Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

Frame-Relay to ATM FRF.8.1 ping loosing packets

Hi ppl, I have serios problems, I have 2 router, one side is ATM technology and other side is Frame-Relay. Service Provider use Frame-Relay to ATM Translation FRF.8.1, i have like 10 locations on Frame-Releay and now i have on central location ATM so now I want to all location connect to ATM Central Location. Routing is ok but I all the time loosing packet when i ping.

I will copy configuration and ping command. Service Provider say that they have NORTEL Switch for interconnections.

Thanks for any help!!!

*** ROUTER ATM SIDE ***

interface ATM1/0

mtu 1500

no ip address

load-interval 30

no atm ilmi-keepalive

pvc 3845-ATM 0/16 ilmi

ilmi manage

interface ATM1/0.50 point-to-point

description *** to Router Frame-Relay

ip address 192.168.1.102 255.255.255.252

pvc Unitic 2/50

protocol ip 192.168.1.101 broadcast

vbr-nrt 512 512

oam-pvc manage

encapsulation aal5snap

PING LOOSING PACKETS FROM ATM SIDE

Rt3845-ATM36-sar01#ping 192.168.1.101 repeat 200

Type escape sequence to abort.

Sending 200, 100-byte ICMP Echos to 192.168.1.101, timeout is 2 seconds:

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Success rate is 100 percent (200/200), round-trip min/avg/max = 8/8/16 ms

Rt3845-ATM36-sar01#ping 192.168.1.101 repeat 500

Type escape sequence to abort.

Sending 500, 100-byte ICMP Echos to 192.168.1.101, timeout is 2 seconds:

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

!!!!!!!!!!

Success rate is 99 percent (499/500), round-trip min/avg/max = 8/8/12 ms

*** ROUTER FRAME RELAY SIDE ***

interface Serial0/0/0

no ip address

encapsulation frame-relay IETF

no fair-queue

frame-relay traffic-shaping

!

interface Serial0/0/0.1 point-to-point

bandwidth 512

ip address 192.168.1.101 255.255.255.252

no ip mroute-cache

no cdp enable

frame-relay class 512_ATM

frame-relay interface-dlci 50

!

map-class frame-relay 512_ATM

frame-relay cir 512000

frame-relay bc 5120

frame-relay be 0

frame-relay mincir 512000

PING LOOSING PACKETS FROM FRAME RELAY SIDE

router-FR#ping 192.168.1.102

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.1.102, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 8/9/12 ms

router-FR#ping 192.168.1.102 repeat 200

Type escape sequence to abort.

Sending 200, 100-byte ICMP Echos to 192.168.1.102, timeout is 2 seconds:

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Success rate is 99 percent (198/200), round-trip min/avg/max = 8/9/12 ms

router-FR#ping 192.168.1.102 repeat 200

Type escape sequence to abort.

Sending 200, 100-byte ICMP Echos to 192.168.1.102, timeout is 2 seconds:

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Success rate is 99 percent (198/200), round-trip min/avg/max = 8/9/12 ms

router-FR#

1 REPLY
Hall of Fame Super Silver

Re: Frame-Relay to ATM FRF.8.1 ping loosing packets

Hello Anis,

be aware that ATM side has more overhead:

IP frames are placed inside an AAL5 PDU that is then segmented in ATM cells

you are using AAL5SNAP encapsulation.

see the following:

http://www.cisco.com/en/US/docs/ios/12_2/wan/configuration/guide/wcffratm.html#wp1009756

Hope to help

Giuseppe

110
Views
0
Helpful
1
Replies