3Com Router User Manual

Configure Frame Relay QoS267
Configure Frame Relay 
DE Rule List
1Configure a DE rule list
Perform the following configurations in system view.
Ta b l e 307   Configure a DE rule list
By default, no DE rule list is defined.
A router can support up to 10 DE rule lists, and each of them can contain up to 
100 DE rules.
The commands fr del inbound-interface and fr del protocol can be used 
to add multiple rules to a DE rule list. The commands 
undo fr del 
inbound-interface
 and undo fr del protocol can...

268CHAPTER 17: CONFIGURING FRAME RELAY
By default, the queue type of a Frame Relay PVC is FIFO.
When the congestion management is enabled on Frame Relay PVCs, the queue 
type on the interface can only be FIFO. 
For the configuration of PQ, CQ and WFQ, refer to the part of  QoS.
2Configure Frame Relay Interface Queueing
The user can configure four queueing types on a Frame Relay interface:.FIFO, PQ, 
CQ and WFQ. All of them are the queues owned by a general QoS. For their 
configurations, refer to the...

Configure Frame Relay over Other Protocols269
Configure Frame Relay 
over Other Protocols
Frame Relay over IPIP networks are used to carry the Frame Relay data to interconnect the Frame 
Relay networks. In the technique of Frame Relay over IP, a GRE tunnel is 
established between the Frame Relay networks at both ends of IP, and the Frame 
Relay data are carried over IP. The application of Frame Relay over IP is illustrated in 
the following figure: 
Figure 88   Typical application of Frame Relay over IP...

270CHAPTER 17: CONFIGURING FRAME RELAY
After configuring the Frame Relay route through the fr dlci-switch interface 
tunnel
 command, two routes will be added to the Frame Relay routing table on 
the router. One route takes the tunnel interface as the incoming interface and the 
serial interface as the outgoing interface. On the contrary, the other route takes 
the serial interface as the incoming interface and the tunnel interface as the 
outgoing interface.
After the Frame Relay route is configured...

Configure Frame Relay over Other Protocols271
■The DCE device identifies the calling number of the incoming call and 
authenticates the DTE device according to it to determine whether to accept or 
deny the call.
■If the DTE device passes the authentication, it can establish a B channel to the 
DCE device for carrying out the Frame Relay communications.
Normally, if a DCE device is connected to multiple DTE devices, calls can only be 
originated from the DTE side. However, it is not the case for...

272CHAPTER 17: CONFIGURING FRAME RELAY
A DCE device provides Frame Relay switching. Its one end is connected to a 
DTE device via ISDN, and the other end is directly connected to another DTE 
device, as shown in the following figure:
Figure 91   Frame Relay switching connection between DTE devices
The DCE device cannot originate a call, since the PVC segment that the DCE 
device establishes via ISDN can only be activated through dialing. The call can 
only be originated by the DTE device, which is...

Configure Frame Relay over Other Protocols273
2Configuration Related to Frame Relay Switching
Only some simple Frame Relay switching configurations are covered in this section. 
For other configurations, refer to the Link Layer Protocol.
Configure the commands fr switch and fr switching in system view, and 
perform other configurations in synchronous serial interface view.
Ta b l e 314   Configure the commands related to Frame Relay switching
In addition to Frame Relay switching connections between...

274CHAPTER 17: CONFIGURING FRAME RELAY
In the legacy BDR implementation of Frame Relay over ISDN, a dialer interface and 
all the ISDN physical interfaces (including BRI and PRI interfaces) attached to it will 
be Configured with Frame Relay.
■Adopt dialer profiles
In the dialer profiles implementation of Frame Relay over ISDN, the dialer 
number 
command must be configured, besides using the link-protocol fr 
command to change the link layer protocol on the interface. The configuration 
is necessary...

Display and debug Frame Relay275
Display Frame Relay data receiving/sending 
statistics information.display fr statistics [ 
interface type number ]
Display the Frame Relay PVC statisticsdisplay fr pvc-info [ serial 
number ] [ dlci dlci-number ]
Display Frame Relay PVC route tabledisplay fr dlci-switch
Display Frame Relay switch PVC route tabledisplay fr switch-table
Display Frame Relay protocol status of each 
interfacedisplay fr interface
Display statistics information of Frame Relay 
inverse address...

276CHAPTER 17: CONFIGURING FRAME RELAY
Typical Frame Relay 
Configuration 
Example
Interconnect LANs via 
Frame Relay NetworkI. Networking Requirement
Interconnect LANs via the public Frame Relay network. The router work as user 
equipment in the Frame Relay DTE mode. The routers use static address mapping.
II. Networking Diagram
Figure 92   Interconnect LANs via Frame Relay network
III. Configuration Procedure
1Configure Router A:
aConfigure interface IP address
[Router]interface serial 1...