Srikanth Nellapally
Hyderabad
Summary
Senior Tech Specialist with extensive experience at AT&T, specializing in Cisco and Juniper networking. Successfully transformed legacy systems to SD-WAN, resulting in improved connectivity and enhanced security. Strong problem-solving and communication skills facilitate effective client interactions and project success. Dedicated to delivering innovative solutions that enhance network performance and reliability.
Overview
12
12
years of professional experience
1
1
Certification
Work History
Sr. Tech Specialist
AT&T Global Business Services India Pvt. Ltd
05.2022 - Current
- Client: Siemens Energy & Siemens Gamesa
- Devices & Tools Used: Cisco Routers, Switches, Juniper MIST, Juniper Switches, Junipers APs Broadcom VMware (SDWAN Velo Cloud), Vyata Routers, DDI Infoblox, Fortigate Firewall, MS-Visio, Microsoft Excel, Word, Power Point; Netbrain, Action web, GPS, ARMT, Business Direct
- Team Size: 4
- Role: Sr. Tech Specialist
- Duration: May 2022 to present
- Project Description: Siemens Energy was created in 2020 through a spin-off from the Siemens Group and bundles solutions for power generation, power transmission and industrial solutions in both conventional and renewable energies in its product portfolio. As an independent company, Siemens Energy is now in the process of transforming its IT landscape. A central component of this process is the provision of holistic, future-proof, and secure connectivity services as the cornerstone of the future IT architecture for Siemens Energy. To achieve this Siemens Energy plans to transform all communication services into a Secure Access Service Edge (SASE) environment.
- Roles & Responsibilities:
- Act as the single point of contact for client needs from service delivery perspective.
- Interface with all the AT&T towers and vendors (if applicable) and have a comprehensive understanding of the operational environment. Formulate and document all physical and logical details of the proposed or changed network (SDP's). Provide engineering and technical support for data MACDs/Projects.
- Support all transition, transformation, and day-2 MACDs from service delivery perspective.
- Participating in implementation of SD-WAN topologies, Juniper LAN/WIFI and MIST connectivity
- Consulting with various AT&T and client technology support groups as part of SD-WAN design, development and implementation from Multi Services Engineering perspective.
- Developing detailed low-level designs for DCs & new sites articulating complex design nuances and technical specifications to team
- Contributing to SD-WAN and Juniper LAN/WIFI solutions development, optimizations, corporate standards and technology refresh efforts.
- Supporting hardware and software upgrades and validate infrastructure functionality.
- Participating in formulation of technical action plans for analysing and resolving SD-WAN and Juniper LAN/WIFI problems.
- Conducting through analysis of customer requirements, creating, and executing comprehensive implementation plan tailored to those needs.
- Project-1: Siemens
Sr. Tech Specialist
AT&T Global Business Services India Pvt. Ltd
11.2020 - 03.2022
- Client: AES
- Devices & Tools Used: Cisco Routers, Switches, Cisco Viptela, cEdge, vManage, Cisco WLC, Cisco AP’s, Meraki; Netbrain, Action web, GPS, ARMT, Business Direct
- Team Size: 6
- Role: Sr. Tech Specialist
- Duration: November 2020 to March 2022
- Project Description: The AES Corporation is a Fortune 500 global energy company that owns and operates regional utilities and develops renewable energy projects, including forms of clean energy generation (including solar and wind) as well as distribution, energy.
- AES is headquartered in Arlington, Virginia, and is one of the world's largest power companies, generating and distributing electricity in 14 countries and employing more than 8,000 people worldwide.
- All Legacy Setup will be transformed to SDWAN (Cisco Viptela)
- AES has 7 New Datacentres, within region overly full mesh in SDWAN With region traffic is Any to Any but inter region should go via Primary DC Resiliency at critical sites with High Availability.
- Infoblox setup in 3 regions (North America, EMEA & South America) DHCP services centralised.
- AVTS for remote user connectivity.
- Local Internet breakouts in remote sites.
- ISE implementation
- ZScalar setup
- Cloud Services at the US Region DC.
- Roles & Responsibilities:
- Walkin takeover - go through existing customer network and implement required changes to make devices under AT&T management.
