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7.8.1.0 - Force10 Networks

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Figure 288<br />

Far-end Failure Detection<br />

Far-end Failure Detection is supported only on platform:<br />

Far-end Failure Detection (FEFD) is a protocol that senses remote data link errors in a network. It responds<br />

by sending a unidirectional report that triggers an echoed response after a specified time interval.<br />

Figure 289<br />

Configuring Far-end Failure Detection<br />

<strong>Force10</strong>(conf-if-gi-4/0)#show config<br />

!<br />

interface GigabitEthernet 4/0<br />

no ip address<br />

switchport<br />

fefd<br />

no shutdown<br />

<strong>Force10</strong>(conf-if-gi-1/0)#show config<br />

!<br />

interface GigabitEthernet 1/0<br />

no ip address<br />

switchport<br />

R1 fefd<br />

R2<br />

no shutdown<br />

Keep-alive<br />

Interval<br />

2w0d4h : FEFD packet sent via interface Gi 1/0<br />

Sender state -- Bi-directional<br />

Sender info -- Mgmt Mac(00:01:e8:14:89:25), Slot-Port(Gi 1/0)<br />

Peer info -- Mgmt Mac (00:01:e8:14:89:25), Slot-Port(Gi 4/0)<br />

Sender hold time -- 3 (second)<br />

R1 R2<br />

Echo<br />

2w0d4h : FEFD packet sent via interface Gi 4/0<br />

Sender state -- Bi-directional<br />

Sender info -- Mgmt Mac(00:01:e8:14:89:25), Slot-Port(Gi 4/0)<br />

Peer info -- Mgmt Mac (00:01:e8:14:89:25), Slot-Port(Gi 1/0)<br />

Sender hold time -- 3 (second)<br />

Layer2 001<br />

The report consists of several packets in SNAP format that are sent to the nearest known MAC address.<br />

In the event of a far-end failure, the device stops receiving frames, and after the specified time interval<br />

assumes that the far-end is not available. The connecting line protocol is brought down so that upper layer<br />

protocols can detect the neighbor unavailability faster.<br />

FTOS Configuration Guide, version <strong>7.8.1.0</strong> 457

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