ADTRAN 850 Bedienungsanleitung PDF herunterladen (Seite 28)

61200375L1-1

TA 850

TA 850 SDSL RCU UIG/61200377L1-31A

Page 28 of 76

Frame Relay/Polling Frequency

This parameter is the interval that the TA 850 polls the Frame Relay switch using the maintenance protocol

selected above. The TA 850 is required to poll the Frame Relay switch periodically to determine whether

the link is active. The value is in seconds and ranges from 5 to 30 seconds with a default of 10 seconds.

Frame Relay/DLCI Mapping

This menu allows each DLCI to be mapped to a particular Frame Relay maintenance protocol. Each proto-

col parameter can be individually configured for each DLCI. By factory default, the DLCI map is empty.

When empty and a maintenance protocol other than static is used, the TA 850 will poll the switch to deter-

mine which DLCIs are active. These active DLCIs will attempt to determine the IP and IPX addresses on

the other end of the virtual circuit using Inverse ARP (IARP). If there is a response, the network learned will

be added to the router tables and the virtual circuit will be treated as an unnumbered interface. Bridge con-

nections are made using bridge group 1.

When more than one DLCI mapping is listed, the TA 850 will try to match the DLCIs learned from the

Frame Relay switch with the DLCI values in the map. If there is a match, the protocols specified in the map

are used. However, if an active DLCI is not in the list, it looks for an entry that has 0 in the DLCI field. This

entry is considered the default entry to use when no match occurs. If this default entry is not present, the TA

850 falls back to using IARP (as discussed in the previous paragraph) to determine the protocols to use with

that particular virtual circuit. If a static maintenance protocol is used, at least one DLCI mapping must be

specified.

DLCI Mapping/Active

When this parameter is set to Yes (def), the mapping is used to determine the protocols used. If set to

No, the TA 850 will ignore the virtual circuit with this DLCI.

DLCI Mapping/DLCI

This is the DLCI associated with this virtual circuit. This value can range from 16 to 1007.

DLCI Mapping/IP Map

This menu represents the IP protocol mapping that is to take place for this DLCI.

TATIC

This should be selected when there is no Frame Re-

layswitchinthecircuit. TheDLCIsareassignedin

the DLCI Mapping and must be the same for the de-

vice it will communicate with.

To insert a new profile, press the

key when over the Num column. A new inserted profile will

always be set up with the default parameters. To copy parameters from an old profile to this newly

inserted profile, use the copy (

) and paste (

) keys. Entire configuration trees can be copied with

this method.

To delete an unused profile, use the

key when the cursor is over the number in the Num column.

Once deleted, the profile is gone permanently as soon as the DLCI Mapping is saved. Items may be

deleted when DEL appears below the status bar.

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