varies by interface type. For more information, see Table 26.Unicast packets, Broadcast packets,andMulticast 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, but 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 errors—Number of FIFO errors that are 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 withpauseoperational 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 between 20 ms and 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.VLAN tagged frames—Number of frames that are VLAN tagged. The system uses the TPID of 0x8100 in the frame to determine whether a frame is tagged or not.Code violations—Number of times an event caused the PHY to indicate "Data reception error" or "invalid data symbol error."
ReceiveandTransmitstatistics reported by the PIC's MAC address filter subsystem. The filtering is done by the content-addressable memory (CAM) on the PIC. The filter examines a packet's source and destination MAC addresses to determine whether the packet should enter the system or be rejected.
Input packet count—Number of packets received from the MAC hardware that the filter processed.Input packet rejects—Number of packets that the filter rejected because of either the source MAC address or the destination MAC address.Input DA rejects—Number of packets that the filter rejected because the destination MAC address of the packet is not on the accept list. It is normal for this value to increment. When it increments very quickly and no traffic is entering the router from the far-end system, either there is a bad ARP entry on the far-end system, or multicast routing is not on and the far-end system is sending many multicast packets to the local router (which the router is rejecting).Input SA rejects—Number of packets that the filter rejected because the source MAC address of the packet is not on the accept list. The value in this field should increment only if source MAC address filtering has been enabled. If filtering is enabled, if the value increments quickly, and if the system is not receiving traffic that it should from the far-end system, it means that the user-configured source MAC addresses for this interface are incorrect.Output packet count—Number of packets that the filter has given to the MAC hardware.Output packet pad count—Number of packets the filter padded to the minimum Ethernet size (60 bytes) before giving the packet to the MAC hardware. Usually, padding is done only on small ARP packets, but some very small IP packets can also require padding. If this value increments rapidly, either the system is trying to find an ARP entry for a far-end system that does not exist or it is misconfigured.Output packet error count—Number of packets with an indicated error that the filter was given to transmit. These packets are usually aged packets or are the result of a bandwidth problem on the FPC hardware. On a normal system, the value of this field should not increment.CAM destination filters, CAM source filters—Number of entries in the CAM dedicated to destination and source MAC address filters. There can only be up to 64 source entries. If source filtering is disabled, which is the default, the values for these fields should be 0.(10-Gigabit Ethernet interfaces, WAN PHY mode) SONET error information:
(10-Gigabit Ethernet interfaces, WAN PHY mode) SONET error information:
(10-Gigabit Ethernet interfaces, WAN PHY mode) Active alarms and defects, plus counts of specific SONET errors with detailed information.
Seconds—Number of seconds the defect has been active.Count—Number of times that the defect has gone from inactive to active.State—State of the error. State other than OK indicates a problem.
BIP-B2—Bit interleaved parity for SONET line overheadREI-L—Remote error indication (near-end line)RDI-L—Remote defect indication (near-end line)AIS-L—Alarm indication signal (near-end line)BERR-SF—Bit error rate fault (signal failure)BERR-SD—Bit error rate defect (signal degradation)ES-L—Errored seconds (near-end line)SES-L—Severely errored seconds (near-end line)UAS-L—Unavailable seconds (near-end line)ES-LFE—Errored seconds (far-end line)SES-LFE—Severely errored seconds (far-end line)UAS-LFE—Unavailable seconds (far-end line)(10-Gigabit Ethernet interfaces, WAN PHY mode) Active alarms and defects, plus counts of specific SONET errors with detailed information.
Seconds—Number of seconds the defect has been active.Count—Number of times that the defect has gone from inactive to active.State—State of the error. State other thanOKindicates a problem.
BIP-B3—Bit interleaved parity for SONET section overheadREI-P—Remote error indicationLOP-P—Loss of pointer (path)AIS-P—Path alarm indication signalRDI-P—Path remote defect indicationUNEQ-P—Path unequippedPLM-P—Path payload label mismatchES-P—Errored seconds (near-end STS path)SES-P—Severely errored seconds (near-end STS path)UAS-P—Unavailable seconds (near-end STS path)SES-PFE—Severely errored seconds (far-end STS path)UAS-PFE—Unavailable seconds (far-end STS path)Information about link autonegotiation.
Incomplete—Ethernet interface has the speed or link mode configured.No autonegotiation—Remote Ethernet interface has the speed or link mode configured, or does not perform autonegotiation.Complete—Ethernet interface is connected to a device that performs autonegotiation and the autonegotiation process is successful.
Link partner status—OKwhen Ethernet interface is connected to a device that performs autonegotiation and the autonegotiation process is successful.Link partner:
Link mode—Depending on the capability of the attached Ethernet device, eitherFull-duplexorHalf-duplex.Flow control—Types of flow control supported by the remote Ethernet device. For Fast Ethernet interfaces, the type isNone. For Gigabit Ethernet interfaces, types areSymmetric(link partner supportsPAUSEon receive and transmit),Asymmetric(link partner supportsPAUSEon transmit), andSymmetric/Asymmetric(link partner supports bothPAUSEon receive and transmit or onlyPAUSEreceive).Remote fault—Remote fault information from the link partner—Failureindicates a receive link error.OKindicates that the link partner is receiving.Negotiation errorindicates a negotiation error.Offlineindicates that the link partner is going offline.
