LAB: Frame Relay Back to Back

Requirements: 1 multipoint & total of 2 subinterfaces

R7

int s0/0/0

encapsulation frame

ip address 200.200.200.7 255.255.255.0

clockrate 128000

no shut

R8

int s0/0/0

encapsulation frame

ip address 200.200.200.8 255.255.255.0

no shut

note: on older version of software the interface is up/down, new version is up/up its already configured clockrate. i.e. not using the default clockratre 2000000

sho int s0/0/0

both sides up/down
looped at R7

show frame lmi

 important points: frame relay DTE on R7 eventhough we have a clockrate but DTE layer2 FR.
frame-relay DTE means it expects a frame relay DCE that provides clock but in this setup we are using FR back to back. 

1.  We need to turn off LMI by turning keep alives.
2.  After this still encapsulation failed. because there is no L2 to L3 resolution. frame map is needed.
3.  DLCI are locally significant, since R7 and R8 are directly connected, same DLCI must be used on both sides.


R7

int s0/0/0

encapsulation frame

ip address 200.200.200.7 255.255.255.0

clockrate 128000

no shut

no keepalive

frame-relay map ip 200.200.200.8 101 broadcast

frame-relay map ip 200.200.200.7 101

R8

int s0/0/0

encapsulation frame

ip address 200.200.200.8 255.255.255.0

no shut 

no keepalive

frame-relay map ip 200.200.200.7 101 broadcast

frame-relay map ip 200.200.200.8 101

================================================
200.200.210.0/24  multipoint



R7

int s0/0/0.210 multipoint

ip address 200.200.210.7 255.255.255.0

frame-relay map ip 200.200.210.8 111 broadcast

frame-relay map ip 200.200.210.7 111

R8

int s0/0/0 multipoint

ip address 200.200.210.8 255.255.255.0

frame-relay map ip 200.200.210.7 111 broadcast

frame-relay map ip 200.200.210.8 111

================================================
200.200.220.0/24 one point to point


R7

int s0/0/0.220 point-to-point

ip address 200.200.220.7 255.255.255.0

frame-relay interface-dlci 121

R8

int s0/0/0.220 point-to-point

ip address 200.200.220.8 255.255.255.0  

frame-relay interface-dlci 121