- Transform the Legacy sites to SDWAN. Build the legacy diagram, discuss the planned phases with customer and make a plan to strategically move it to SDWAN and implement the changes.
- Outlier Sites – Worked on Outliers sites, build the plan to move to SDWAN and implement.
- Work on SDWAN technology i.e., cEdge & vManage.
- Prepare Runbook for plan of action during activity.
- DDI_DHCP Project – co-lead role for DDI DHCP migration of all AES locations to AT&T managed Infoblox
- Working with multiple internal teams/products - MSS, DDI, AVTS, SDWAN, MLAN DTAC & LE.
- Worked on WLC and AP’s
- Refresh Project - Replace the EOL devices and AP’s.
- AVTS Project – Provide the connectivity for the AVTS and take care of routing.
- BOM – Build the BOM for sites.
- Prepared various testing plans for Latency tests.
- DataCenter – Internet Circuit provisions (ADIG / AIA)
- Project-2: AES
Sr. Tech Specialist
AT&T Global Business Services India Pvt. Ltd
04.2020 - 10.2020
- Client: McDonald’s
- Devices & Tools Used: Cisco Routers, Switches, Firewall
- Team Size: 6
- Role: Sr. Tech Specialist
- Duration: April 2020 to October 2020
- Project Description: McDonald's is the world's largest American fast-food company.
- Global Network Transformation (GNT) is a strategic initiative within McDonalds to transform the MPLS/VPN based Global Enterprise Network to a Zero Trust based access model to have more visibility and access control, while increasing the agility and introducing automation to optimize network operation activities. The approach McDonald’s has adopted to meet GNT objectives, is to lay the foundation for transitioning the existing McDonald’s Enterprise network infrastructure to Carrier Neutral Facilities (CNF). Six fully redundant CNFs with two in each of the three McDonald’s “Regions” (NA, EU, APMEA) are to be provisioned to meet the objectives.
- All remote locations will pass through CNF locations within its region.
- CNFs will have a full-mesh overlay defined between CNFs.
- Spoke-to-spoke tunnels will only be created/allowed under certain limited circumstances.
- All traffic must traverse a CNF location and its firewall for inspection prior to forwarding.
- A HA pair of firewalls will be located within each CNF and be service chained (service insertion) to the Viptela hub devices.
- Each CNF location will utilize Equinix Cloud eXchange (ECX) for connectivity to cloud providers.
- All traffic – including spoke-to-spoke, spoke to CSP, and CSP to CSP must flow through the firewalls.
- Inter-region traffic will (most-likely) traverse two CNFs including two firewall inspections.
- Roles & Responsibilities:
- It’s a New Data Centre setup for the customer in 3 regions (US, EMEA & APAC)
- Each region has 2 Data Centres for redundancy.
- US - CHICAGO & ASHBURN; EMEA – AMSTERDAM & FRANKFURT. APAC – SINGAPORE & HONGKONG.
- These Data Centres are hosted in EQUINIX DC, where customer has also opted for Cloud Service Providers (CSP: AZURE & AWS)
- Worked Closely with Customer & Architect in the Design Setup and Implementation.
- Built the DC’s Setup from foundation which includes BOM Verification, Cable’s essentials, Cabinet & Racks planning, AT&T standard IOS, license install and also planning & implementation of various BUILD & FAILOVER tests to verify redundancies.
- Worked with the Lead Architect & Team Lead to develop Change scripts, Design improvisation & Flow diagrams for successful completion of Network setups.
- Maintain and update the Latest Visio Designs.
- Maintaining the IP Address sheet for the customer.
- Worked with EQUINIX & Client for Cloud Services.
- Prepared RUN/PLAYBOOK.
- Project-3: McDonald’s
Sr. Tech Specialist
AT&T Global Business Services India Pvt. Ltd
04.2019 - 03.2020
- Client: SYSCO FOODS
- Devices & Tools Used: Cisco Routers, Switches, Aruba AP, ANIRA, Sentry Commander Netbrain, Service Manager, ARMT, Vitalnet, Action Web & GPS
- Team Size: 12
- Role: Sr. Tech Specialist
- Duration: April 2019 to March 2020
- Project Description: Sysco Corporation (Systems and Services Company) is an American multinational corporation involved in marketing and distributing food products, smallwares, kitchen equipment and tabletop items to restaurants, healthcare and educational facilities, hospitality businesses like hotels and inns, and wholesale to other companies that provide foodservice (like Aramark and Sodexo). The company is headquartered in the Energy Corridor district of Houston, Texas.
