FULL PROFILE

Thanks for dropping by.  The blogger’s name is Push Bhatkoti and he’s a technical consultant specializing in enterprise voice/security, data center and new technologies, with a keen interest in all things bigdata.  This blog is intended as a forum for technical discussion, and as such requires people like yourself to join in with comments and keep the discussion lively and on track.  Opinions that blogger has expressed on this website are his own personal opinions and do not necessarily represent the opinions of any of my past, present and future employers.

0. BACKGROUND

The blogger holds triple CCIE and a double Masters degree. He is also a strong supporter of the open source community. He has an interest in porting the Linux kernel and writing device drivers for AMD/i86 boards. He has been using Linux as his primary desktop for the last 6 years. In free time (when he’s not playing tennis or bush walking), he loves to port the Linux kernel on different boards. These days he  is addicted to netFPGA. This is way mind boggling!

For a living, he is an IT Technical Consultant based in Sydney, Australia. He’s an expert in various domains in IT and Telecommunications.

1. MAJOR ACHIEVEMENTS:

  • V-BLOCK based Teleco grade Cloud – Lead Engineer (design and implementation)
  • Large Distributed IP Telephony Clusters – 8K to 70K handsets.
  • Architectures 37 nodes Hadoop cluster for parallel data processing (extensively used Hbase & MapReduce).
  • A few large scale GetVPN deployment
  • Personal OpenFlow project – Successfully ported the custom Tiny kernel using BuildRoot on an ARM board and now doing some custom development in userspace (porting Quaga, sFLOW ipFlow and other networking protocols). This is what keeps him busy and off the street when he has nothing to do.
    Update# (Nov2013) – I have put my openflow project on hold, decided to do third CCIE.  (This is now completed – here is the story)
  • Update#1 (March2014)– I have started PhD (In Machine Learning)
  • Update#2 (Jan 2014) – Completed my first year of PhD and now into the second year.

2. ACADEMIC QUALIFICATIONS:

  • 2014 – Started PhD Journey!
  • 2006-2007 – Charles Stuart University, Australia
    Master Degree in Networking and System Administration (with Distinction, GPA 6/7)
  • 2000-2001 – CCS University, India
    Master degree in Statistics/Micro Economics

3. TECHNICAL QUALIFICATIONS:

  • Cisco Certified Internetwork Expert (CCIE) – Service Provider (v3) #21569
  • Cisco Certified Internetwork Expert (CCIE) – Security #21569
  • Cisco Certified Internetwork Expert (CCIE) – Voice #21569
  • Cisco Data Centre Unified Computing Support Specialist (DCUCI)
  • Alvarion Certified WIMAX Engineer (ACWE) – 802.16d and 802.16E
  • Sun Certified System Administrator (SCSA) – Solaris 8.0
  • Check Point Certified Security Administrator (CCSA) – Checkpoint 3x
  • Cisco Secure PIX Firewall Advance (CSPFA)
  • Cisco Certified Design Professional (CCDP)
  • Cisco Certified Design Associate (CCDA)
  • Cisco Certified Network Professional (CCNP)
  • Cisco Certified Network Associate (CCNA)
  • Microsoft Certified System Engineer (MCSE) – NT 4.0
  • ITIL v3 certified (Foundation)
  • Diploma course in Computer Software programming (1 year)

4. COURSES AND TECHNICAL SEMINARS

  • Attended Cisco-Live Melbourne 2012.
  • Attended Cisco UCS training on “DCUCI” course – 2 days in 2010.
  • Attended VMware Site Recovery Manager (SRM) course – 2 days in 2010.
  • Attended Cisco Networkers 2009 in Brisbane.
  • Attended VMware High Availability (HA & FT) course – 3 days in 2010.
  • Attended Hands on Workshop on Cisco WAAS solution – 1 week in 2007.
  • Attended Expand WAN Accelerator training – 2 days in 2006.
  • Attended Radware Load Balancer (Link-Proof/Defence-Pro) training – 3 days in 2006.
  • Attended RAD products hands on workshop in Vietnam – 1 week in 2005.
  • Attended MPLS Advance Switching Course from Geneva, Switzerland – 2 weeks in 2003.
  • Attended Linux world 2003, New Delhi, India – 3 days in 2003.

