Technical Documentation

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 1 lists the show interfaces lag member command output fields.

Table 1: 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

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