3Com Router User Manual

							Typical Frame Relay Configuration Example277
[Router-Serial1] ip address 202.38.163.253 255.255.255.0
bConfigure the link layer protocol of the interface to Frame Relay
[Router-Serial1]link-protocol fr
[Router-Serial1]fr interface-type dte
cConfigure static address mapping
[Router-Serial1]fr map ip 202.38.163.251 dlci 80
Interconnect LANs via 
Private LineI. Networking Requirement
Two Routers are directly connected via a serial port. Router A works in the Frame 
Relay DCE mode, and Router B works in the Frame Relay DTE mode. The router 
use dynamic address mapping.
II. Networking Diagram
Figure 93   Interconnect LANs via private line
III. Configuration Procedure
1Configure Router A:
aConfigure interface IP address
[Router]interface serial 1
[Router-Serial1]ip address 202.38.163.251 255.255.255.0
bConfigure the link layer protocol of the interface to Frame Relay
[Router-Serial1]link-protocol fr
[Router-Serial1]fr interface-type dce
cConfigure local virtual circuit
[Router-Serial1]fr dlci 100
2Configure Router B:
aConfigure interface IP address
[Router]interface serial 1
[Router-Serial1]ip address 202.38.163.252 255.255.255.0
bConfigure the link layer protocol of the interface to Frame Relay
[Router-Serial1]link-protocol fr
[Router-Serial1]fr interface-type dte
Connect Routers 
through Multilink Frame 
Relay (FRF.16)I. Networking Requirements
RouterA and RouterB are directly connected via the serial ports Serial 0 and Serial1 
and through Frame Relay protocol. The two serial ports are bundled together to 
provide wider bandwidth.
IP:202.38.163.251 IP:202.38.163.252
DLCI=100Router A Router B 
						

							278CHAPTER 17: CONFIGURING FRAME RELAY
II. Networking Diagram
Figure 94   MFR bundle networking
III. Configuration Procedure
1Configure RouterA
aCreate a MFR interface.
[Router]interface mfr 0
[Router-MFR0]ip address 202.38.163.251 255.255.255.0
[Router-MFR0]fr interface-type dte
[Router-MFR0]fr dlci 100
[Router-MFR0]fr map ip 202.38.163.252 dlci 100
bBundle Serial 0 and Serial 1 to mfr 0.
[Router]interface serial 0
[Router-Serial0]link-protocol fr mfr 0
[Router]interface serial 1
[Router-Serial0]link-protocol fr mfr 0
2Configure RouterB
aCreate a MFR interface.
[Router]interface mfr 0
[Router-MFR0]ip address 202.38.163.252 255.255.255.0
[Router-MFR0]fr interface-type dte
[Router-MFR0]fr dlci 100
[Router-MFR0]fr map ip 202.38.163.251 dlci 100
bBundle Serial 0 and Serial 1 to mfr 0.
[Router]interface serial 0
[Router-Serial0]link-protocol fr mfr 0
[Router]interface serial 1
[Router-Serial0]link-protocol fr mfr 0
Frame Relay Compress 
Typical Configuration 
Example (FRF.9)I. Networking Requirements
Router A and Router B are connected via a Frame Relay network. To  i m p r o v e  t h e  
efficiency of data transmission, Frame Relay payload compression is used between 
them.
I P: 202. 38. 163. 251I P: 202. 38. 163. 252
S0
S1 S1S0
bundl e
RouterA RouterB 
						

							Typical Frame Relay Configuration Example279
II. Networking Diagram
Figure 95   networking diagram of Frame Relay over IP
III. Configuration Procedure
1Configure Router A
[Router]interface serial 0
[Router-Serial0]ip address 202.38.163.251 255.255.255.0
[Router-Serial0]fr interface-type dte
[Router-Serial0]fr dlci 100
[Router-Serial0]fr map ip 202.38.163.252 dlci 100 compression frf9
2Configure Router B
You can configure Router B in the same way as that of Router A, so its 
configuration will not be mentioned here.
 