 5. TECHNOLOGY SKILL MATRIX:

AREA OF SKILL SCALE SKILLLEVEL REMARKS
Security 10 8 IPSEC, DMVPN, Get-VPN, EZVPN, IPS, IDS, HIDS, NIDS and compliance (PCI, ISO27xxx) antivirus, SIEM, endpoint security & dot1xPen Testing and SAN security.
IPTEL / Voice/Contact Centre 10 9 CUCM up to Version 8.6(2a), Unity, GW/GK, Asterisk, Presence, Microsoft Lync, Tele Presence, and Telco grade class 5 Soft-switch.
Routing & Switching 10 7 800 series to ASR1xxx & 29xx to Nexus 7K.
Cloud Computing (XaaS) 10 7 V-BLOCK
Storage & SAN 10 8 EMC & Cisco/Brocade
Windows & *NIX 10 7 Very strong in *.NIX, shell scripting.
Virtualization 10 7 VMware, XEN and some HiperV experience
Digital Media System & CMS 10 8 Cisco Kit – DMM and DMPs
WAN Optimization and Load Balancer 10 8 F5, Cisco and Brocade Load Balancers, iRULE.Expand, Riverbed & Cisco WaaS
Traditional Switching SDH/PDH/CWDM/DWDM 10 8 Primary, Secondary and tertiary Multiplexing over CWDM/DWDM.
WIMAX, WIFI & Backhaul radio 10 7 Alvarion WIMAX kit, Ceregon and Cisco WIFI

 

6. THINGS THAT I DON”T LIKE:

  • Manually rolling up the hose after it has been used for a wash
  • White listing mail server from RBL list.
  • Cooking (well, loves eating though :))
  • Domestic talk on the Christmas & Boxing day.
  • …..?
  • ……………………. ?


7. MILESTONES:

8. CONTACT INFORMATION 
E-MAIL                                  FACEBOOK                                                         LINKEDIN
p@bhatkoti.com                    www.facebook.com/pbhatkoti                              http://www.linkedin.com/in/pushbhatkoti
Comments
  1. Emm Nipur says:

    Gr8 profile, very telented man you are…
    keep it up man.

  2. Mark Cardwell says:

    I am not sure of you statement on the GUI and it beign a $1400 lunch. There is no issue that cntrl-shift ^^ x will not fix if stuck in the endless looping or if you need to do a “no aaa new-model” to clear out username. Please expand

  3. pushkarbhatkoti says:

    Hi Mark,
    I mean, imagine a situation when you can’t initialize a GUI of CUE and youv’e to create the mailboxes in CUE for CME users. In that situation if you knew the CLI, u won’t care about GUI to be initialize fist to create just those mailboxes.

    on top of that, CUE has about 10-15 points in the lab, if it’s not initialized you’ve very thin chances to pass coz 100-15 = 85 points to play with. That why I said using GUI to configure CUE could cost you $1400 in return u will get just a lunch.

    HTH

    -push

  4. John says:

    Pushkar is your email address active?

  5. pushkarbhatkoti says:

    Hi Johnbhai,
    Yeah, thanks for reminding me. There was slightly typo. Now its corrected!!

    Cheers
    -push

  6. Juan says:

    Hello Pushkar,

    Great great blog. For us running for the CCIE in Voice there is a lot of useful information. Actually regarding the 10 minute QoS configuration I had a doubt: You mention something that BR2, when initializes the call, the siganling goes over the WAN and never comes from the LAN, where the policy for marking is. How you can solve this issue of marking H323 signaling packets to go out the proper value?

  7. pushkarbhatkoti says:

    its a quiz for you to solve this problem.
    I know how..to..

    -push

  8. Feroz Khan says:

    Hi Pushkar,

    Great Job, I know your Skills and No doubt you Deserve it, Congratulation Brother.

    Rgds,
    Feroz

  9. John says:

    Thank you for sharing your information. This is best I have found on the internet. You certainly have done very well for yourelf. Best Wishes

  10. Prateek Pandey says:

    U hv a good knowledge. Can I ask any question related to subject when I want. Rgds – Prateek, Delhi, India

  11. pushkarbhatkoti says:

    Hi Prateek,
    I’d happy to answer your quesiton, please go ahead and ask.

