CTC Union FRM220 Manuel d'utilisateur télécharger pdf (Page 17)

3.1.4 802.ah Configuration

<< 802.3ah Status and Configuration >>

<1> 802.3ah Active [ Enable ]

<2> 802.3ah mode [ Active ]

<3> Link Event [ Enable ]

<4> Loop Back [ Enable ]

<5> Loop Back Number [ 10 ]

<6> Loop Back Frame Size[ 1500 ]

<7> Loop Back Test Start

Loop Back Status [ OK ]

This converter supports IEEE 802.3ah, an OAM protocol that operates at Ethernet Layer 2 (Data Link layer). OAM provides mechanisms to

monitor link operation/health and to improve fault isolation. OAM only works point-to-point over the fiber link. In addition to standard 802.3ah

functions like loop back and dying gasp, the 1000M also implements OAM to provide complete provisioning of the remote fiber connected

converter, without using Layer 3 IP protocol. By using OAM, we can remote manage another fiber connected 1000M(S) converter, without IP

addressing. From this menu we can also perform some basic diagnostics, such as loop back test.

To use the OAM functions, the 802.3ah Active setting must be enabled.

The 802.3ah mode is used to configure an OAM pair. In a pair, one unit must be ‘active’, while the other must be ‘passive’. We typically

place the remote converter in ‘passive’ mode and make the local converter ‘active’.

In order to do Loop Back test, the option must be enabled in both converters. This is a non-intrusive test which uses OAM packets and will

not affect normal transmissions. The number of OAM frames used (the number of times the loop back is done) is set by the Loop Back

Number.

The Loop Back Frame Size controls the packet size of the OAM frames used for loop back testing. The default is 1500 bytes.

The Loop Back Test Start item is just what it says. Use the “7” key to toggle the test on and off. The result of the test will be shown as

either “OK” (pass) or “Fail”.

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CTC Union FRM220 Manuel d'utilisateur Page 17