Sivasubramanian Chithan

Network Engineer

Number: 732-***-****

Email ID: ac2fbq@r.postjobfree.com

Available for C2C

Professional summary:

Experienced Network Professional with 6+ years in IT organization implementing and supporting enterprise data networks and Service Provider systems

Knowledge of implementing and troubleshooting complex layer 2 technologies such as VLAN Trunks, VTP, Ether channel, STP, RSTP and MST. Implementation of HSRP, VRRP for Default Gateway Redundancy

Experience working on Cisco Catalyst Series 3750, 4500, 4900, 6500;

Experience in layer-3 Routing with, Cisco ASR 9k, ASR1002X, 7200, 3845, 3945, 2811, 1800 series

Expert in configuration of routing protocols and deployment of RIP, OSPF, EIGRP & BGP over Cisco Routers in Production environment

Involved in troubleshooting of DNS, DHCP and other IP conflict problems

Experience in working with Cisco Nexus Switches, Virtual Port Channel configuration and Cisco ASA firewall administration across global networks

Experience with load balancing on F5 LTM, GTM series like 6400, 6800, 8800 for the corporate applications and their availability

Hands on experience in deployment of Frame-Relay, MPLS, PPP

Worked on MPLS-VPN designs for the migration of Frame relay to MPLS system.

Implemented redundancy with HSRP, GLBP, Ether channel technology etc.

Working knowledge of IDS and IPS, policy routing, private VLANs, NAT and ACLs.

IOS upgrades on routers &switches and Installation of SDM

In-depth knowledge and hands-on experience on IP Addressing, Subnet, VLSM,ARP, reverse and proxy ARP, Ping concepts

Maintaining and updating inventory of all network hardware, Management and Monitoring by use of SSH, Syslog, SNMP, NTP

Worked on Network Monitoring tools like Cisco Network Assistant, Solar winds, Wireshark, HP open view.

Efficient in preparing Technical Documentation using Microsoft VISIO/Office

Experience in designing and implementing high availability solutions (dynamic load distribution, redundant connections, dynamic routing protocols, etc.,)

Ability to effectively manage multiple assignments and priorities

Excellent customer management/resolution, problem solving, debugging skills, effectively analyze results and delivering solutions as an individual and as part of a team

Education and Certification:

MS in Telecommunications

CCNA Certified

Technical Skills:

Cisco Router platforms : 2611XM, 2811, 3600, 3745, 3845, 7206, 7609, ASR1002X, ASR9K.

Cisco Switch platforms : Cisco Catalyst 6500, 4000, 3550, 2900.

Firewalls : Cisco ASA 5500, Cisco PIX 500, checkpoint r60, checkpoint r65.

Routing Protocols : BGP, OSPF, EIGRP, IGRP, RIP v1 & v2.

Switching : LAN, VTP, STP, Inter VLAN routing & Multi-Layer Switch, Ether channels, MPLS.

Network Security : Cisco ASA 5540, ACL, IPSEC.

Load Balancer: F5 Networks LTM 6400, 1600.

LAN: Ethernet, Fast Ethernet, Gigabit Ethernet.

WAN: PPP, HDLC, Frame Relay Gateway HSRP, IRDP, NAT, SNMP, NTP, DHCP, TFTP, FTP.

Network Management: Wireshark, SNMP, Ethereal, EMC Smarts.

Operating Systems: Windows (2000, XP, Server 2003/2008, Windows 7), Linux – Ubuntu.

Professional Experience:

Client: Tata Communications, NYC, NY Oct 2015- Present

Network Engineer

Responsibilities:

Assisted in developing overall operational schedules and workload operations.

Involved in determining problems and delivering solutions with a high-level customer satisfaction.

Identify, design and implement flexible, responsive, and secure technology services.

Experience with Firewall Administration, Rule Analysis, Rule Modification.

Managed fast Layer 3 switched/routed LAN/WAN infrastructure as a part of Network team. The LAN consisted of Cisco campus model of Cisco 3550 at access layer, Cisco 6513 at distribution/core layer.

Negotiate VPN tunnels using IPSec encryption standards and configured and implemented site-to-site VPN, Remote VPN.

Installing and configuring the VMware VSphere and creating clusters for High Availability (HA) and Dynamic Resource Scheduling (DRS).

Involved Data Centers design and Implemented. Designed and implemented VMware 5.5 /VCenter 5.5 and SRM 5.8, Zerto 4.0.8 / Windows 2012 R2 / Windows 2008 R2 on Cisco UCSM with 6 domains/34 Chassis/200+ Cisco UCS B 200 M3 blades with VBlock (VCE).

Performing vMotion, Cloning, Snapshot, FT, Update Manger, Host Profile, Manage OS Templates and Multi-pathing.

Installed ESX VMware 5.0/5.5, configure, and maintain server and data store storage systems.

Documented new VPN enrollments in a database and create standard procedures for further improvement.

Troubleshoot traffic passing managed firewalls via logs and packet captures

Cisco ASA/Checkpoint Firewall troubleshooting and policy change requests for new IP segments that either come on line or that may have been altered during various planned network changes on the network.

Responsible for Checkpoint and Cisco ASA firewall administration across global networks.

