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# Monitoring 802.3ad Link Aggregation

This section explains how to use the show commands to display the characteristics and the configured settings for 802.3ad link aggregation.

| Note: The E120 router and E320 router 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).

show interfaces lag

- Use to display information about a specified Ethernet member link in an IEEE 802.3ad link aggregation group (LAG) bundle.
- Specify either the Fast Ethernet or Gigabit Ethernet interface type when issuing this command:
  `
  host1(config):show interfaces interfaceType interfaceSpecifier lag
  `
- Field descriptions
  - 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
  - Member—Membership status of the Ethernet link
  - LACP—Status of LACP configuration for the Ethernet link
    - active—Ethernet link participates in the protocol regardless of whether its Partner member link is set to active or passive LACP PDU participation
    - passive—Ethernet link transmits LACP PDUs only when it receives LACP PDUs from its Partner member link
  - mux state—Status of collecting and distributing at the Mux state machine
    - collecting/distributing—Ethernet link is actively collecting incoming frames and distributing outgoing frames
    - detached—Ethernet link is detached from the LAG bundle due to protocol changes or system constraints
    - waiting—Ethernet link is waiting to attach to a LAG bundle
  - LACP state
    - active—Actor link actively particulates in LACP
    - passive—Actor link transmits LACP PDUs
    - timeout—Timeout control value; this value is not configurable and is set to long timeout (30 seconds)
    - aggregatable—Actor link can be aggregated
    - individual—Actor link cannot be aggregated; must operate as an individual link
    - in-sync—Actor link has joined the correct LAG bundle
    - out-of-sync—Actor link is unable to join the correct LAG bundle
    - collecting—Actor link is actively collecting incoming frames; if this field does not appear, the Actor link is not actively collecting incoming frames
    - distributing—Actor link is actively distributing outgoing frames; if this field does not appear, the Actor link is not actively distributing outgoing frames
    - defaulted—Actor link is using defaulted operational information about the Partner link that was administratively configured for Partner; if this field does not appear, the operational information about the Partner link has been received by the Actor link in an LACP PDU
    - expired—Actor link’s receive machine is expired; if this field does not appear, the Actor link’s receive machine is active
  - port—Port number assigned to the Ethernet link by the Actor link
  - priority—Priority assigned to this Ethernet link by the Actor link
  - Key—Operational key value assigned to the Ethernet link by the Actor link
  - System Priority—Priority assigned to the Ethernet link by the system
  - System MAC Address—MAC address assigned to the Actor link
  - Partner—Status of the Partner link
    - active— Partner link participates in the LACP
    - passive—Partner link transmits LACP PDUs
    - timeout—Timeout control value; short timeout or long timeout
    - aggregatable—Partner link can be aggregated
    - individual—Partner link cannot be aggregated
    - in-sync—Partner link has joined the correct LAG bundle
    - out-of-sync—Partner link has joined the incorrect LAG bundle
    - collecting—Partner link is actively collecting incoming frames; if this field does not appear, the Partner link is not actively collecting incoming frames
    - distributing—Partner link is actively distributing outgoing frames; if this field does not appear, the Partner link is not actively distributing outgoing frames
    - defaulted—Partner link is using defaulted operational information about the Partner link that was administratively configured for Partner; if this field does not appear, the operational information about the Partner link has been received by the Actor link in an LACP PDU
    - expired—Partner link’s receive machine is expired; if this field does not appear, the Partner link’s receive machine is active
    - port—Port number assigned to the Ethernet link by the Partner link
    - priority—Priority assigned to the Ethernet link by the Partner link
    - key—Operational key value assigned to the Ethernet link by the Partner link
    - age—Number of seconds since last LACP was received
    - System Priority—Priority assigned to the Ethernet link by the Partner link’s system
    - System MAC Address—MAC address assigned to the Partner link by the system
  - LACP packets—Number of transmitted and received LACP packets
  - Marker Protocol request packets—Number of Marker Protocol packets requested to verify transmissions
  - Marker Protocol response packets—Number of Marker Protocol response packets that verified transmissions
  - Discarded—Number of invalid LACP packets
- Example

      host1#show interfaces fastEthernet 4/0 lag
      FastEthernet4/0 is Up, Administrative status is Up
       Member of Lag boston
       LACP passive, mux state collecting/distributing
       LACP state (0x3c) passive, long timeout, aggregatable, in-sync, collecting, distributing
       port 0 priority 32768 key 8
       System Priority 32768 System MAC Address is 0090.1a40.2043
       Partner: state (0x3d) active, short timeout, aggregatable, in-sync,
      collecting, distributing
        port 0 priority 32768 key 8 age 25
        System Priority 32768 System MAC Address is 0090.1a40.2043

       LACP packets: received 8, transmitted 7
       Marker Protocol request packets: received 0, transmitted 0
       Marker Protocol response packets: received 0, transmitted 0
       Discarded 0, unknown protocol received 0

- See show interfaces lag.

show interfaces lag members

- Use to display information about the Ethernet member links in all IEEE 802.3ad link aggregation group (LAG) bundles configured on the router, or about the member links in a specified IEEE 802.3ad LAG bundle.
- Field descriptions
  - Lag—Name of the LAG bundle
  - Administrative status—Operational state that you configured for the LAG
  - Configured MinimumLinks—Minimum number of member links are configured for the LAG bundle
  - Member-interface—Status of the member interface in the bundle
    - Interface Specifier—Status of the hardware on this interface (up or down)
    - LACP active—Ethernet link participates in the protocol regardless of whether its Partner member link is set to active or passive LACP PDU participation
    - LACP passive—Ethernet link transmits LACP PDUs only when it receives LACP PDUs from its Partner link
    - collecting/distributing—Ethernet link is actively collecting incoming frames and distributing outgoing frames
    - detached—Ethernet link is detached from the LAG bundle due to protocol changes or system constraints
    - waiting—Ethernet link is waiting to attach to a LAG bundle
- Example

      host1#show interfaces boston lag members

      Lag bostonBundle is Up, Administrative status is Up
      Configured MinimumLinks 2
         Member-interface FastEthernet0/0 is Up
            (LACP active, state collecting/distributing)
         Member-interface FastEthernet0/5 is Up
            (LACP active, state collecting/distributing)

      Lag actonBundle is Up, Administrative status is Up
         Member-interface FastEthernet4/0 is Up
            (LACP passive, state collecting/distributing)
         Member-interface FastEthernet4/6 is Up
            (LACP passive, state collecting/distributing)
      2 lag interfaces found

- See show interfaces lag members.

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