[c-nsp] OSPF over PPPoATM

[Daniele Orlandi]

On Monday 20 October 2008 15:43:03 Marko Milivojevic wrote:
>
> Before I accuse intermediate DSLAM filtering them, could you post
> relevant interface and OSPF process configurations from both routers,
> please?

Marko,

Would it be possible for a DSLAM to implement filtering on the AAL5 
encapsulated traffic? It would have to decapsulate and interpret UDP/IP 
packets to do it. Did you experience anything similar?

I would point my finger at a IOS bug, however I tried several completely 
different IOSes on both the termination and DSL box with no change.

Anyway, this is the relevant configuration:

7200 PPP terminator:
------------------------------

interface ATM2/0
 no ip address
 load-interval 30
 atm sonet stm-1
 atm pppatm passive
 no atm auto-configuration
 no atm ilmi-keepalive
 no atm address-registration
 no atm ilmi-enable
 
 range PPPOA-10 pvc 10/100 10/250
  ubr 1000
  dbs enable
  oam-range manage
  encapsulation aal5mux ppp Virtual-Template1
  create on-demand

interface Virtual-Template1
 ip unnumbered Loopback0
 no ip redirects
 no ip proxy-arp
 ip ospf message-digest-key 1 md5 7 xxxx
 ip ospf network point-to-point
 peer default ip address pool adsl
 ppp authentication pap callin adsl
 ppp authorization adsl
 ppp accounting adsl

router ospf 9026                                                        
 log-adjacency-changes                                                  
 area 0 authentication message-digest                                   
 summary-address 62.212.6.0 255.255.255.0                               
 summary-address 62.212.4.0 255.255.255.0                               
 redistribute connected subnets                                         
 redistribute static subnets                                            
 network 62.212.0.0 0.0.31.255 area 0      

-----

gw-dsl#sh ip ospf interface Vi2.21
Virtual-Access2.21 is up, line protocol is up
  Internet Address 0.0.0.0/0, Area 0
  Process ID 9026, Router ID 62.212.3.248, Network Type POINT_TO_POINT, Cost: 
100
  Transmit Delay is 1 sec, State POINT_TO_POINT,
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
    oob-resync timeout 40
    Hello due in 00:00:00
  Index 33/33, flood queue length 0
  Next 0x0(0)/0x0(0)
  Last flood scan length is 0, maximum is 0
  Last flood scan time is 0 msec, maximum is 0 msec
  Neighbor Count is 1, Adjacent neighbor count is 0
  Suppress hello for 0 neighbor(s)
  Message digest authentication enabled
    Youngest key id is 1



2800 DSL Box:
------------------------------
interface ATM0/1/0                                                   
 no ip address                                                       
 no atm ilmi-keepalive                                               
 dsl operating-mode auto
 pvc 8/35
  encapsulation aal5mux ppp Virtual-Template1

interface Virtual-Template1
 ip address negotiated
 ip ospf message-digest-key 1 md5 7 xxx
 ipv6 enable
 ppp pap sent-username uli.adsl password 7 xxx

router ospf 9026
 log-adjacency-changes
 area 0 authentication message-digest
 redistribute connected subnets
 redistribute static metric 200 subnets
 network 62.212.0.0 0.0.31.255 area 0

---------

gw-milano#sh ip ospf interface Vi1.1
Virtual-Access1.1 is up, line protocol is up
  Internet Address 62.212.6.189/32, Area 0
  Process ID 9026, Router ID 62.212.3.243, Network Type POINT_TO_POINT, Cost: 
284
  Transmit Delay is 1 sec, State POINT_TO_POINT,
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
    oob-resync timeout 40
    Hello due in 00:00:07
  Supports Link-local Signaling (LLS)
  Index 5/5, flood queue length 0
  Next 0x0(0)/0x0(0)
  Last flood scan length is 0, maximum is 0
  Last flood scan time is 0 msec, maximum is 0 msec
  Neighbor Count is 0, Adjacent neighbor count is 0
  Suppress hello for 0 neighbor(s)
  Message digest authentication enabled
    Youngest key id is 1

Bye,

-- 
  Daniele Orlandi							つづく