    -push

  12. John says:

    Hi Pushkar
    I have a quick question wrt to VPIM. I have the same issue that you have written about: Message arriving late. I am not very clear about how to solve this. By chance can you let me know steps to resolve this one?
    Thanks
    John

  13. karuna says:

    Hi Pushkar,
    great site and thanks for the sharing the information, I have one doubt in hiding the Corp Directory users, can u help me.?
    Karuna

  14. karuna says:

    Hi Pushkar,
    great site and thanks for the sharing the information, I have one doubt in hiding the Corp Directory users, can u help me.?

    Karuna

    • pushkarbhatkoti says:

      good question.
      i am not sure about ccm5/6/7x but in previous 4 or 3 with DC directory or AD integrated you can hide users (not the whole address book though.

      Cheers

  15. German says:

    Hey PUSH, i tried to contact you by email but u dissapear from my contacts.
    I finnaly got my CCIE Voice in June 1st.
    Just to say THANK YOU for all the tips and support in your great blog.

    Keep in touch buddy. You need to take some vacations one of these days, and come to my country.

    Regards.

    • pushkarbhatkoti says:

      hey buddy,
      congratulation on your great success. I’m glad to know that you have finally got it.

      Enjoy your number and don’t forget to send me a postcard !!
      duh!

      -Push

  16. Admond Frank says:

    Hello Pushkar,
    I have worked with you in the past in Melbourne. I found your blog incredible centric to practical experience. I am amazed that you have passed the lab exam in 9 months time.

    Well done, this will be my 7th attempt. I am not sure why I am failing. I do the lab in 5-6 hours but still failing.

    Keep the good work and thanks for sharing a lot of tips.

    Admond.

    • pushkarbhatkoti says:

      Hey Admond,
      Sorry but I have totally forgot when I met you. Did we met in Telstra center in CBD?

      cheers
      -Push

  17. sheikh says:

    professor Push, after reading you blog i am Speech-less. feel like not born yet. long long way to go for me.

    you had a amazing journey! WOW

  18. syed says:

    Hello,

    Pushkar is there any place where I can ask you some doubts related to call manager express ? and sip trunking ?

  19. oalsayed says:

    Dear Push

    thanks for your blog

    can you help me to rearange my ccievoice lab i will tell what i have and you let me know if i have to add any thing missing and am sure i have many thing missing in my lab .

    my cisco equipment is

    1- 26XM with CUE and 2FXO and 2FXS work as CME with 1 fasteithernet

    1- VG200 router with 1 eithernet
    1- 2600 router with 1 fasteithernet
    1-3500 24 PoE
    1-3500 24
    1-3500 48
    2-ip phone 7940
    1-ip phone 7960G
    1-ip phone 7902 for sip

    this is my small lab i will by one PC with 8g memory to use it with vmware for all the 5 application

