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Prestige 1400 WAN Router with Integrated Ethernet Switch
RFC 1973 (PPP in Frame Relay)
RFC 1973 describes the use of Frame Relay for transporting PPP encapsulated packets. Please refer to RFC 1973
for more information.
RFC 1490
RFC 1490 describes Multiprotocol Interconnect over Frame Relay encapsulation which is an encapsulation method
for carrying network interconnect traffic (both bridging and routing) over a frame relay network. It also describes a
simple fragmentation procedure for carrying large frames over a frame relay network with a smaller MTU
(Maximum Transmission Unit).
4.3.2
DLCI
The carrier gives you a DLCI (Data Link Connection Identifier) for each frame relay connection to a destination.
Identifiers can range from 1 to 991 with restrictions as shown in the following table. The default DLCI for the first
connection is 16.
4.3.3
CIR (Committed Information Rate)
The carrier programs virtual circuits into the network between your sites and charges you for a specific level of
service called the committed information rate (CIR). The CIR is basically a guarantee that the carrier will always
have that bandwidth available. The CIR limit for the Prestige is 8Mbps. The sum of CIRs from all channels in a line
cannot exceed 8Mbps due to the processing limit of the P1400 CPU.
4.3.4
EIR (Excess Information Rate)
This is the burst capability of the connection, i.e., the maximum allowable data transfer rate. EIR must be greater
than or equal to the CIR.
4.3.5
How To Configure Frame Relay for Internet Access
Go to Menu 4 - Internet Access Setup, move the cursor to the Edit Frame Relay Options= field, press the
[SPACE BAR] once to display Yes and then press [ENTER] to display Menu 4.2 - Internet Setup Frame Relay
Options shown next.
4-4
Table 4-3 Data Link Connection Identifiers
DLCI
0
Channel Signaling
1-15
Reserved
16 - 991
Frame Relay
USAGE
WAN Port Setup
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Table of Contents
Troubleshooting