- Transformation Program includes the following components:
- WAN Transport – Install 233 AVPN circuits.
- ANIRA broadband access – Install 407 AT&T broadband gateways and access circuits in branches.
- MRS with partial refresh of the EOL routers. EOL status is based on manufacturer’s policy. 233 routers to be managed with approximately 136 to be refreshed.
- Branch LAN – partial refresh of the EOL hardware. EOL status is based on manufacturer’s policy. Approximately 1300 switches to be refreshed.
- Wireless LAN – implement an Aruba solution with approximately 6500 WAPs.
- Unified Communications – Implement Cisco-based VOIP solution.
- Total number of sites in scope is 504, divided into following Site Types.
- Tier 1 – Large offices and Data Centers. 14 sites in total, including 8 Data Centers.
- Implement fully redundant and resilient WAN connectivity with dual routers and MPLS AVPN circuits.
- Tier 2 – Mid-size branches. 122 sites in total.
- Implement a single MPLS AVPN circuit and refresh existing router, if EOL.
- Implement a backup connection via ANIRA broadband solution.
- Refresh LAN equipment, if needed
- Implement the WLAN solution.
- Implement the UC VOIP solution.
- Tier 3 – Small branches. 83 sites in total
- Implement a single MPLS AVPN circuit and refresh existing router, if EOL.
- Refresh LAN equipment, if needed
- Implement the WLAN solution.
- Implement the UC VOIP solution.
- Tier 4 – Home offices. 285 sites in total.
- Implement ANIRA broadband solution as replacement for the current WAN or IP-VPN access.
- Roles & Responsibilities:
- Part of LAN Transformation team, where transformed the existing sites to New setup in US & CANADA regions.
- Prepare the new network VISIO diagram for the customer site, which includes WAN, LAN, ANIRA, AP & Voice devices.
- IP Planning & Design as per the AT&T Standard.
- Once the Logical Design is approved by the customer, prepare the CUT-OVER scripts.
- Work with AT&T Field tech team during the activity in implementing the scripts and troubleshoot the issues.
- Design the setup in Netbrain, take backups and compare.
- Prepared RUN/PLAYBOOK
- Update RF workbook with AP’s connectivity to the respective switches and ports.
- Design devices placement in the Cabinet.
- Work with customer to update the new IP’s and ports for the IOT devices.
- Validation of DHCP Scopes.
- Project-4: SYSCO FOODS
Technical Specialist
AT&T Global Business Services India Pvt. Ltd
08.2017 - 03.2019
- Client: IBM IGA and commercial clients
- Tools Used: GPS, ServiceNow, Maximo, AOTS-UD, Remedy, Cisco & Switches, Vitalnet, Riverbed Steelhead, Wireless Controller & Access Points, Big IP F5 load balancers, Wireshark, Nexus Devices (N2K, N3k, N5K, N7K)
- Team Size: 20
- Role: Technical Specialist
- Duration: August 2017 to March 2019
- Project Description: IBM Global Services, a division of IBM, is the world's largest business and technology services provider. It employs over 190,000 people across more than 160 countries. IBM Global Services started in the spring of 1991, with the aim towards helping companies manage their IT operations and resources. Global Services has two major divisions: Global Business Services (GBS) and Global Technology Services (GTS). GTS is the leading e-business on demand and hosting services provider, the leader in providing high-availability services, networking services and storage services and also the leader in the emerging wireless services market. We manage IBM’s commercial accounts including its Internal network by providing network services as a part of AT&T-IBM Strategic Partnership called Blue Sky. The accounts are comprised of different domains with Service assurance as well as Service Delivery functionalities. Some of the accounts being Sysco Foods, SouthWest Airlines, Case New Holland Industries, SYSCO Foods, Voya, Discover Financial Services, Syncora, Qwest, Marico etc.