    am waiting for your help

    thanks

  20. Randy Mills says:

    As of last week when our building had taken a power hit,it seems as if intermittant,however widespread issues are happening with the call control.When a person regardless of device type 7941 and or 7961 the hear the phone ringing and they attempt top answer the call has a busy signal on the other end and also the actual rig tone continues as well.Unfortunately I have also had complaints for about busy calls this morning.I have copied a smal trace of the 3845 Gateway attached below:ug 15 16:52:41.172: ISDN Se1/0/0:23 Q931: RX <- FACILITY pd = 8 callref = 0x016D
    Facility i = 0x9F8B0100A117020101020100800F48454E444552534F4E204544574152
    Protocol Profile = Networking Extensions
    0xA117020101020100800F48454E444552534F4E204544574152
    Component = Invoke component
    Invoke Id = 1
    Operation = CallingName
    Name Presentation Allowed Extended
    Name = HENDERSON EDWAR
    Aug 15 16:52:42.980: ISDN Se1/0/0:23 Q931: RX CALL_PROC pd = 8 callref = 0x816E
    Channel ID i = 0xA9838B
    Exclusive, Channel 11
    Aug 15 16:52:43.020: ISDN Se1/0/0:23 Q931: TX -> ALERTING pd = 8 callref = 0x816E
    Aug 15 16:52:43.336: ISDN Se1/0/0:23 Q931: RX CONNECT pd = 8 callref = 0x816E
    Aug 15 16:52:43.956: ISDN Se1/0/0:23 Q931: RX DISCONNECT pd = 8 callref = 0x816A
    Cause i = 0x8090 – Normal call clearing
    Aug 15 16:52:47.884: ISDN Se1/0/0:23 Q931: RX RELEASE_COMP pd = 8 callref = 0x816A
    Aug 15 16:52:48.012: ISDN Se1/0/0:23 Q931: RX CALL_PROC pd = 8 callref = 0x816F
    Channel ID i = 0xA98387
    Exclusive, Channel 7
    Aug 15 16:52:48.024: ISDN Se1/0/0:23 Q931: TX -> ALERTING pd = 8 callref = 0x816F
    Aug 15 16:52:48.028: ISDN Se1/0/0:23 Q931: TX -> PROGRESS pd = 8 callref = 0x816F
    Progress Ind i = 0x8181 – Call not end-to-end ISDN, may have in-band info
    Aug 15 16:52:48.032: ISDN Se1/0/0:23 Q931: TX -> CONNECT pd = 8 callref = 0x816F
    Aug 15 16:52:48.048: ISDN Se1/0/0:23 Q931: TX -> DISCONNECT pd = 8 callref = 0x816F
    Cause i = 0x80A6 – Network out of order
    Aug 15 16:52:48.056: ISDN Se1/0/0:23 Q931: RX STATUS pd = 8 callref = 0x816F
    Cause i = 0xC0E50F – Message not compatible with call state
    Call State i = 0x0B
    Aug 15 16:52:48.080: ISDN Se1/0/0:23 Q931: RX RELEASE_COMP pd = 8 callref = 0x816F
    Aug 15 16:52:49.608: ISDN Se0/0/0:23 Q931: pak_private_number: Invalid type/plan 0x0 0x0 may be overriden; sw-type 2
    Aug 15 16:52:49.608: ISDN Se0/0/0:23 Q931: Applying typeplan for sw-type 0x2 is 0x2 0x1, Calling num 9728287733
    Aug 15 16:52:49.608: ISDN Se0/0/0:23 Q931: Applying typeplan for sw-type 0x2 is 0x0 0x0, Called num 8007775050
    Aug 15 16:52:49.612: ISDN Se0/0/0:23 Q931: TX -> SETUP pd = 8 callref = 0x1C97
    Bearer Capability i = 0x8090A2
    Standard = CCITT
    Transfer Capability = Speech
    Transfer Mode = Circuit
    Transfer Rate = 64 kbit/s
    Channel ID i = 0xE9848396
    Exclusive, Interface 4, Channel 22
    Net Specific Fac i = 0x00E1
    Calling Party Number i = 0x2181, ‘9728287733’
    Plan:ISDN, Type:National
    Called Party Number i = 0x80, ‘8007775050’
    Plan:Unknown, Type:Unknown
    Aug 15 16:52:49.668: ISDN Se0/0/0:23 Q931: RX <- CALL_PROC pd = 8 callref = 0x9C97
    Channel ID i = 0xE9848396
    Exclusive, Interface 4, Channel 22
    Aug 15 16:52:49.668: ISDN Se0/0/0:23 Q931: RX DISCONNECT pd = 8 callref = 0x1C97
    Cause i = 0x80A6 – Network out of order
    Aug 15 16:52:49.728: ISDN Se0/0/0:23 Q931: RX RELEASE_COMP pd = 8 callref = 0x1C97
    Aug 15 16:52:52.997: ISDN Se1/0/0:23 Q931: TX -> CONNECT pd = 8 callref = 0x816D
    Aug 15 16:52:53.017: ISDN Se1/0/0:23 Q931: RX <- CONNECT_ACK pd = 8 callref = 0x016D
    Aug 15 16:52:53.017: %ISDN-6-CONNECT: Interface Serial1/0/0:9 is now connected to 9725712106 N/A
    Aug 15 16:52:53.017: %ISDN-6-CONNECT: Interface Serial1/0/0:9 is now connected to 9725712106 N/A
    Aug 15 16:52:53.017: %ISDN-6-CONNECT: Interface Serial1/0/0:9 is now connected to 9725712106 N/A
    Aug 15 16:52:53.137: ISDN Se1/0/0:23 Q931: RX CALL_PROC pd = 8 callref = 0x8170
    Channel ID i = 0xA98387