Flow control—Types of flow control supported by the remote Ethernet device. For Gigabit Ethernet interfaces, types areSymmetric(link partner supportsPAUSEon receive and transmit),Asymmetric(link partner supportsPAUSEon transmit), andSymmetric/Asymmetric(link partner supports bothPAUSEon receive and transmit or onlyPAUSEreceive).Remote fault—Remote fault information.Link OK (no error—link OK on receive),Offline(local interface is offline), andLink Failure(link error detected on receive).(10-Gigabit Ethernet interfaces, WAN PHY mode) SONET/SDH interfaces allow path trace bytes to be sent inband across the SONET/SDH link. Juniper Networks and other router manufacturers use these bytes to help diagnose misconfigurations and network errors by setting the transmitted path trace message so that it contains the system hostname and name of the physical interface. The received path trace value is the message received from the router at the other end of the fiber. The transmitted path trace value is the message that this router transmits.
Information about the configuration of the Packet Forwarding Engine:
Destination slot—FPC slot number.CoS transmit queue—Queue number and its associated user-configured forwarding class name.
Bandwidth %—Percentage of bandwidth allocated to the queue.Bandwidth bps—Bandwidth allocated to the queue (in bps).Buffer %—Percentage of buffer space allocated to the queue.Buffer usec—Amount of buffer space allocated to the queue, in microseconds. This value is nonzero only if the buffer size is configured in terms of time.Priority—Queue priority. Possible values arelowandhigh.Limit—Displayed if rate limiting is configured for the queue. Possible values arenoneandexact. Ifexactis configured, the queue transmits only up to the configured bandwidth, even if excess bandwidth is available. Ifnoneis configured, the queue transmits beyond the configured bandwidth if bandwidth is available.Index number of the logical interface, which reflects its initialization sequence.
Unique number for use by Juniper Networks technical support only.
Information about the logical interface. Possible values are described in Logical Interface Flags.
Rewrite profile applied to incoming or outgoing frames on the outer (
Out) VLAN tag or for both the outer and inner (In) VLAN tags.
push—An outer VLAN tag is pushed in front of the existing VLAN tag.pop—The outer VLAN tag of the incoming frame is removed.swap—The outer VLAN tag of the incoming frame is overwritten with the user specified VLAN tag information.push—An outer VLAN tag is pushed in front of the existing VLAN tag.push-push—Two VLAN tags are pushed in from the incoming frame.swap-push—The outer VLAN tag of the incoming frame is replaced by a user-specified VLAN tag value. A user-specified outer VLAN tag is pushed in front. The outer tag becomes an inner tag in the final frame.swap-swap—Both the inner and the outer VLAN tags of the incoming frame are replaced by the user specified VLAN tag value.pop-swap—The outer VLAN tag of the incoming frame is removed, and the inner VLAN tag of the incoming frame is replaced by the user-specified VLAN tag value. The inner tag becomes the outer tag in the final frame.pop-pop—Both the outer and inner VLAN tags of the incoming frame are removed.Protocol family. Possible values are described in Protocol Field.
Unique number for use by Juniper Networks technical support only.
Route table in which the logical interface address is located. For example,
0refers to the routing table inet.0.Information about protocol family flags. Possible values are described in Family Flags.
Information about the address flags. Possible values are described in Addresses, Flags.
Protocol family configured on the logical interface. If the protocol is
inet, the IP address of the interface is also displayed.Information about address flag (possible values are described in Addresses, Flags).
Unique number for use by Juniper Networks technical support only.