Typical Frame Relay 
Fragment Example 
(FRF.12)I. Networking Requirements
RouterA and Router B connect with Frame Relay Network. and enable Frame Relay 
Fragment between them.
II. Networking Diagram
Figure 96   networking diagram of Frame Relay Fragment
III. Configuration Procedure
1Configure RouterA
[Router]interface serial0
[Router-Serial0]link-protocol fr
[Router-Serial0]ip address 10.1.1.2 255.0.0.0
[Router-Serial0] fr dlci 16 
[Router-fr-dlci-16]fr-class frts 
[Router]fr class frts
[Router-fr-class-frts]cir allow 64000
[Router-fr-class-frts]cbs 64000
[Router-fr-class-frts]cir 64000
[Router-fr-class-frts]fragment 80 data-level
2Configure RouterB
[Router]interface serial0
[Router-Serial0]link-protocol fr
[Router-Serial0]ip address 10.1.1.1 255.0.0.0
[Router-Serial0]fr dlci 16 
[Router-fr-dlci-16]fr-class frts
[Router]fr class frts
IP:202.38.163.251 IP:202.38.163.252
S0 S0Frame Relay
Network
Router A
Router B
 Router A  Router B
Frame RelayS0S0 
						

							280CHAPTER 17: CONFIGURING FRAME RELAY
[Router-fr-class-frts]cir allow 64000 64000
[Router-fr-class-frts]cbs 64000
[Router-fr-class-frts]cir 64000
[Router-fr-class-frts]fragment 80 data-level
Configuration Example 
of Frame Relay Traffic 
ShapingI. Configuration Requirements
The Router is connected to the Frame Relay network via the interface Serial 0. It is 
required that the average transmit rate of the router should be 96 kbps, the 
maximum transmit rate should be 128 kbps, and the minimum transmit rate 
should be 32 kbps, and at the same time, the router should own the function of 
adaptive traffic adjustment. In addition, PQ is required to be adopted to ensure 
that all the IP packets from the segment 10.0.0.0 will pass first.
II. Networking Diagram
Figure 97   Networking diagram of Frame Relay traffic shaping
III. Configuration Procedure
1Define priority queue Group 1, and request all the IP packets from the segment 
10.0.0.0 can pass first.
[Router]acl 1
[Router-acl-1]rule normal permit source 10.0.0.0 0.0.0.0
[Router]qos pql 1 protocol ip acl 1 queue top
2Create a Frame Relay class and configure the parameters of Frame Relay traffic 
shaping.
[Router]fr class 96k
[Router-fr-class-96k]cir allow 96000
[Router-fr-class-96k]cir 32000
[Router-fr-class-96k]cbs 96000
[Router-fr-class-96k]ebs 32000
[Router-fr-class-96k]traffic-shaping adaptation becn 
[Router-fr-class-96k]pq pql 1
3Configure the interface Serial 0 and enable the Frame Relay traffic shaping.
[Router]interface serial 0
[Router-Serial0]link-protocol fr
[Router-Serial0]ip address 1.1.1.1 255.255.255.0
[Router-Serial0]fr traffic-shaping
4Create a Frame Relay PVC and associate the Frame Relay class with it.
[Router-Serial0]fr dlci 16
[Router-fr-dlci-16]fr-class 96K
Typical Frame Relay over 
IP Configuration 
ExampleI. Networking Requirements
Two Frame Relay networks are interconnected via RouterA and RouterB, which are 
connected via an IP network. Enable Frame Relay over IP on the two routers to 
interconnect these two Frame Relay networks over the IP network.
Quidway
DTES0
Frame Relay
Network
CIR ALLOW = 96kbps
EIR = 32kbps
CIR = 32kbpsRouter 
						