- Roles & Responsibilities:
- Ensure Network reliability and availability as per the agreed SLAs.
- Closely work with account Focal to mentor other technical analysts in supporting the various accounts to ensure technical and process steps.
- Responsible for participating in Outage Review sessions to discuss outage chronologies, determine root cause, and assign tasks for future outage prevention for a RCA/RFO request
- Provides support to act as technical escalation for issues identified during Tier 2/3 incidents for all supported LAN-WAN accounts.
- Deploy and support projects for LAN & WAN
- Work with the Projects Teams to develop change scripts, configure and install network gear at AT&T and customer owned premises as required, within the scope of work defined.
- Configuring and troubleshooting the Routing and switching protocols such as BGP, OSPF, EIGRP, STP, RSTP, HSRP, VRRP, GLBP, Ether channels, VPC etc.
- Maintain and update the Latest Visio Drawings for the Accounts deemed as focal.
- Provide Technical Overviews of technologies they support such as Switches, Routers, WAN optimizers and Load Balancers
- Attend all Critical Service Delivery and Service Assurance meetings; Also support RCA initiatives.
- Provides leadership team about updates on all projects, changes & outages.
- Support change control processes for IMAC support (LMAC-PMAC)
- AT&T Communication services India Pvt Ltd is an American multinational telecommunications company. Which is providing network solutions to various clients.
- Project 5: IBM BlueSky
Tech Specialist
AT&T Communication services India Pvt Ltd
01.2016 - 07.2017
- Client: UBS (Union Bank of Switzerland)
- The client UBS AG, being a very big bank operates from approx. 55 countries across the globe. This comprises of very large and sophisticated network equipment. The whole network infrastructure of UBS is divided into four regions. APAC, EMEA, AMER and SWISS
- Role: Tech Specialist
- Roles and Responsibilities:
- Working on Incidents, raise changes, problem tickets, task tickets.
- Planning, designing and Implementing Site LAN/WAN for high availability.
- Project on Install and configure new network equipment (Routers and/or switches) at new business facilities and remediation for existing sites.
- Multicast setup and troubleshooting.
- Coordinating with different teams and vendors to solve the issues.
- Break-fix activities including device or component replacements, traffic offloading and load balancing, working with multiple vendors to analyse unexpected behaviour of network devices, and to resolve complex cases.
- Network maintenance work such as hardware and software upgrades with minor or no impact to the client’s network.
- Daily Incident and SR management
- Cisco TAC cases
- HP TAC cases
- Other Daily network related tasks
- Representing CAB for the assigned projects.
- Taking Tier II escalations and working on break fix incidents
- TACACS issues, Decommission of Sites, SPAN Sessions, HSRP, VRRP, OSPF, BGP, capacity issues.
- Switch upgrades, Router replacement, DHCP Issues, Cost out the Carrier links.
- 3750 switch upgrades:
- There are 5000+ switches in the organization which has IOS installed. Present IOS has bug in the switches, so we are upgrading all switches with latest bug free IOS. There are so many switches which are server connected switches, so we need to coordinate with server team to upgrade the switches.
- Redistribution of routing protocols, Route-maps (Policy Based Routing), ACL, NAT.
- Troubleshooting of all kinds of application problems, response problems and Customer connectivity issues.
- Design and Implementation of IPSec and GRE over IPSec
- Installing and configuring of Cisco L2 & L3 Switches (29XX, 35XX, 3750 X and 6500).
- Wireless project:
- Installing new wireless setup in various American branches. Installing new access points in the branch and configuring routers and switches to make the access points up and register the access points in wireless controller which is in head end data centre to configure the access points and make the wireless network ready for branch users.
- Configuring Juniper devices for the new server access.
- Project 6: IPDATA
SR. ASSOCIATE TECHNICAL SUPPORT
AT&T
05.2013 - 12.2015
- Client: AT & T
- Role: SR. ASSOCIATE TECHNICAL SUPPORT
- Description: AT & T provides the internet services to the customers in US i.e., Data & Voice.
- Roles and responsibilities:
- Working in a service delivery environment Managed Internet Service (MIS) and PNT (Private network transport) as a senior network engineer.