show interfaces (Fast Ethernet)
user@host>show interfaces fe-0/0/0Physical interface: fe-0/0/0, Enabled, Physical link is UpInterface index: 128, SNMP ifIndex: 22Link-level type: Ethernet, MTU: 1514, Speed: 100mbps, Loopback: Disabled,Source filtering: Disabled, Flow control: EnabledDevice flags : Present RunningInterface flags: SNMP-Traps Internal: 0x4000CoS queues : 4 supported, 4 maximum usable queuesCurrent address: 00:05:85:02:38:00, Hardware address: 00:05:85:02:38:00Last flapped : 2006-01-20 14:50:58 PST (2w4d 00:44 ago)Input rate : 0 bps (0 pps)Output rate : 0 bps (0 pps)Active alarms : NoneActive defects : NoneLogical interface fe-0/0/0.0 (Index 66) (SNMP ifIndex 198)Flags: SNMP-Traps Encapsulation: ENET2Protocol inet, MTU: 1500Flags: NoneAddresses, Flags: Is-Preferred Is-PrimaryDestination: 10.10.10/24, Local: 10.10.10.1, Broadcast: 10.10.10.255show interfaces brief (Fast Ethernet)
user@host>show interfaces fe-0/0/0 briefPhysical interface: fe-0/0/0, Enabled, Physical link is UpLink-level type: Ethernet, MTU: 1514, Speed: 100mbps, Loopback: Disabled,Source filtering: Disabled, Flow control: EnabledDevice flags : Present RunningInterface flags: SNMP-Traps Internal: 0x4000Logical interface fe-0/0/0.0Flags: SNMP-Traps Encapsulation: ENET2inet 10.10.10.1/24show interfaces detail (Fast Ethernet)
user@host>show interfaces fe-0/0/0 detailPhysical interface: fe-0/0/0, Enabled, Physical link is UpInterface index: 128, SNMP ifIndex: 22, Generation: 5391Link-level type: Ethernet, MTU: 1514, Speed: 100mbps, Loopback: Disabled,Source filtering: Disabled, Flow control: EnabledDevice flags : Present RunningInterface flags: SNMP-Traps Internal: 0x4000CoS queues : 4 supported, 4 maximum usable queuesHold-times : Up 0 ms, Down 0 msCurrent address: 00:05:85:02:38:00, Hardware address: 00:05:85:02:38:00Last flapped : 2006-01-20 14:50:58 PST (2w4d 00:45 ago)Statistics last cleared: NeverTraffic statistics:Input bytes : 0 0 bpsOutput bytes : 42 0 bpsInput packets: 0 0 ppsOutput packets: 1 0 ppsActive alarms : NoneActive defects : NoneLogical interface fe-0/0/0.0 (Index 66) (SNMP ifIndex 198) (Generation 67)Flags: SNMP-Traps Encapsulation: ENET2Protocol inet, MTU: 1500, Generation: 105, Route table: 0Flags: NoneAddresses, Flags: Is-Preferred Is-PrimaryDestination: 10.10.10/24, Local: 10.10.10.1, Broadcast: 10.10.10.255,Generation: 136show interfaces extensive (Fast Ethernet)
user@host>show interfaces fe-0/0/0 extensivePhysical interface: fe-0/0/0, Enabled, Physical link is UpInterface index: 128, SNMP ifIndex: 22, Generation: 5391Link-level type: Ethernet, MTU: 1514, Speed: 100mbps, Loopback: Disabled,Source filtering: Disabled, Flow control: EnabledDevice flags : Present RunningInterface flags: SNMP-Traps Internal: 0x4000CoS queues : 4 supported, 4 maximum usable queuesHold-times : Up 0 ms, Down 0 msCurrent address: 00:05:85:02:38:00, Hardware address: 00:05:85:02:38:00Last flapped : 2006-01-20 14:50:58 PST (2w4d 00:46 ago)Statistics last cleared: NeverTraffic statistics:Input bytes : 0 0 bpsOutput bytes : 42 0 bpsInput packets: 0 0 ppsOutput packets: 1 0 ppsInput errors:Errors: 0, Drops: 0, Framing errors: 0, Runts: 0, Policed discards: 0,L3 incompletes: 0, L2 channel errors: 0, L2 mismatch timeouts: 0,FIFO errors: 0, Resource errors: 0Output errors:Carrier transitions: 3, Errors: 0, Drops: 0, Collisions: 0, Aged packets: 0,FIFO errors: 0, HS link CRC errors: 0, MTU errors: 0, Resource errors: 0Active alarms : NoneActive defects : NoneMAC statistics: Receive TransmitTotal octets 0 64Total packets 0 1Unicast packets 0 0Broadcast packets 0 1Multicast packets 0 0CRC/Align errors 0 0FIFO errors 0 0MAC control frames 0 0MAC pause frames 0 0Oversized frames 0Jabber frames 0Fragment frames 0VLAN tagged frames 0Code violations 0Filter statistics:Input packet count 0Input packet rejects 0Input DA rejects 0Input SA rejects 0Output packet count 1Output packet pad count 0Output packet error count 0CAM destination filters: 1, CAM source filters: 0Autonegotiation information:Negotiation status: CompleteLink partner:Link partner: Full-duplex, Flow control: None, Remote fault: OkLocal resolution:Packet Forwarding Engine configuration:Destination slot: 0CoS transmit queue Bandwidth Buffer Priority Limit% bps % usec0 best-effort 95 950000000 95 0 low none3 network-control 5 50000000 5 0 low noneLogical interface fe-0/0/0.0 (Index 66) (SNMP ifIndex 198) (Generation 67)Flags: SNMP-Traps Encapsulation: ENET2Protocol inet, MTU: 1500, Generation: 105, Route table: 0Flags: NoneAddresses, Flags: Is-Preferred Is-PrimaryDestination: 10.10.10/24, Local: 10.10.10.1, Broadcast: 10.10.10.255,Generation: 136