Mobicents  Diameter  Progress,  Use  Cases  and  Roadmap    

Alexandre  Mendonça  &  Bartosz  Baranowski  8th  December  2011  @  Sochi,  RU  

Agenda  •  Overview  •  IntroducKon  to  Diameter  •  Architecture  •  Use  Cases  

•  Roadmap  •  2010/2011  Roadmap  Review  

•  Community  •  Overview  •  Releases  

•  Roadmap  •  2011/2012  Roadmap  Preview  •  Releases  

 

Introduction  to  Diameter  •  Born  as  the  Next  GeneraKon  AAA  Protocol  to  replace  RADIUS  •  ..but  much  more  than  just  that,  being  widely  used  for  several  other  purposes  

•  Base  protocol  defines  the  message  format,  peer  connecKon  related  operaKons  and  basics  for  AccounKng  and  AuthenKcaKon/AuthorizaKon  

•  Base  (or  any  other  ApplicaKon)  is  easily  extended  by  adding  new  messages  and/or  AVPs  •  So  easy  everybody  is  having  their  own  customized  ApplicaKons,  with  barely  no  standard  ApplicaKons  usage  

•  Byte-­‐oriented  messages,  consisKng  of  header  and  payload  (AXribute-­‐Value-­‐Pair,  AVPs)  

Architecture:  Overview  

Architecture:  HA/FT  

Cache          

Session-­‐Id:  1  Type:  X  …Data…  

Session-­‐Id:  2  Type:  Y  …Data…  

Session-­‐Id:  3  Type:  X  …Data…  

…  

Node  1  Supports  X  &  Y  

Node  2  Supports  Y   …  

Architecture:  HA/FT  •  Selected  Session  Data  is  replicated  to  cache  a_er  processing  the  received  iniKal  Request  

•  At  any  Kme,  any  node  can  pick  and  resume  any  session,  by  invoking  proper  method  in  stack  for  reconstrucKng  session  locally  •  Ideally  allow  by  configuraKon  to  prefer  to  choose  the  node(s)  which  already  have  session  locally  

•  Once  session  is  reconstructed,  session  data  is  kept  locally  to  avoid  the  overhead  of  recreaKng  it  every  Kme  

•  Once  session  is  terminated,  all  nodes  are  noKfied  and  clear  their  local  session  data  

Use  Cases:  Online  Charging  

Roadmap:  2010/11  Review  •  “Improve  Stability  and  Performance”  •  Jenkins  soak  test  job  running  weekly  at  750  requests/second  for  2.5  hours  in  Mobicents  JAIN  SLEE  •  Total  of  7.000.000  Requests,  usually  with  no  missed  requests.  

•  Last  year  Performance  goal  was  set  to  1000  requests/second.  Got  up  to  9000  requests/second  !  •  Using  an  iMac  Core  2  Duo  @  3.06  GHz  /  4GB  RAM,  no  special  setup.  •  Eventually  with  a  beXer  setup,  the  numbers  may  go  quite  higher.    

150   800  

9000  

0  

5000  

10000  

Requests/s  

2009  

2010  

2011  

Roadmap:  2010/11  Review  •  “Support  more  applicaKons,  by  request”  •  Added  support  for  Gx,  Gq’,  Rx,  S6a  ApplicaKons  •  ContribuKons  included  Diameter  Stack  support  and  JAIN  SLEE  Resource  Adaptors  as  well  

•  All  of  them  were  contributed  by  community  users  •  Some  were  only  parKally  developed,  to  fit  the  users  needs…  we  implemented  the  remaining  

•  Gx  was  a  collaboraKve  contribuKon  between  two  different  users,  from  Free  Mobile  and  Smilescom  •  Great  to  see  community  work  together!  

•  All  were  reviewed,  fixed  and,  when  possible,  sent  back  to  the  authors  for  validaKon  in  their  working  environment  

Roadmap:  2010/11  Review  •  “Support  of  other  funcKonal  nodes  besides  client  and  server:  Redirect,  Relay  and  Proxy”  •  Redirect  and  Relay  support  integrated  into  stack  •  Proxy  support  through  applicaKon  •  Already  tested  and  used  (with  bugs  found)  by  community  users  (from  Free  Mobile)  

•  “Extend  testsuite”  •  Greatly  increased  the  testsuite  for  both  Diameter  Stack,  Diameter  RAs  and  funcKonal  tests  for  replicaKon  scenarios  

•  Currently  Diameter  Testsuite  contains  594  JUnit  tests,  and  increase  of  100%  from  last  year.  

