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New Member

ATM/Frame Relay Internetworking - How do I monitor for loss of PVC?

I have 2 7513's in my core with ATM DS3 attached, connecting remote offices using Frame-Relay Internetworking. 2 PVC's are mapped to the 2 7513's, one is primary the other is for backup. If I shut any of the connections the other end doesn't see it go away. I know this is because the frame is still seeing lmi responses and the ATM is still seeing OAM. How do I config to make the interfaces actually see the other end go down? No traffic will go to the backup PVC if the router thinks the primary is still up.

4 REPLIES
Silver

Re: ATM/Frame Relay Internetworking - How do I monitor for loss

Check out FRF.8 Spec. End to end Frame to ATM pvc/vc management should get you what you want.

http://www.cisco.com/en/US/tech/tk39/tk53/technologies_configuration_example09186a00800945b3.shtml

Hope this helps you,

Don

New Member

Re: ATM/Frame Relay Internetworking - How do I monitor for loss

Unfortunately, the switch belongs to AT&T, so I don't have any control over it. I am using 160X routers with point-to-point subinterfaces on the remote end and 7513's with PA-A3-T3's in VIPs also with point-to-point subinterfaces.

Here is the config of the serial interface on the remote:

interface Serial0

no ip address

encapsulation frame-relay

no ip route-cache

no ip mroute-cache

bandwidth 128

no fair-queue

service-module t1 timeslots 1-2

!

interface Serial0.60 point-to-point

description Primary PVC to AlnA ATM 11/0/0.905

ip address 192.168.7.66 255.255.255.252

no ip route-cache

no ip mroute-cache

bandwidth 128

frame-relay interface-dlci 60 IETF

!

interface Serial0.61 point-to-point

description Secondary PVC to AlnB ATM 11/0/0.905

ip address 192.168.7.70 255.255.255.252

no ip route-cache

no ip mroute-cache

bandwidth 4

frame-relay interface-dlci 61 IETF

!

interface Serial0.109 point-to-point

description Local DLCI 905

ip address 192.168.64.22 255.255.255.252

ip broadcast-address 192.168.64.23

no ip proxy-arp

no ip route-cache

no ip mroute-cache

frame-relay interface-dlci 109

Here is the config from one of the 7513's:

interface ATM11/0/0

no ip address

load-interval 30

atm uni-version 3.1

!

interface ATM11/0/0.51 point-to-point

description AlnB-SchRTR4 ATM 1/1/0.55

ip address 192.168.7.17 255.255.255.252

pvc SchRTR4 1/51

vbr-nrt 45000 45000 1

no ilmi manage

oam-pvc manage

!

!

interface ATM11/0/0.63 point-to-point

description AlnB-CMS2 ATM 6/0.61

ip address 192.168.7.13 255.255.255.252

pvc CMS1.63 1/63

vbr-nrt 45000 45000 1

no ilmi manage

oam-pvc manage

!

!

interface ATM11/0/0.65 point-to-point

description AlnB-SchRTR4 ATM 1/1/0.61

ip address 192.168.7.9 255.255.255.252

pvc SchRTR4.65 1/65

vbr-nrt 45000 45000 1

no ilmi manage

oam-pvc manage

!

!

interface ATM11/0/0.905 point-to-point

description Secondary ATM/FR Link to gwLoveland

bandwidth 4

ip address 192.168.7.69 255.255.255.252

pvc Loveland 1/905

protocol ip 192.168.7.71 broadcast

vbr-nrt 128 4 1

no ilmi manage

oam-pvc manage

encapsulation aal5snap

Any suggestions on what I can do with what is under my control?

Silver

Re: ATM/Frame Relay Internetworking - How do I monitor for loss

For End to end PVC management you'll need some IWF/FRF.8 function in the cloud for this to happen. Possibly your provider can give you these functions. Here is another good link showing what is needed for this to occur.

http://www.cisco.com/warp/public/121/frf8_pvc_manage.html

Hope this helps you,

Don

New Member

Re: ATM/Frame Relay Internetworking - How do I monitor for loss

Don, Thanks. Scenario 2 in this document creates exactly what we are seeing. Now I just have to get AT&T to configure the IWF correctly.

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