							Typical Frame Relay Configuration Example281
II. Networking Diagram
Figure 98   Networking diagram of Frame Relay over IP
III. Configuration Procedure
1Configure RouterA
aConfigure the Frame Relay interface Serial0
[Router]interface serial 0
[Router-Serial0]link-protocol fr
[Router-Serial0]fr interface-type dce
[Router-Serial0]fr dlci 100
bConfigure IP interface Ethernet0
[Router]interface ethernet 0
[Router-Ethernet0]ip address 10.110.50.1 255.255.255.0
cConfigure tunnel interface
[Router]interface tunnel 1
[Router-Tunnel1]source 10.110.50.1
[Router-Tunnel1]destination 10.110.50.2
dConfigure Frame Relay over IP
[Router]interface serial 0
[Router-Serial0]fr dlci-switch 100 interface tunnel 1 dlci 200
2Configure RouterB
aConfigure the Frame Relay interface Serial0.
[Router]interface serial 0
[Router-Serial0]link-protocol fr
[Router-Serial0]fr interface-type dce
[Router-Serial0]fr dlci 300
bConfigure IP interface Ethernet0
[Router]interface ethernet 0
[Router-Ethernet0]ip address 10.110.50.2 255.255.255.0
cConfigure tunnel interface
[Router]interface tunnel 1
[Router-Tunnel1]source 10.110.50.2
[Router-Tunnel1]destination 10.110.50.1
dConfigure Frame Relay over IP
[Router]interface serial 0
[Router-Serial0]fr dlci-switch 300 interface tunnel 1 dlci 200
Back-to-back Connection 
through Frame Relay 
over ISDNI. Networking Requirements
RouterA (DTE) and RouterB (DCE) are connected via ISDN. RouterA adopts legacy 
BDR to make calls while RouterB adopts dialer profiles. To establish a PVC, the call 
must be originated from RouterA.
Router A Router B
DLCI 300 DLCI 100 DLCI 200 DLCI 200
E0 E0IP NetworkTunnelFrame Relay
NetworkFrame Relay
Network 
						

							282CHAPTER 17: CONFIGURING FRAME RELAY
On RouterA, two BRI interfaces, Bri0 and Bri1, are available. Bri0 is assigned with 
the ISDN number 660218, the IP address 110.0.0.1 and the DLCI number 100. 
Bri1 is assigned with the ISDN number 660208, the IP address 120.0.0.1 and the 
DLCI number 200. On RouterB, one PRI interface is available for providing services 
for two dialer interfaces. This PRI interface is assigned with the ISDN number 
660045, the IP addresses 110.0.0.2 and 120.0.0.2, and the DLCI numbers 100 
and 200. 
II. Networking Diagram
Figure 99   Networking for the back-to-back connection between DTE and DCE
III. Configuration Procedure
1Configure RouterA
aConfigure the BDR parameters on the interface Bri0
[Router]dialer-rule 1 ip permit
[Router]interface bri 0
[Router-Bri0]link-protocol fr
[Router-Bri0]ip address 110.0.0.1 255.255.255.0
[Router-Bri0]dialer enable-legacy
[Router-Bri0]dialer-group 1
[Router-Bri0]dialer number 660045
bConfigure the Frame Relay parameters on Bri0.
[Router-Bri0]fr map ip 110.0.0.2 dlci 100
[Router-Bri0]fr dlci 100
For configuring the BDR and Frame Relay parameters on Bri1, refer to the 
configuration on Bri0. The user only needs to change the IP address to 120.0.0.1, 
DLCI number to 200, and address mapping to static address mapping. 
2Configure RouterB
aConfigure BDR and Frame Relay parameters on the PRI interface.
[Router]dialer-rule 1 ip permit
[Router]fr switching
[Router]controller e1 0
[Router-E1-0]pri-set
[Router]interface dialer 0
[Router-Dialer0]ip address 110.0.0.2 255.255.255.0
[Router-Dialer0]dialer bundle 10
[Router-Dialer0]dialer-group 1
[Router-Dialer0]dialer number 660218
[Router-Dialer0]dialer call-in 660218
[Router-Dialer0]link-protocol fr
[Router-Dialer0]fr interface-type dce
[Router-Dialer0]fr dlci 100
[Router]interface serial 2:15
[Router-Serial2:15]undo dialer enable-legacy
[Router-Serial2:15]dialer bundle-member 10
ISDN
Switch
Router B Router ADTE
DCE
Bri0
Bri1Pri 660218
660208660045 
						

