frame-relay switch configuration, on home lab

aueddonline

Trying to set up a frame relay connection between two 2600 routers, this is what I got so far
2 x 2610 routers with serial connection using the DTE end. Both connecting to a 3640 which has 8 serial interfaces which I’m hoping to us as a frame-relay switch, this has the DCE end of the cable connected.
What kind of configuration needs to be made on the 3640 I’m using as the frame-relay switch i.e. I’m guessing I need to configure the interfaces with IP address (are they in the same subnet?) obviously this is a full mesh design. Encapsulation? Because only the end routers (the 2610’s) using frame-relay care about the encapsulation don’t they not the switch.
Anyway if anyone knows how, be very grateful, cheers

dtlokee

aueddonline wrote:

Trying to set up a frame relay connection between two 2600 routers, this is what I got so far
2 x 2610 routers with serial connection using the DTE end. Both connecting to a 3640 which has 8 serial interfaces which I’m hoping to us as a frame-relay switch, this has the DCE end of the cable connected.
What kind of configuration needs to be made on the 3640 I’m using as the frame-relay switch i.e. I’m guessing I need to configure the interfaces with IP address (are they in the same subnet?) obviously this is a full mesh design. Encapsulation? Because only the end routers (the 2610’s) using frame-relay care about the encapsulation don’t they not the switch.
Anyway if anyone knows how, be very grateful, cheers

Frame-relay interfaces on the frame-relay switch do not need IP addresses, they are L2 only. You need to configure the 3640 to switch frame-relay frames using the "frame-realy switching" command. Then you need to plan out the PVCs and use the "frame-relay route" command and the "frame-relay intf-type dce".

There are some examples here:

http://www.techexams.net/techlabs/ccna/lab_fr.shtml

aueddonline

thanks man that makes a lot of sense, i was almost thinking over the right lines

aueddonline

having a couple of problems getting connected

***frame-relay switch configuration***

interface Serial1/0
no ip address
encapsulation frame-relay
clock rate 64000
no fair-queue
frame-relay lmi-type ansi
frame-relay intf-type dce
frame-relay route 100 interface Serial1/1 101
!
interface Serial1/1
no ip address
encapsulation frame-relay
clock rate 64000
no fair-queue
frame-relay lmi-type ansi
frame-relay intf-type dce
frame-relay route 101 interface Serial1/0 100

***end router configuration***
Router1
interface Serial0/0
ip address 10.0.7.1 255.255.255.0
encapsulation frame-relay
fair-queue
frame-relay map ip 10.0.7.2 101 broadcast
frame-relay lmi-type ansi

Router 2
interface Serial0/0
ip address 10.0.7.2 255.255.255.0
encapsulation frame-relay
frame-relay map ip 10.0.7.1 100 broadcast
frame-relay lmi-type ansi

Router 1 s0/0 is in an up up state while this is the readout from Router 2

R-Beta#show int s0/0
Serial0/0 is up, line protocol is down
Hardware is PowerQUICC Serial
Internet address is 10.0.7.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 253/255, txload 1/255, rxload 1/255
Encapsulation FRAME-RELAY, loopback not set
Keepalive set (10 sec)
LMI enq sent 583, LMI stat recvd 0, LMI upd recvd 0, DTE LMI down
LMI enq recvd 0, LMI stat sent 0, LMI upd sent 0
LMI DLCI 0 LMI type is ANSI Annex D frame relay DTE
Broadcast queue 0/64, broadcasts sent/dropped 0/0, interface broadcasts 0
Last input never, output 00:00:03, output hang never
Last clearing of "show interface" counters 01:42:05
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1158 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
71 input errors, 0 CRC, 71 frame, 0 overrun, 0 ignored, 0 abort
583 packets output, 8155 bytes, 0 underruns
0 output errors, 0 collisions, 202 interface resets
0 output buffer failures, 0 output buffers swapped out
12 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up

anyone see anything ?????

dtlokee

You may have the "frame-relay map" commands backwards assuming that you connected R1 to serial 0/0 and R2 to serial 0/1.

The show interface output seems to indicate bad hardware or a bad cable, there are no LMI status packets being received by the DTE, make sure the frame switch is sending them by looking at the output of show interface on the frame switch.

NeonNoodle

There are a lot of errors on that interface so it could be a loose cable or bad interface that is causing you trouble. Otherwise, your configuration doesn't seem to indicate that you wouldn't have layer 2 connectivity except that you should ensure you have "frame-relay switching" enabled on the router acting as a frame relay switch.

aueddonline

The map command is right isn't it.

frame-relay map ip (then desination IP)(desination DCLI) broadcast

this is the readout from the frame-switch, doesn't look like it's sending LMI messages


Serial1/1 is down, line protocol is down
Hardware is CD2430 in sync mode
MTU 1500 bytes, BW 128 Kbit, 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
LMI enq recvd 812, LMI stat sent 812, LMI upd sent 0, DCE LMI down
LMI DLCI 0 LMI type is ANSI Annex D frame relay DCE
FR SVC disabled, LAPF state down
Broadcast queue 0/64, broadcasts sent/dropped 0/0, interface broadcasts 0
Last input 00:00:00, output never, output hang never
Last clearing of "show interface" counters 02:20:23
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
817 packets input, 12942 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 1 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=down RTS=up CTS=up

NeonNoodle

aueddonline wrote:

The map command is right isn't it.

frame-relay map ip (then desination IP)(desination DCLI) broadcast

this is the readout from the frame-switch, doesn't look like it's sending LMI messages


Serial1/1 is down, line protocol is down

doesn't look like it's connected.

aueddonline

i've changed the cable now, looks like one of them might be bad

got all connections in an up up state now, can't ping accross the link though!

talk about one problem to the next

dtlokee

aueddonline wrote:

DCD=up DSR=up DTR=down RTS=up CTS=up

All of these need to be up, I would try swapping the cables, and connecting the other end to a different interface to test for a bad serial interface. You can loop the cable back to the frame switch itself to test for good and bad interfaces.

aueddonline

check, they're all up now, waht do you think to the ping?

dtlokee

aueddonline wrote:

check, they're all up now, waht do you think to the ping?

you may want to check the "show frame-relay pvc" and see if the DLCI's are listed as active or deleted. If they are listed as deleted it would indicate you are trying to use the wrong DLCI on the access link. Basically the router is trying to use a DLCI that is not confiugred on the link, and the frame switch is overriding the DTE and deleting the DLCI.

I think you may have your frame-relay map statements backwards, take them off and let inverse arp do it's thing and see if that fixes it.

aueddonline

right inverse arp's doing the business i'll go over it and get those map commands right

thank you so much dtlokee, that could have been really long and painful

dtlokee

When working with frame relay the "show frame-relay pvc" command will show you what DLCI's are being sent by the frame switch to your router, you can use that to see what has been configured by the provider (or in this case you home lab). The next ting to look at is the "show frame-relay map" command to see ho they are being mapped to the IP addresses. When you use a static mapping basically you're telling the router what DLCI to use when sending a frame to a remote IP address. Always remember the DLCI is the local end, not the DLCI in use on the remote end.