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 ms 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 16 lists the show interfaces lag member command output fields.

Table 16: 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