CUBE: SIP messages 503 to 500

[matejbernat]

Hello,

I have CUBE installed and configured in between OGW and TGW (regarding network diagram - see below) with allowed only SIP-to-SIP Connections.

In several cases, I'm getting 503 response from TGW, which CUBE sends to OGW as 500.

OGW ------------ CUBE ------------ TGW

==========================

------- INVITE------>|

<-----TRYING ----- |

                          | ------INVITE ---->

                          | <----TRYING ----

                          | <-------183---------

                          | <-------503---------

<---------183----------|

                          | --------ACK------->

<---------500----------|

--------ACK--------->|

My problem is, tahat OGW is sending INVITE again and generates too many calls :-(

I need to get 503 from CUBE to OGW.

Any ideas how to do something like SIP-to-SIP mapping? Or maybe another solution?

Network diagram:

http://www.cisco.com/en/US/products/sw/voicesw/ps5640/products_configuration_example09186a008092d6b3.shtml#diag

Details:

CUBE: Cisco 2821 IOS: SP Services 12.4(24)T8

Tahnk you,

Mike

[Ayodeji Okanlawon]

You can configure header-passing error-passthrough

voice service voip

sip

header-passing error-pass through

NB: CUBE supports 503 natively, so I am surprised that 503 is not passed to the other call leg..

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[matejbernat]

Thanks for your quick answer, but this command is not accessible on my router:

ip2ip-gw(conf-serv-sip)#header-passing ?

I tried to enable just accessible part of that command:

!

voice service voip

allow-connections sip to sip

fax protocol t38 nse ls-redundancy 0 hs-redundancy 0 fallback pass-through g711alaw

modem passthrough nse codec g711alaw

sip

  rel1xx disable

  header-passing

  sip-profiles 100

!

...but nothing has changed:

OGW:

-> SIP/SDP Request: INVITE

<- SIP Status: 100 Trying

<- SIP/SDP Status: 183 Session Progress, with session description

<- SIP Status: 500 Internal Server Error

-> SIP Request: ACK

TGW:

<- 195.28.68.18 SIP/SDP Request: INVITE

-> SIP Status: 100 Trying

-> SIP/SDP Status: 183 Session Progress  , with session description

-> SIP Status: 503 Service Unavailable

<- SIP Request: ACK

>>  CUBE supports 503 natively, so I am surprised that 503 is not passed to the other call leg..

May this be IOS dependent issue?

Cisco 2821 IOS: SP Services 12.4(24)T8

[Ayodeji Okanlawon]

This is how you do it..

conf t

voice service voip

sip

header-passing (press enter), then on the next line

error-passthru

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[matejbernat]

Oh... My bad.

So now it was enabled, but again... no change.

CUBE still answers with 500 instead of 503 :-(

But maybe it make sense...

You wrote that: CUBE supports 503 natively, so I am surprised that 503 is not passed to the other call leg..

This document says that: "SIP error responses that are not supported on the Cisco UBE...".

So maybe I need to investigate, why it's not passing through natively.

Do you know which debug could answer this question?

[Ayodeji Okanlawon]

I suggest you upgrade the IOS on the gateway..What version of IOS are you running..

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"opportunity is a haughty goddess who waste no time with those who are unprepared"

[matejbernat]

My gateway is Cisco 2821 with SP Services 12.4(24)T8 IOS.

That is the latest 12.4T IOS.

I am afraid that I don't have enough RAM/FLASH for IOS 15*.

I have only 254MB of RAM and 64 MB of FLASH.