							Typical Frame Relay Configuration Example283
[Router-Serial2:15]dialer bundle-member 20
For configuring the BDR and Frame Relay parameters on Dialer1, refer to the 
configuration on Dialer0. The user only needs to change the IP address to 
120.0.0.2, DLCI number to 200, and configure to receive the incoming calls from 
the number 660208 and assign Dialer1 to Dialer Bundle 20.
Frame Relay Switching 
Connection through 
Frame Relay over ISDNI. Networking Requirements
RouterB (DCE) is connected to the ISDN interface on RouterA (DTE) via ISDN at one 
side and RouterC (DTE) via the serial interface at another side. With the Frame 
Relay switching function of DCE, routers can interwork across ISDN. RouterA 
adopts legacy BDR to make calls while RouterB adopts dialer profiles. To establish 
a PVC, the call must be originated from RouterA.
On RouterA, two BRI interfaces, Bri0 and Bri1, are available. Bri0 is assigned with 
the ISDN number 660218, the IP address 110.0.0.1 and the DLCI number 100. 
Bri1 is assigned with the ISDN number 660208, the IP address 120.0.0.1 and the 
DLCI number 200. On RouterB, one PRI interface is available for providing services 
for two dialer interfaces. This PRI interface is assigned with the ISDN number 
660045, and the DLCI numbers 100 and 200 respectively for these two dialer 
interfaces. At the same time, RouterB is connected to RouterC via a serial 
interface, which is assigned with the DLCI numbers 300 and 400. The serial 
interface on RouterC is available with 2 sub-interfaces, which are respectively 
assigned with the IP addresses 110.0.0.2 and 120.0.0.2, and DLCI numbers 300 
and 400.
II. Networking Diagram
Figure 100   Networking for the Frame Relay switching connection between DTE devices
III. Configuration Procedure
1Configure RouterA
aConfigure the BDR-related parameters on Bri0.
[Router]dialer-rule 1 ip permit
[Router]interface bri 0
[Router-Bri0]link-protocol fr
[Router-Bri0]ip address 110.0.0.1 255.255.255.0
[Router-Bri0]dialer enable-legacy
[Router-Bri0]dialer-group 1
[Router-Bri0]dialer number 660045
bConfigure the Frame Relay-related parameters on Bri0.
[Router-Bri0]fr map ip 110.0.0.2 dlci 100
[Router-Bri0]fr dlci 100
For configuring the BDR and Frame Relay parameters on Bri1, refer to the 
configuration on Bri0. The user only needs to change the IP address to 120.0.0.1, 
DLCI number to 200, and address mapping to static address mapping.
ISDN
Switch
Router B Router ADTE DCE
Bri0
Bri1Pri 660218
660208660045DTE
Router C S1S1 
						

