How to configure cisco 12010 router's POS port for s1s0

Answered Question
Sep 29th, 2010
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I am facing competability problem between CISCO 12010 router's POS port with SDH STM1 PORT.So we need to change s1s0 values on router POS port.

So please suggest with posibile command to configure s1s0 values on router POS port.

Correct Answer by marikakis about 6 years 7 months ago

Well, I said previously that the 3rd time might be the charm, didn't I?

It doesn't matter if the representation is hexadecimal or not. Values 0-3 correspond to 1 hexadecimal or 1 decimal digit anyway. I would use the "framing sdh" option under the controller, and for the "overhead s1s0" the value 2 (same in decimal and hexadecimal).

Correct Answer by marikakis about 6 years 8 months ago

Try "pos framing sdh" under POS interface and (if required) also use "pos flag s1s0 2".

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brijeshch1 Wed, 09/29/2010 - 06:48
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Hi Marikakis,

Thanks for quick response, I have tried already  what you suggested.I cant see pos flag command at cisco 12010 router's  pos interface.I can have it at remote end router which is Cisco  7609.Please find below out put of both routers.





RP/0/8/CPU0:12000P2(config)#int  pos0/3/0/1

RP/0/8/CPU0:12000P2(config-if)#pos ?
   crc             Set the CRC on a POS interface
  transmit-delay  Set  POS transmit delay on an interface

ROUTER_1(config)#int po3/0/1
ROUTER_1(config-if)#pos  ?
  ais-shut      Send LAIS when shutdown
  delay         Delay  POS alarm triggers
  flag          Specify byte value
   framing       specify framing
   report        enable reporting of selected alarms
  scramble-atm   Enable POS SPE scrambling
  threshold     Set BER threshold values

NOIDA_MGW03_ROUTER_1(config-if)#pos  flag ?
  c2    Path overhead byte
   j0    Section trace byte (default is 0x01)
  s1    Specify byte S1
   s1s0  Specify bit S1 and S0 of H1
marikakis Wed, 09/29/2010 - 07:04
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Sorry about that. Can you try not using the word "pos" in front of the command, i.e. "framing sdh"? Also, try "overhead s1s0 2" command.

Hopefully the 3rd time will be the charm!

brijeshch1 Wed, 09/29/2010 - 07:24
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Thanks for reply,I cant see framing sdh or overhead commands on interface.Please find below output.



  bandwidth       Set the bandwidth of an interface
  bundle          Link aggregation per-interface commands
  cdp             Enable CDP on an interface
  clear           Clear the uncommitted configuration
  clear           Clear the configuration
  commit          Commit the configuration changes to running
  dampening       configure state dampening on the given interface
  describe        Describe a command without taking real actions
  description     Set description for this interface
  do              Run an exec command
  encapsulation   Set the encapsulation on an interface
  exit            Exit from this submode
  flow            Netflow configuration
  frame-relay     Frame Relay interface configuration commands
  ipv4            IPv4 interface subcommands
  ipv6            IPv6 interface subcommands
  keepalive       Set the keepalive interval, or disable keepalives
  l2transport     Enable Layer 2 transport and enter its configuration submode
  lacp            Link Aggregation Control Protocol per-interface commands
  load-interval   Specify interval for load calculation for an interface
  mpls            MPLS interface subcommands
  mtu             Set the MTU on an interface
  no              Negate a command or set its defaults
  pos             Modify POS parameters

marikakis Wed, 09/29/2010 - 07:31
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Never too late to ask: what kind of POS linecard are you using?

marikakis Wed, 09/29/2010 - 09:04
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Does your router support the command "controller sonet ?" from global config mode?

Can you also post "sh ver",  "sh diag " and "sh controller pos" ?

brijeshch1 Thu, 09/30/2010 - 00:13
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Hi I think I m near to the solution.As per below output its default value is 0x0.Is it in hexdesimal?, I can give 0-3 what is the exact range for that interface?



RP/0/8/CPU0:12000P2(config)#controller sonet ?

  0/2/2/0  SONET Interface Instance

  0/2/2/1  SONET Interface Instance

  0/2/2/2  SONET Interface Instance

  0/2/2/3  SONET Interface Instance

  0/2/3/0  SONET Interface Instance

  0/2/3/1  SONET Interface Instance

  0/2/3/2  SONET Interface Instance

  0/2/3/3  SONET Interface Instance

  0/4/1/0  SONET Interface Instance

RP/0/8/CPU0:12000P2(config)#controller sonet 0/2/3/2 ?

  ais-shut          Enable sending SONET/SDH LAIS when shutdown

  au                Configure SDH path parameters

  clock             Configure SONET/SDH port clock

  delay             Configure SONET/SDH port delay values

  down-when-looped  Configure SONET/SDH controller into down-when-looped mod

  framing           Configure SONET/SDH framing

  loopback          Configure SONET/SDH controller loopback mode

  overhead          Configure SONET/SDH SOH/LOH byte/bit values

  path              Configure SONET/SDH path parameters

  report            Configure SONET/SDH section/line alarm reporting

  s1byte            Configure SONET/SDH controller to s1byte ignore mode

  shutdown          Disable SONET/SDH controller processing

  sts               Configure SONET path parameters

  threshold         Configure SONET/SDH section/line BER threshold values


RP/0/8/CPU0:12000P2(config)#controller sonet 0/2/3/2 overhead ?

  j0    Specify STS identifier (J0/C1) byte

  s1s0  Specify bits s1 and s0 of H1 byte

RP/0/8/CPU0:12000P2(config)#controller sonet 0/2/3/2 overhead s1s0 ?

  <0-3>  s1 & s0 bits value (default 0x0)

Correct Answer
marikakis Thu, 09/30/2010 - 01:05
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Well, I said previously that the 3rd time might be the charm, didn't I?

It doesn't matter if the representation is hexadecimal or not. Values 0-3 correspond to 1 hexadecimal or 1 decimal digit anyway. I would use the "framing sdh" option under the controller, and for the "overhead s1s0" the value 2 (same in decimal and hexadecimal).

brijeshch1 Thu, 09/30/2010 - 01:55
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Hi marikakis,

Thank you very much for suuport and quick response every time.Will try to implement same, Hope it will work.Thanks again.

marikakis Thu, 09/30/2010 - 03:42
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You are welcome! I also hope it will work this time. Helping to get something to work is a pleasure. Sometimes the more effort it takes, the better it feels in the end. If you manage to get this working somehow, please post so that it is clear in the thread how exactly your issue was resolved. This information might help others in the future.

brijeshch1 Thu, 09/30/2010 - 04:56
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Thanks for encouragment,Surely will update the status.Thank You

brijeshch1 Fri, 10/15/2010 - 00:42
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The problem was solved by changing framming type,as bydefaut it is SONET, we required to change it to SDH.some of the mux have compatibility problem with routers ports, other wise this things can be auto detected.

Sorry for delay in reply...Thanks for support


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