    Exclusive, Channel 7
    Aug 15 16:52:53.173: ISDN Se1/0/0:23 Q931: TX -> ALERTING pd = 8 callref = 0x8170
    Aug 15 16:52:53.645: ISDN Se1/0/0:23 Q931: RX <- FACILITY pd = 8 callref = 0x0170
    Facility i = 0x9F8B0100A117020101020100800F574952454C4553532043414C4C4552
    Protocol Profile = Networking Extensions
    0xA117020101020100800F574952454C4553532043414C4C4552
    Component = Invoke component
    Invoke Id = 1
    Operation = CallingName
    Name Presentation Allowed Extended
    Name = WIRELESS CALLER
    Aug 15 16:52:54.917: ISDN Se1/0/0:23 Q931: RX CALL_PROC pd = 8 callref = 0x8171
    Channel ID i = 0xA9838C
    Exclusive, Channel 12
    Aug 15 16:52:54.929: %ISDN-6-CONNECT: Interface Serial1/0/0:9 is now connected to 9725712106 N/A
    Aug 15 16:52:54.933: ISDN Se1/0/0:23 Q931: TX -> DISCONNECT pd = 8 callref = 0x8171
    Cause i = 0x80AF – Resource unavailable, unspecified
    Aug 15 16:52:54.957: ISDN Se1/0/0:23 Q931: RX RELEASE_COMP pd = 8 callref = 0x8171
    Aug 15 16:52:55.053: ISDN Se1/0/0:23 Q931: RX RELEASE pd = 8 callref = 0x816D
    Aug 15 16:52:55.077: ISDN Se1/0/0:23 Q931: RX <- RELEASE_COMP pd = 8 callref = 0x016D
    Aug 15 16:52:55.453: ISDN Se1/0/0:23 Q931: RX CALL_PROC pd = 8 callref = 0x8172
    Channel ID i = 0xA9838A
    Exclusive, Channel 10
    Aug 15 16:52:55.489: ISDN Se1/0/0:23 Q931: TX -> ALERTING pd = 8 callref = 0x8172
    Aug 15 16:52:55.657: ISDN Se1/0/0:23 Q931: RX CALL_PROC pd = 8 callref = 0x8173
    Channel ID i = 0xA9838C
    Exclusive, Channel 12
    Aug 15 16:52:55.673: ISDN Se1/0/0:23 Q931: TX -> DISCONNECT pd = 8 callref = 0x8173
    Cause i = 0x80AF – Resource unavailable, unspecified
    Aug 15 16:52:55.677: ISDN Se1/0/0:23 Q931: TX -> CONNECT pd = 8 callref = 0x816C
    Aug 15 16:52:55.697: ISDN Se1/0/0:23 Q931: RX <- CONNECT_ACK pd = 8 callref = 0x016C
    Aug 15 16:52:55.697: %ISDN-6-CONNECT: Interface Serial1/0/0:8 is now connected to 5123539100 N/A
    Aug 15 16:52:55.701: %ISDN-6-CONNECT: Interface Serial1/0/0:8 is now connected to 5123539100 N/A
    Aug 15 16:52:55.701: %ISDN-6-CONNECT: Interface Serial1/0/0:8 is now connected to 5123539100 N/A
    Aug 15 16:52:55.701: ISDN Se1/0/0:23 Q931: RX RELEASE_COMP pd = 8 callref = 0x8173
    Aug 15 16:52:55.901: ISDN Se1/0/0:23 Q931: RX <- FACILITY pd = 8 callref = 0x0172
    Facility i = 0x9F8B0100A117020101020100800F434953434F2053595354454D532020
    Protocol Profile = Networking Extensions
    0xA117020101020100800F434953434F2053595354454D532020
    Component = Invoke component
    Invoke Id = 1
    Operation = CallingName
    Name Presentation Allowed Extended
    Name = CISCO SYSTEMS
    Aug 15 16:52:55.937: ISDN Se0/0/0:23 Q931: RX CALL_PROC pd = 8 callref = 0x83D0
    Channel ID i = 0xE980838C
    Exclusive, Interface 0, Channel 12
    Aug 15 16:52:55.949: ISDN Se0/0/0:23 Q931: TX -> DISCONNECT pd = 8 callref = 0x83D0
    Cause i = 0x80AF – Resource unavailable, unspecified
    Aug 15 16:52:56.009: ISDN Se0/0/0:23 Q931: RX RELEASE_COMP pd = 8 callref = 0x83D0
    Aug 15 16:52:56.249: ISDN Se1/0/0:23 Q931: RX CALL_PROC pd = 8 callref = 0x8174
    Channel ID i = 0xA9838C
    Exclusive, Channel 12
    Aug 15 16:52:56.261: %ISDN-6-CONNECT: Interface Serial1/0/0:8 is now connected to 5123539100 N/A
    Aug 15 16:52:56.261: ISDN Se1/0/0:23 Q931: TX -> DISCONNECT pd = 8 callref = 0x8174
    Cause i = 0x80AF – Resource unavailable, unspecified
    Aug 15 16:52:56.277: ISDN Se1/0/0:23 Q931: RX RELEASE_COMP pd = 8 callref = 0x8174
    Aug 15 16:52:56.625: ISDN Se1/0/0:23 Q931: RX <- SETUP pd = 8 callref = 0x0175
    Bearer Capability i = 0x8090A2
    Standard = CCITT
    Transfer Capability = Speech
    Transfer Mode = Circuit
    Transfer Rate = 64 kbit/s
    Channel ID i = 0xA9838C
    Exclusive, Channel 12
    Facility i = 0x9F8B0100A10F02010106072A8648CE1500040A0100
    Protocol Profile = Networking Extensions
    0xA10F02010106072A8648CE1500040A0100
    Component = Invoke component
    Invoke Id = 1
    Operation = InformationFollowing (calling_name)
    Name information in subsequent FACILITY message
    Progress Ind i = 0x8283 – Origination address is non-ISDN

