Fefd State Changes - Dell Force10 Z9000 Configuration Manual

Figure 24-10. Configuring Far-end Failure Detection
R1
2w0d4h : FEFD packet sent via interface Gi 1/0
Sender state -- Bi-directional
Sender info -- Mgmt Mac(00:01:e8:14:89:25), Slot-Port(Gi 1/0)
Peer info -- Mgmt Mac (00:01:e8:14:89:25), Slot-Port(Gi 4/0)
Sender hold time -- 3 (second)
R1
The report consists of several packets in SNAP format that are sent to the nearest known MAC address.
In the event of a far-end failure, the device stops receiving frames, and after the specified time interval,
assumes that the far-end is not available. The connecting line protocol is brought down so that upper layer
protocols can detect the neighbor unavailability faster.

FEFD state changes

FEFD has two operational modes, Normal and Aggressive. When Normal mode is enabled on an interface
an a far-end failure is detected, no intervention is required to reset the interface to bring it back to an FEFD
operational state.When Aggressive mode is enabled on an interface in the same state, manual intervention
is required to reset the interface.
FEFD enabled systems (comprised of one or more interfaces) will automatically switch between four
different states: Idle, Unknown, Bi-directional, and Err-disabled.
| Layer 2
536
FTOS(conf-if-gi-4/0)#show config
!
interface GigabitEthernet 4/0
no ip address
switchport
fefd
FTOS(conf-if-gi-1/0)#show config
no shutdown
!
interface GigabitEthernet 1/0
no ip address
switchport
fefd
no shutdown
Keep-alive
Interval
2w0d4h : FEFD packet sent via interface Gi 4/0
Sender state -- Bi-directional
Sender info -- Mgmt Mac(00:01:e8:14:89:25), Slot-Port(Gi 4/0)
Peer info -- Mgmt Mac (00:01:e8:14:89:25), Slot-Port(Gi 1/0)
Sender hold time -- 3 (second)
R2
R2
Echo
Layer2 001