Roadmap:  2010/11  Review  •  Some  shortcomings:  •  Missed  the  goal  to  support  TLS  /  IPSec  •  Failed  the  “More  Examples”  target  

•  Mainly,  no  B2BUA  integraKon  example  with  JAIN  SLEE  or  SIP  Servlets  •  Projected  Roadmap  not  followed  

•  More  1.3.x  releases,  less  1.4.x  releases  •  Haven’t  yet  reached  the  1.4.0.FINAL  release  

•  No  pluggable  Diameter  Load  Balancing  algorithms  and  no  integraKon  with  Mobicents  Load  Balancer  

•  No  improvement  on  DocumentaKon  regarding  development  with  stack  

•  No  progress  on  JAIN  SLEE  HSS  work  or  SIP  Presence  integraKon  

Diameter  Charging  Server  •  Standalone  applicaKon,  started  as  a  test  project  for  our  own  tesKng,  Diameter  Charging  Server  Simulator  

•  Made  source  and  binary  available  to  public  for  using  with  Mobicents  SIP  Servlets  Ro  (Online  Charging)  Example  

•  600  Downloads  for  the  first  version  (since  May  2010).  It’s  now  deprecated  and  not  available  for  download  

•  Updated  at  May  2011  with  some  scenario  improvements  and  some  fixes  requested  by  community  

•  300  Downloads  for  the  new  version  so  far  •  Migrated  to  JAIN  SLEE  as  for  a  requested  customized  development,  but  with  public  availability  in  mind  •  Not  yet  available  for  public.  To  be  soon.  

Community:  Overview  •  Growing  User  Base  •  Increasing  traffic  on  public  mailing  list  •  Over  40  User  Reported  Issues  from  11  different  users/companies  

•  Last  year  we  had  12  issues  reported  by  2  users  •  Many  small  patches  submiXed  by  users  

•  Several  users/companies  using  Mobicents  Diameter  for  Interoperability  TesKng  (IOT)  successfully  and  contribuKng  components  (not  all  complete):  •  Rx  ApplicaKon  Stack  Support  and  Resource  Adaptors  •  Gx  ApplicaKon  Stack  Support  and  Resource  Adaptors  •  Gq’  ApplicaKon  Stack  Support  and  Resource  Adaptors  •  S6a  ApplicaKon  Stack  Support  and  Resource  Adaptors  

Community:  Releases  

Compliance,  Performance  &  Stability  Enhancements  •  Improved  Online/Offline  Charging  API  •  1000+  requests/second  

•  7x  Performance  Improvement:  7000+  Requests/second  •  Gx  ApplicaKon  Support  •  DicKonary/Validator  available  to  applicaKons  

•  Performance  Improvement:  ~8500  Requests/second    •  Improved  Cluster  Support  (Fine  Graining  Replicated  Data)  •  Reworked  DicKonary/Validator  Format  

•  Gq’  ApplicaKon  Support  •  Diameter  Agent  Support  •  Extended  testsuite  (100+  JUnit  Tests  added)  

•  Rx  ApplicaKon  Support  •  Improved  ApplicaKon  Session  Management  

Community:  Overview  •  2300  downloads  since  last  year  

1.3.2.FINAL  

1.3.3.FINAL   1.4.0.BE

TA1  

1.4.0.BE

TA2  

1.4.0.CR

1  

Roadmap:  2011/12  Preview  •  No  major  concerns  with  stack  performance,  good  enough!  •  Try  to  improve  the  performance  os  SLEE  RAs,  which  is  not  so  good  

•  Support  TLS  and  IPSec  security  •  Integrate  with  Mobicents  Load  Balancer  •  Create  integraKon  example  with  B2BUA  both  for  JAIN  SLEE  and  MSS,  in  single  node  and  clustered  environment  

•  Improve  Agent  support,  integraKng  proxy  as  stack  feature  instead  of  support  through  applicaKon  

•  Support  SCTP  transport  

Roadmap:  Releases  •  1.4.0.CR2  _  December  2011  •  Diameter  S6a  Support  (Stack  and  JAIN  SLEE)  •  Diameter  Agent  ConfiguraKon  

•  1.4.0.FINAL  _  March  2012  •  IPSec/TLS  Support  •  Stack  Development  DocumentaKon  

•  1.4.1.FINAL  _  June  2012  •  Integrate  with  Mobicents  Load  Balancer  •  IntegraKon  with  JAIN  SLEE  B2BUA  (eventually  MSS  too)  

•  1.4.2.FINAL  _  September  2012  •  Pluggable  Diameter  Load  Balancing  algorithms  •  HSS  

Questions?