[c-nsp] Problem with 7204VXR and ATM PA-A3

[Philip Boettger]

Hello everyone,

we are currently migrating our leased lines from an 7500 router to an  
7200VXR NPE-G1 with PA-A3-OC3MM. After changing the router, several  
customers complained about bad connectivity, and some investigation  
revealed that the downstream (us/Internet -> customer) was nearly  
perfect, but the upstream (customer ->us/Internet) was at best 70% of  
the line capacity. If the downstream is saturated, the upstream gets  
even worse, down to 20% of the line.

Yesterday, we undid the change, and on the 7500 we are back to ideal.  
The problem is that we made the change to be able to terminate new  
circuits by l2tp, which the 7500 is not suited for.

We tried several IOS versions, c7200-is-mz.123-24a.bin, c7200- 
advipservicesk9-mz.124-15.T1.bin and c7200-p-mz.123-24a.bin, with no  
change. Another assumption was that the multipoint may cause problems  
on the 7200, but a test-L2TP-Session over the point-to-point PVC 4/511  
showed the same problems.

Any suggestions/ideas why this problem might exist?

Thanks in advance,
   Phil

Slot 1:
         ATM WAN OC3 (MM) Port adapter, 1 port
         Port adapter is analyzed
         Port adapter insertion time 1w4d ago
         EEPROM contents at hardware discovery:
         Hardware revision 2.0           Board revision A0
         Serial number     XXXXXXXX      Part number    73-2430-04
         FRU Part Number     PA-A3-OC3MM=
         Test history      0x0           RMA number     00-00-00
         EEPROM format version 1
         EEPROM contents (hex):
           0x00: 01 59 02 00 01 9E C4 62 49 09 7E 04 00 00 00 00
           0x10: 50 56 70 00 01 11 02 00 FF FF FF FF FF FF FF FF
           0x20: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
           0x30: FF FF FF FF FF FF FF FF FF FF FF FF


!
interface ATM1/0
no ip address
no ip mroute-cache
no atm ilmi-keepalive
end

!
interface ATM1/0.1 multipoint
ip address 192.168.71.1 255.255.255.0
ip access-group 103 in
ip access-group 102 out
no ip mroute-cache
no snmp trap link-status
pvc 4/32
   class-vc customer
   protocol ip 192.168.71.32
   no oam-pvc manage
   encapsulation aal5snap
!
pvc 4/33
   class-vc customer
   protocol ip 192.168.71.33
   oam-pvc manage 30
   encapsulation aal5snap
!
pvc 4/34
   class-vc customer
   protocol ip 192.168.71.34
   oam-pvc manage 30
!
pvc 4/35
   class-vc customer
   protocol ip 192.168.71.35
   oam-pvc manage 30
!
pvc 4/36
   class-vc customer
   protocol ip 192.168.71.36
   no oam-pvc manage
!
pvc 4/37
   class-vc customer
   protocol ip 192.168.71.37
   oam-pvc manage 30
!
pvc 4/38
   class-vc customer
   protocol ip 192.168.71.38
   oam-pvc manage 30
!
pvc 4/39
   class-vc customer
   protocol ip 192.168.71.39
   oam-pvc manage 30
!
pvc 4/43
   class-vc customer
   protocol ip 192.168.71.43
   oam-pvc manage 30
!
pvc 4/44
   class-vc customer
   protocol ip 192.168.71.44
   oam-pvc manage 30
!
pvc 4/45
   class-vc customer
   protocol ip 192.168.71.45
   oam-pvc manage 30
!
pvc 4/48
   class-vc customer
   protocol ip 192.168.71.48
   oam-pvc manage 30
!
pvc 4/49
   class-vc customer
   protocol ip 192.168.71.49
   oam-pvc manage 30
!
pvc 4/50
   class-vc customer
   protocol ip 192.168.71.50
   oam-pvc manage 30
!
pvc 4/51
   class-vc customer
   protocol ip 192.168.71.51
   oam-pvc manage 30
!
pvc 4/52
   class-vc customer
   protocol ip 192.168.71.52
   oam-pvc manage 30
!
pvc 4/53
   class-vc customer
   protocol ip 192.168.71.53
   oam-pvc manage 30
!
pvc 4/54
   class-vc customer
   protocol ip 192.168.71.54
   oam-pvc manage 30
!
pvc 4/56
   protocol ip 192.168.71.56
   oam-pvc manage 30
   encapsulation aal5snap
!
pvc 4/58
   class-vc customer
   protocol ip 192.168.71.58
   oam-pvc manage 30
!
pvc 4/59
   class-vc customer
   protocol ip 192.168.71.59
   oam-pvc manage 30
!
pvc 4/60
   class-vc customer
   protocol ip 192.168.71.60
   oam-pvc manage 30
!
pvc 4/61
   class-vc customer
   protocol ip 192.168.71.61
   oam-pvc manage 30
!
pvc 4/62
   class-vc customer
   protocol ip 192.168.71.62
   oam-pvc manage 30
!
pvc 4/63
   class-vc customer
   protocol ip 192.168.71.63
   oam-pvc manage 30
!
pvc 4/64
   class-vc customer
   protocol ip 192.168.71.64
   oam-pvc manage 30
!
pvc 4/66
   class-vc customer
   protocol ip 192.168.71.66
   oam-pvc manage 30
!
pvc 4/68
   class-vc customer
   protocol ip 192.168.71.68
   oam-pvc manage 30
!
pvc 4/69
   class-vc customer
   protocol ip 192.168.71.69
   oam-pvc manage 30
!
pvc 4/70
   class-vc customer
   protocol ip 192.168.71.70
   oam-pvc manage 30
!
pvc 4/71
   class-vc customer
   protocol ip 192.168.71.71
   oam-pvc manage 30
!
pvc 4/72
   class-vc customer
   protocol ip 192.168.71.72
   oam-pvc manage 30
!
pvc 4/73
   class-vc customer
   protocol ip 192.168.71.73
   oam-pvc manage 30
!
pvc 4/74
   class-vc customer
   protocol ip 192.168.71.74
   oam-pvc manage 30
!
pvc 4/75
   class-vc customer
   protocol ip 192.168.71.75
   oam-pvc manage 30
!
pvc 4/76
   class-vc customer
   protocol ip 192.168.71.76
   oam-pvc manage 30
!
pvc 4/78
   class-vc customer
   protocol ip 192.168.71.78
   oam-pvc manage 30
!
interface ATM1/0.2 point-to-point
no snmp trap link-status
pvc 4/512
   oam-pvc manage 30
   encapsulation aal5snap
   protocol ppp Virtual-Template1
!
interface ATM1/0.3 point-to-point
no snmp trap link-status
pvc 4/513
   oam-pvc manage 30
   encapsulation aal5snap
   protocol ppp Virtual-Template2
!
interface ATM1/0.4 point-to-point
ip address 192.168.70.10 255.255.255.252
no snmp trap link-status
pvc 4/511
   protocol ip 192.168.70.9
   oam-pvc manage 30
   encapsulation aal5snap
!