    • Hello there,
      Obviously, I was hibernated so I hope you’ll understood why I am replying so late 🙂

      Cause i = 0x80AF – Resource unavailable, unspecified

      This is typically problem with the far end where you are connected to. i.e. service provider/telecom network switch.

  21. Naveen Kumar says:

    I went through your profile and some example configuration, i wondered, how can one person do lot’s of things in his life.
    I think you are a ideal for new generation those want to do something in Network or IT field.

    • Hi Naveen,
      Thanks for the comments.
      It’s really depends what any individual want to do in their life.
      My theory is , pickup your hobbie that you really love and you have never have to work for anyone!

  22. Kailash Rawat says:

    Hi Harish
    Keep it up

  23. rupamchakraborty83.blogspot.com says:

    Hi Pushkar

    I have been working voice voice domain for quite a long time. and i want to thank you for your wonderful blog . many time it had helped me in solving issue i faced during my job.

  24. Ashik Zaman says:

    Hey Push, good to see see your blog buddy and will be plugging in often from now on 🙂

  25. Bharath R says:

    Hi Push,

    I have started my carieer as VoIP Engineer just 2 years back, today I was searching for MVA Call Flow, Got your blog…Its very interesting…I will be keep in touch for any clarifications related to Unified Communication…Very impressive blog I have ever seen

  26. Ganga says:

    Guys any update on this Issue

    Aug 15 16:52:55.949: ISDN Se0/0/0:23 Q931: TX -> DISCONNECT pd = 8 callref = 0x83D0
    Cause i = 0x80AF – Resource unavailable, unspecified
    Aug 15 16:52:56.009: ISDN Se0/0/0:23 Q931: RX RELEASE_COMP pd = 8 callref = 0x83D0
    Aug 15 16:52:56.249: ISDN Se1/0/0:23 Q931: RX CALL_PROC pd = 8 callref = 0x8174

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