Monitoring Port Statistics

Purpose

Display the status of Gigabit Ethernet interfaces. You can use the delta keyword to view baselined statistics. You can use the brief keyword to view the operational status of all configured interfaces.

Note: The E120 and E320 routers output for monitor and show commands is identical to output from other E Series routers, except that the E120 and E320 router output also includes information about the adapter identifier in the interface specifier (slot/adapter/port).

Action

To display the status of a Gigabit Ethernet interface:

host1#show interfaces gigabitEthernet 14/0/0
	GigabitEthernet14/0/0 is Up, Administrative status is Up
	Hardware is Intel IXF1104, address is 0090.1a42.0b87
	MAU is 1000BASE-SX
 TX Output Power: 469.6 uW	RX Input Power: 0.5 uW
	MTU: Operational 1518, Administrative 1518
	Duplex Mode: Operational Full Duplex, Administrative Auto Negotiate
	Speed: Operational 1000 Mbps, Administrative Auto Negotiate
	Debounce: State is Disabled
 5 minute input rate 0 bits/sec, 0 packets/sec
	5 minute output rate 0 bits/sec, 0 packets/sec
	In: Bytes 0, Unicast 0
	Multicast 0, Broadcast 0
	Errors 0, Discards 0, Mac Errors 0, Alignment 0
	CRC 0, Too Longs 0, Symbol Errors 0
	Out: Bytes 0, Unicast 0
	Multicast 0, Broadcast 0
	Errors 0, Discards 0, Mac Errors 0, Deferred 0, No Carrier 0
	Collisions: Single 0, Multiple 0, Late 0, Excessive 0
	Policed Statistics:
	In: 0, Out: 0
	ARP Statistics:
	In: ARP requests 0, ARP responses 0
	Errors 0, Discards 0
	Out: ARP requests 0, ARP responses 0
	

Meaning

Table 6 lists the output fields of the show interfaces gigabitEthernet command.

Table 6: show interfaces gigabitEthernet Output Fields

Field Name

Field Description

GigabitEthernet or tenGigabitEthernet interfaceSpecifier

Status of the hardware on this interface:

  • up—Hardware is operational
  • down—Hardware is not operational

Administrative status

Operational state that you configured for this interface:

  • up—Interface is enabled
  • down—Interface is disabled

Hardware

Type of MAC device on this interface

Address

MAC address of the processor on this interface

MAU

Type of MAU on the primary and secondary physical ports:

  • SFP—1000BASE-LH, 1000BASE-SX, 1000BASE-ZX; for SFPs that are empty, SFP (Empty) appears in this field; for SFPs that are installed in the OC3-2 GE APS I/O module and do not have a Juniper Networks part number programmed, SFP (GE Compliant) appears in this field
  • XFP—10GBASE-SR (10 Gbps), 10GBASE-LR (10 Gbps), 10GBASE-ER (10 Gbps); for XFPs that are empty, XFP (Empty) appears in this field

TX Output Power

Transmitted output optical power

RX Input Power

Received input optical power

MTU

Size of the MTU for this interface:

  • Operational—Size of the largest packet processed
  • Administrative—Setting for MTU size that you specified

Duplex Mode

Duplex option for this interface:

  • Operational—Duplex option currently used
  • Administrative—Setting for duplex that you specified

Speed

Line speed for this interface:

  • Operational—Current rate at which packets are processed
  • Administrative—Setting for line speed that you specified

Debounce

Debounce configuration for this interface:

  • State is—Enabled, Disabled
  • Interval is—Number of seconds that this interface maintains a given state before the state change is reported to the upper-layer links

Clear arp

State of the removal of the ARP entries on an interface with redundant ports:

  • Enabled—Clears ARP entries on the interface when the primary link fails
  • Disabled—Maintains ARP entries on the interface until the specified timeout elapses

Link

Link information for this interface:

  • Operational Link Selected—Port that the I/O module is currently using: primary or secondary
  • Administrative link selected—Port that the I/O module is configured to use:
    • primary—Only primary port is configured to operate
    • secondary—Only redundant port is configured to operate
    • automatically—Software controls port redundancy automatically

