Datasheet

Lab – Configuring Frame Relay and Subinterfaces
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ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
+ - replicated route, % - next hop override
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 10.1.1.0/30 is directly connected, Serial0/0/0
L 10.1.1.1/32 is directly connected, Serial0/0/0
192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.1.0/24 is directly connected, GigabitEthernet0/0
L 192.168.1.1/32 is directly connected, GigabitEthernet0/0
D 192.168.3.0/24 [90/2172416] via 10.1.1.2, 00:01:54, Serial0/0/0
Step 3: Change the Frame Relay encapsulation type.
Cisco IOS software supports two types of Frame Relay encapsulation: the default Cisco encapsulation and
the standards-based IETF encapsulation.
a. Change the Frame Relay encapsulation on S0/0/1 on R3 to IETF.
R3(config)# interface s0/0/1
R3(config-if)# encapsulation frame-relay ietf
b. Issue the show interfaces s0/0/1 command on R3 and FR. Even though the encapsulation is different on
each interface, the link is still active. This is because Cisco routers understand both types of incoming
frames. However, if you have routers from different vendors and you are using Frame Relay, then the
IETF standard must be used.
R3# show interfaces s0/0/1
Serial0/0/1 is up, line protocol is up
Hardware is WIC MBRD Serial
Internet address is 10.1.1.2/30
MTU 1500 bytes, BW 1544 Kbit/sec, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation FRAME-RELAY IETF, loopback not set
Keepalive set (10 sec)
LMI enq sent 1898, LMI stat recvd 1900, LMI upd recvd 0, DTE LMI up
<output omitted>
FR# show interfaces s0/0/1
Serial0/0/1 is up, line protocol is up
Hardware is WIC MBRD Serial
MTU 1500 bytes, BW 1544 Kbit/sec, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation FRAME-RELAY, loopback not set
Keepalive set (10 sec)
LMI enq sent 0, LMI stat recvd 0, LMI upd recvd 0
c. Reset the R3 Frame Relay encapsulation back to Cisco (the default).
R3(config)# interface s0/0/1
R3(config-if)# encapsulation frame-relay