- Configure CE and PE Router as per the customer required routing method in managed and non-managed services including MIS and PNT with cisco, juniper, BIB(Business In Box) ( AT&T product ) , Fault Isolation & Problem Resolution through service demarcation point.
- Working with ABFS Techs & Circuit testing Engineers to resolve the latency, and circuit down issues.
- Working on Circuits T1, Multilink, Ethernet, DS3, OC12.
- Configuring NAT, DHCP, ACL, BGP, OSPF, EIGRP, Redistribution on the Routers and T-shoot if any issue.
- Coordinating with other internet service providers to migrate the existing public IP block for the customers to AT&T.
- Experience in Hot-cut, bandwidth up-gradation within the scheduled window.
- Implementing and supporting customer LAN networks and configuring and assigning IPv4 and IPv6 for AT&T Customers
- Project 7: DTAC
Education
BSc - Electronics & Computers
Avanthi Group of Colleges
01.2008
XII std - MPC
Narayana Junior College
01.2005
SSC -
Shantiniketan High School
01.2003
Skills
- Communication skills
- Problem solving
- Telephonic and email etiquette
- Stress management
- Adaptability and quick learning
- Positive mindset
- Team collaboration
- Client interaction
- Analytical thinking
- Interpersonal skills
- Technical expertise
- Cisco and Juniper networking
Certification
- Implementing Cisco SD-WAN Solutions, CSCO11920707
- CCNA (640-802), CSCO11920707
- CCNP (R & S), CSCO11920707
- ITIL Service and Incident Management, 90%
- Telecom-Datacom certification, 75%
- IMS Fundamentals of IP Networking Level 1, 80%
- Microsoft Certified Azure Network Engineer Associate - AZ-700
Area Of Expertise
7200, 4451, ASR 1001-X, HX, 3900, 3800, 2800, 1900, 1800, 9300, 9500, 6500, 4500, 3850, 3750, 2900, 9K, 7K, 5K, 3K, 2K, 7124sx, 7150s, 7148sx, MX10, MX40, EX2200, EX3300, OSPF, BGP, EIGRP, RIP, Static, PIM, Multicast, VLAN, VTP, STP, RSTP, MST, VTP, DTP, FHRPs (HSRP, VRRP & GLBP), Etherchannel, SPAN, Aruba Aps 105, 225, Aruba 6000, Cisco CAP2602I, AP2802I, CAP3502E, CAP3702I, AP3802I, BIGIP 8900, Cisco Viptela, Broadcom velocloud, cEdge ISR 4K, cEdge ASR 1K, VCE610, 620, 640, 680, VCE3400, 3800, VCE710, 720, 740, 780, 4100, Fortigate 100F, 200F, NAT, ACL, VLAN filters, access-maps, DHCP snooping, GRE/IPSec, Zscaler Internet Access
Personal Information
- Date of Birth: 1987-10-10
- Nationality: Indian
- Marital Status: Married
Languages
- English
- Telugu
- Hindi
Hobbies and Interests
- Reading books
- Listening to music
- Watching movies
- Playing Chess
- Cricket
Disclaimer
I hereby declare that the above-mentioned information is correct up to my knowledge and I bear the responsibility for the correctness of the above-mentioned particulars.
Timeline
Sr. Tech Specialist
AT&T Global Business Services India Pvt. Ltd
05.2022 - Current
Sr. Tech Specialist
AT&T Global Business Services India Pvt. Ltd
11.2020 - 03.2022
Sr. Tech Specialist
AT&T Global Business Services India Pvt. Ltd
04.2020 - 10.2020
Sr. Tech Specialist
AT&T Global Business Services India Pvt. Ltd
04.2019 - 03.2020
Technical Specialist
AT&T Global Business Services India Pvt. Ltd
08.2017 - 03.2019
Tech Specialist
AT&T Communication services India Pvt Ltd
01.2016 - 07.2017
SR. ASSOCIATE TECHNICAL SUPPORT
AT&T
05.2013 - 12.2015
BSc - Electronics & Computers
Avanthi Group of Colleges
XII std - MPC
Narayana Junior College
SSC -
Shantiniketan High School