Link Failover Timeout

Time to wait for a failed link to be active before the router uses a different active link

Primary link selected x times

Number of times that the I/O has used the primary port since the module was last rebooted

Secondary link selected x times

Number of times that the I/O has used the secondary port since the module was last rebooted`

Primary/Secondary link signal detected, Primary/Secondary link signal not detected

Specifies the port (primary or secondary) on which the router detects a signal (not displayed on GE I/O modules that do not support SFPs)

5 minute input rate

Data rates based on the traffic received in the last 5 minutes

5 minute output rate

Data rates based on the traffic sent in the last 5 minutes

In

Analysis of inbound traffic on this interface:

  • Bytes—Number of bytes received in error-free packets
  • Unicast—Number of unicast packets received
  • Multicast—Number of multicast packets received
  • Broadcast—Number of broadcast packets received
  • Errors—Total number of errors in all received packets; some packets might contain more than one error
  • Discards—Total number of discarded incoming packets
  • Mac Errors—Number of incoming packets discarded because of MAC sublayer failures
  • Alignment—Number of incomplete octets received
  • CRC—Number of packets discarded because the checksum that the router computed from the data does not match the checksum generated by the originating devices
  • Too Longs—Number of packets discarded because the size exceeded the MTU
  • Symbol Errors—Number of symbols received that the router did not correctly decode

Out

Analysis of outbound traffic on this interface:

  • Bytes—Number of bytes sent
  • Unicast—Number of unicast packets sent
  • Multicast—Number of multicast packets sent
  • Broadcast—Number of broadcast packets sent
  • Errors—Total number of errors in all transmitted packets; note that some packets might contain more than one error
  • Discards—Total number of discarded outgoing packets
  • Mac Errors—Number of outgoing packets discarded because of MAC sublayer failures
  • Deferred—Number of packets that the router delayed sending because the line was busy. In half duplex mode, a high number of deferrals means the link is very busy with traffic from other stations. In full duplex mode, when the link is always available for transmission, this number is zero.
  • No Carrier—Number of packets sent when carrier sense was unavailable

Collisions

Analysis of the collisions that occurred:

  • Single—Number of packets sent after one collision
  • MultipleNumber of packets sent after multiple collisions
  • LateNumber of packets aborted during sending because of collisions after 64 bytes
  • ExcessiveNumber of packets not sent because of too many collisions

Policed Statistics

Number of packets that exceeded the number allowed and were policed (or dropped)

ARP Statistics

Analysis of ARP traffic on this interface; In fields are for traffic received on the interface and Out fields are for traffic sent on the interface:

  • ARP requests—Number of ARP requests
  • ARP responses—Number of ARP responses
  • Errors—Total number of errors in all ARP packets
  • Discards—Total number of discarded ARP packets

Administrative qos-shaping-mode

QoS shaping mode:

  • disabled—Shaping mode is configured but not operational
  • frame—Statistics are reported about bytes in frames, such as transmitted bytes and dropped bytes.
  • cell—Shaping mode for shaping and policing rates is cell-based; resulting traffic stream conforms exactly to the policing rates configured in downstream devices. Reports statistics in bytes in cells and accounts for cell encapsulation and padding overhead.
  • none—Shaping mode is not configured

Operational qos-shaping-mode

Actual shaping mode for the interface:

  • disabled
  • frame
  • cell
  • none

queue

Hardware packet queue associated with the specified traffic class and interface:

  • traffic class—Name of traffic class
  • bound to—Interface to which queue is bound
  • Queue length—Length of the queue, in bytes
  • Forwarded packets, bytes—Number of packets and bytes that were forwarded on this queue
  • Dropped committed packets, bytes—Number of committed packets and bytes that were dropped
  • Dropped conformed packets, bytes—Number of conformed packets and bytes that were dropped
  • Dropped exceeded packets, bytes—Number of exceeded packets and bytes that were dropped

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