# Monitoring Ethernet Member Links in all IEEE 802.3ad LAG Bundles

#### Purpose

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.

Specify either the Fast Ethernet or Gigabit Ethernet interface type when issuing this command:

host1#show interfaces interfaceType interfaceSpecifier lag members

| 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 routers output also includes information about the adapter identifier in the interface specifier (slot/adapter/port).

#### Action

To display information about the Ethernet member link in an IEEE 802.3ad LAG bundle:

    host1#show interfaces lag members
    Lag lag1 is Up, Administrative status is Up
     MAC Address is 0090.1a42.7568
     MTU: Operational 1518
     Duplex Mode: Operational Full Duplex
     Speed: Operational 4000 Mbps
     System Priority 32768 System MAC Address is 0090.1a42.6273 key 9
     Partner System Priority 32768 System MAC Address is 0090.1a42.6273 key 21

     Configured Redundant Port: GigabitEthernet14/0/3
      Failover Timeout: 1000 mSec Transmitter off Auto revert enabled
      Active Port: GigabitEthernet14/0/3, Failed Port: GigabitEthernet14/0/2
      Last failover at TUE AUG 26 2008 03:17:49.230 UTC Failover count 3
      Last Failed Port: GigabitEthernet14/0/3

       Member-interface GigabitEthernet14/0/0 is Up
          (LACP active, state collecting/distributing)
       Member-interface GigabitEthernet14/0/1 is Up
          (LACP active, state collecting/distributing)
       Member-interface GigabitEthernet14/0/2 is Down
          (LACP active, state detached)
       Member-interface GigabitEthernet14/0/3 is Up
          (LACP active, state collecting/distributing)

#### Meaning

Table 12 lists the show interfaces lag member command output fields.

Table 12: show interfaces lag member Output Fields

Field Name | Field Description
--- | ---
Lag | Name of the LAG bundle
Administrative status | Operational state that you configured for this interface
MAC Address | MAC address of the processor on this interface
System Priority | Priority assigned to the Ethernet link by the system
MTU | Status of LACP configuration for the Ethernet link: Operational—MTU size of the current packet being 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
System MAC Address | MAC address assigned to the Actor link
Partner 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
Failover Timeout | The amount of time between the current link event leading to failover or reversion and the previous link failover or reversion, in the range 100-10000 milliseconds (ms)
Active Port | Port number of the currently active port in the LAG bundle
Failed Port | Port number of the port that encountered a link failure in the LAG bundle
Last failover at | The time at which the last failover from the primary link in the LAG bundle to the secondary link occurred
Last Failed Port | Port number of the last failed interface in 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

#### Related Documentation

- Understanding 802.3ad Ethernet Link Aggregation
- Configuring 802.3ad Link Aggregation
- Monitoring a Specified Ethernet Member Link in an IEEE 802.3ad LAG Bundle
- show interfaces lag
- show interfaces lag members