							284CHAPTER 17: CONFIGURING FRAME RELAY
2Configure RouterB
aConfigure the BDR and Frame Relay parameters on the PRI interface.
[Router]dialer-rule 1 ip permit
[Router]fr switching
[Router]controller e1 0
[Router-E1-0]pri-set
[Router]interface dialer 0
[Router-Dialer0]ip address 110.0.0.2 255.255.255.0
[Router-Dialer0]dialer bundle 10
[Router-Dialer0]dialer-group 1
[Router-Dialer0]dialer number 660218
[Router-Dialer0]dialer call-in 660218
[Router-Dialer0]link-protocol fr
[Router-Dialer0]fr interface-type dce
[Router-Dialer0]fr dlci 100
[Router]interface serial 2:15
[Router-Serial2:15]undo dialer enable-legacy
[Router-Serial2:15]dialer bundle-member 10
[Router-Serial2:15]dialer bundle-member 20
For configuring the BDR and Frame Relay parameters on Dialer1, refer to the 
configuration on Dialer0. The user only needs to change the IP address to 
120.0.0.2, DLCI number to 200, and configure to receive the incoming calls from 
the number 660208 and assign Dialer1 to Dialer Bundle 20.
bConfigure the Frame Relay switching parameters on Serial1.
[Router-Serial1]link-protocol fr
[Router-Serial1]fr interface-type dce
[Router]interface serial 1.1
[Router-Serial1.1]ip address 130.0.0.1 255.255.255.0
[Router-Serial1.1]fr dlci 300
[Router]interface serial 1.2
[Router-Serial1.2]ip address 140.0.0.1 255.255.255.0
[Router-Serial1.2]fr dlci 400
cConfigure Frame Relay SVCs.
[Router]fr switch myconnect1 interface dialer 0 dlci 100 interface 
serial 1 dlci 300
[Router]fr switch myconnect2 interface dialer 1 dlci 200 interface 
serial 1 dlci 400
3Configure RouterC
aConfigure IP addresses and DLCI numbers for the serial interface and 
sub-interfaces.
[Router]interface serial 1
[Router-Serial1] link-protocol fr
[Router]interface serial 1.1
[Router-Serial1.1]ip address 130.0.0.2 255.255.255.0
[Router-Serial1.1]fr dlci 300
[Router]interface serial 1.2
[Router-Serial1.2]ip address 140.0.0.2 255.255.255.0
[Router-Serial1.2]fr dlci 400 
						

							Fault Diagnosis and Troubleshooting of Frame Relay285
Fault Diagnosis and 
Troubleshooting of 
Frame RelayFault 1: the physical layer in DOWN status.
Troubleshooting:
■Check whether the physical line is normal.
■Check whether the opposite equipment runs normally.
Fault 2: the physical layer is already UP, but the link layer protocol is 
DOWN.
Troubleshooting:
■Check whether both local equipment and opposite equipment have been 
configured with Frame Relay protocol.
■If two sets of equipment are directly connected, check the local equipment and 
opposite equipment to see whether one end is configured as Frame Relay DTE 
interface and the other end as Frame Relay DCE interface.
■Turn on the monitoring switch for the Frame Relay LMI packet to see whether 
the Status Enquiry packets correspond to the Status packet. If not, it indicates 
the physical layer data is not receiving or sending correctly. Check the physical 
layer. Command 
debugging fr lmi-info is used to turn on the monitoring 
switch for Frame Relay LMI information.
Fault 3: link layer protocol is UP, but cannot Ping through the peer.
Troubleshooting:
■Check whether the link layer protocols of the equipment at both ends are UP.
■Check whether the equipment at both ends have configured (or created) 
correct address mapping for the peer.
■Check the route table to see whether there is a route to the peer.
Fault 4: After the Frame Relay traffic shaping is enabled on the Frame 
Relay interface, the small-sized packets can be pinged, but the large-sized 
packets cannot.
Troubleshooting:
■Configuring a too small committed burst size (CBS) will probably cause this 
phenomenon. In common conditions, CBS cannot be less than 12000 bits. If it 
is configured too small, the large packets will probably fail to be transmitted.
■Check the configurations of the Frame Relay class associated with the Frame 
Relay interface or the PVCs, and use the fr cbs command to make the CBS 
larger.
Fault 4: Frame Relay data cannot be transmitted across ISDN.
Troubleshooting:
■Check whether BDR has been correctly configured. Read the section of 
troubleshooting in Dial-up.
■Use the debugging dialer event command to enable BDR event debugging. 
If “BDR: Bind failed with more than one profile” is displayed, it means that the 
dialer number command has been configured repeatedly at the receiving 
end. In this case, make sure that this command is uniquely configured at the 
receiving end. 
						

							286CHAPTER 17: CONFIGURING FRAME RELAY
■Check whether the Frame Relay configurations at both ends are correct. Read 
the section of troubleshooting in Link Layer Protocol.