Frame Relay and 2600XM..lab setup

robertmcclain · ‎10-22-2004

I have a 3660 router acting as a frame switch. I connect 2 2500 routers (12.0(28)), config ure them for Frame and voila they work fine. They are connected via the serial ports and external csu/dsu's. When I take one of them out of the mix and put this 2600xm(12.2(26)) in, using the same Frame configuration from the router I disconnected, the circuit comes up but not the PVC. I show LMI packets being transmitted from the 2600, but nothing recieved. It shows those packets all timed out. I am not recieving any errors on the T-1. The oposite 250 router is still up and up. I had the LMI hard coded and have also tried letting it auto discover. I've verified connectivity to the correct ports etc. Just not sure where else to look.

robertmcclain · ‎10-22-2004

PS.

It's a wic1-dsu-t1 in the 2600.

thisisshanky · ‎10-22-2004

Can you paste your configs on either ends of the FR switch and the 2600 ??

What does a show frame-relay pvc look like on either 2600 ??

Sankar Nair
UC Solutions Architect
Pacific Northwest | CDW
CCIE Collaboration #17135 Emeritus

robertmcclain · ‎10-22-2004

This is the 2500 config

interface Serial1

bandwidth 1544

ip address 192.168.198.213 255.255.255.252

no ip directed-broadcast

encapsulation frame-relay

logging event subif-link-status

logging event dlci-status-change

frame-relay interface-dlci 32

This is the 2600xm config

interface Serial0/0

description **SPRINT**

bandwidth 1544

ip address 192.168.198.214 255.255.255.252

ip directed-broadcast

encapsulation frame-relay

no ip route-cache

no ip mroute-cache

logging event subif-link-status

logging event dlci-status-change

keepalive 15

service-module t1 clock source internal

service-module t1 timeslots 24

service-module t1 remote-alarm-enable

frame-relay interface-dlci 33

This is the 3660 config (cloud)

interface Serial2/1

bandwidth 1544

no ip address

encapsulation frame-relay

keepalive 15

serial restart-delay 0

frame-relay intf-type dce

frame-relay route 30 interface Serial2/2 31

frame-relay route 33 interface Serial2/2 32

!

interface Serial2/2

no ip address

encapsulation frame-relay

keepalive 15

serial restart-delay 0

frame-relay lmi-type ansi

frame-relay intf-type dce

frame-relay route 31 interface Serial2/1 30

frame-relay route 32 interface Serial2/1 33

thisisshanky · ‎10-22-2004

Do you show the serial interface on the 2600 as up and up (line protocol up) ? I assume you do have a csu/dsu on the 3660 side and have a t1 cross over to the 2600 router. Try a clock source internal on the csu/dsu on the 3660 side and clock source external on the 2600 router. Not sure if this help ...

What does a show interface serial on the 2600 look like as well as "show frame-relay pvc" on the 2600 ?

Sankar Nair
UC Solutions Architect
Pacific Northwest | CDW
CCIE Collaboration #17135 Emeritus

robertmcclain · ‎10-22-2004

You are correct in your assumption. I have external csu/dsu's attached to the serial interfaces of the 3660. When I have the 2600 on, the port shows line up, protocol down.

The show frame pvc from the 3660 (when connected to the 2600) seems to implicate that the DLCI's are wrong. But I have confirmed that they aren't by bringing the 2500 back up on-line when it replaces the 2600. I will post the sh frame pvc from the 3660.

robertmcclain · ‎10-22-2004

I hope you get this attachment. Currently the 2500's are on line and everything is up and up on the ports and the PVC's all show active.

thisisshanky · ‎10-22-2004

Your problem is not with the frame-relay DLCIs. You should first get the line protocol status on the 2600 to up.

Try setting clock source as external on the wic-1dsu-t1 and on the csu/dsu at the 3660 try setting clock source as internal.

Hope that fixes the problem.

Also you are using physical interfaces for frame-relay (no sub interfaces). So you really do not need to specify the frame-relay interface-dlci commands.

Sankar Nair
UC Solutions Architect
Pacific Northwest | CDW
CCIE Collaboration #17135 Emeritus

robertmcclain · ‎10-22-2004

I verified the clocking and switched it around and then back again. Tried it with no DLCI configuration. I did get it to come up and here's what I found. I needed to remove the timeslot configuration. That gave me up and up. The DLCI's showed active but not in use. I configured the DLCI and the LMI and everythng came up and stayed up. I had to configure the LMI cause it was hard coded on the 3660, but I imagine both would have defaulted to Cisco. So everything is now working, so I will have to revamp it alittle and get it ready to go to New York. Would you happen to know why these serial interfaces won't ping?

Thanks again for your help

Bob McClain

thisisshanky · ‎10-22-2004

Do you see a frame-relay dlci to ip address mapping in each router (2600 and 2500) ?

show frame-relay map.

By default frame-relay invere ARP should be on and the dlci to ip address mapping should be automatically populated.

Also you cannot ping your own frame-relay interface. Though you should be ablet o ping the remote end.

Sankar Nair
UC Solutions Architect
Pacific Northwest | CDW
CCIE Collaboration #17135 Emeritus

robertmcclain · ‎10-25-2004

No mappings show up. I added the frame-relay map command to both routers. Mapping thier IP's to thier DLCI's. It still wouldn't ping. I saw that I had left off the ip address for the 2600 serial port. I put it back in and everything pings now. I removed the frame map commands, so instead of static mappings I recieved dynamic mappings and everything works.

Again thank you for your help.

Bob