User's Manual

Avaya Branch Gateway Manager 10.0 Page 358
15-601011 Issue 29r (Friday, November 02, 2012)B5800 Branch Gateway
5.13.3 DLCIs
This tab is only available for Frame Relay records. These show SyncFrameRelay as the Mode on the WAN Port tab.
The tab lists the DLCIs created for the connection. These can be edited using the Add, Edit and Remove buttons.
Usability
· Mergeable: These settings are not mergeable. Changes to these settings will require a reboot of the system.
Configuration Settings
· Frame Link Type: Default = PPP
Data transfer encapsulation method. Set to the same value at both ends of the PVC (Permanent Virtual Channel).
· None
· PPP
Using PPP offers features such as out of sequence traffic reception, compression and link level connection
management.
· RFC 1490
RFC 1490 encapsulation offers performance and ease of configuration and more inter-working with third party CPE.
· RFC1490 + FRF12
Alternate encapsulation to PPP for VoIP over Frame Relay. When selected all parameters on the Service | PPP tab
being used are overridden.
· DLCI: Default = 100
This is the Data Link Connection Identifier, a unique number assigned to a PVC end point that has local significance
only. Identifies a particular PVC endpoint within a user's physical access channel in a frame relay.
· RAS Name
Select the RAS Service you wish to use.
· Tc: Default = 10
This is the Time Constant in milliseconds. This is used for measurement of data traffic rates. The Tc used by the
system can be shorter than that used by the network provider.
· CIR: (Committed Information Rate) Default = 64000 bps
This is the Committed Information Rate setting. It is the maximum data rate that the WAN network provider has
agreed to transfer. The committed burst size (Bc) can be calculated from the set Tc and CIR as Bc = CIR x Tc. For links
carrying VoIP traffic, the Bc should be sufficient to carry a full VoIP packet including all its required headers. See the
example below.
· EIR: (Excess Information Rate) Default = 0 bps
This is the maximum amount of data in excess of the CIR that a frame relay network may attempt to transfer during
the given time interval. This traffic is normally marked as De (discard eligible). Delivery of De packets depends on the
network provider and is not guaranteed and therefore they are not suitable for UDP and VoIP traffic. The excess burst
size (Be) can be calculated as Be = EIR x Tc.
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