Generating RCA (Root Cause Analysis) for critical issues of layer1/layer2/layer3 problems.

Co-ordinated with the Data Network and Security team and came up with possible solutions..

Cisco ASA/Checkpoint Firewall troubleshooting and policy change requests for new IP segments that either come on line or that may have been altered during various planned network changes on the network.

Configuration and troubleshooting of Cisco catalyst 6509, 7613 with supervisor cards.

Experience with implementing and maintaining network monitoring systems (Cisco works andHP Open view) and experience with developing complex network design documentation and presentations using VISIO

Monitoring and troubleshooting network issues between client site and remote sites with legacy switches and routers

Performed and presented network analysis as a part of network migration. Involved in knowledge transfer to vendors and provided them network support as required

Configuration and maintenance of EIGRP and BGP network on router 7200 and 6500 MLS.

Client: Cuna Mutual, Madison, WI Nov 2014- Sep2015

Network Support Engineer

Responsibilities:

Implemented LAN/WAN utilizing CISCO 7200, 7204, 7206.

Configured Routing Protocols such as OSPF and policy based routing.

Design OSPF Areas for reliable Access Distribution and for Core IP Routing.

Involved in L2/L3 Switching Technology Administration including creating and managing VLANs, Port security, Trunking, STP, Inter-Vlan routing, LAN security.

Worked in Configuration and extension of VLAN from one network segment to other segment between different vendor switches

Fine-tuned OSPF metrics to avoid routing loops and ensure redundancy in case of link failures.

Redistribution of routing protocols and Frame-Relay configurations

Implemented SNMP on Cisco routes to allow for network management

Implementing NAT solutions on CISCO IOS routers.

Implementation and configuration of VPN Tunnels.

Configuring VLAN trunking Protocol (VTP) on core switches.

Configured HSRP and VLAN trunking 802.1Q, VLAN routing on catalyst 6500 switches.

Maintained a Network with more than 600 Network devices, some 20,000-end hosts, and the other Network devices like DHCP, DNS Servers, and Firewall Servers.

Implementation of TCP/IP and related services – DHCP/DNS

Configured BPDU Guard, port-fast, uplink fast and other spanning tree features.

Study single point failures & design WAN structure in such a way that there are no failures in network in case of any device or link failure

Cisco IPT Migration Projects from legacy PBXs with Nortel.

Setting up VLANS and configuring ISL trunk on Fast-Ethernet channel between switches

Implementing, Monitoring, Troubleshooting and Convergence in Frame-Mode MPLS inside the core.

Load Balancing using F5 Networks Big IP

Setup simplified and traditional VPN communities and CISCO Anyconnect

Installed and configured Routers, Bridges, Terminal Servers to support WAN links

Work with application developers and systems engineer to migrate applications and systems to a new Border Gateway network.

Installed and configured CISCO ASA and Checkpoint firewall.

Involved smart view tracker to check the firewall traffic.

Documented all the work done by using MOPS, Visio, Excel and MS word.

Client: Caterpiller, Nashville, TN Oct 2013- Oct2014

Network Engineer

Responsibilities:

Managing entire LAN and WAN and troubleshooting of the company network.

Involved in the Team of Data Center Operations to perform duties like administration and deployment of Cisco Routers and Switches according to the organization requirements.

Performed network administration tasks such as creation and management of VLANS, Port security, Inter-VLAN routing, and LAN security.

Worked with ASA Firewall configuration and participated in Migration of PIX to ASA for hardware devices.

Configured ASA 5520 to ensure high-end security on the network with ACLs and Firewall.

Worked with Cisco Catalyst 6500, 4500, 4900 switches and Cisco 2800, 3600, 3800, 7200 & 7600 series Routers.

Involved in Network Designing, Routing, DNS, IP Subnetting, TCP/IP protocol.

Worked extensively on network testing and troubleshooting.

Designed network plan of routing policies with route maps, distribution lists, access-lists.

Used DHCP to automatically assign reusable IP addresses to DHCP clients.

Performed Switching Technology Administration including creating and managing VLANs, port security, trunking, RSTP, Inter VLAN routing, LAN security etc.

Designed, implemented and provided operational support for routing/switching protocols in complex environments including BGP, OSPF, EIGRP, Spanning Tree, 802.1q, etc.

Configured PVSTP+ for loop prevention and VTP for Inter-VLAN Routing.

Worked on commissioning and decommissioning of the MPLS circuits for various field offices & POPs.

GRE tunneling & Site-to Site VPN configuration between other two sites in USA.

Implemented redundancy for Routers, Switches and Firewalls.

Manage Cisco Routers and troubleshoot layer1, layer2 and layer3 technologies for customer escalations.

Four Step Solutions, Chennai, India Sep2012- Sep2013

Jr. Network Administrator

Responsibilities:

Created and maintained documentation relating to network configurations, network diagrams, LAN hardware and version records.

Maintained network security standards and provided technical support to computer system users on reported issues and service requests.

Assisted in providing network and remote connectivity hardware/software support; maintained LAN user documentation including hardware/software applications.

Experience with Microsoft Active Directory.

Troubleshoot and generating Cisco routing protocols and Switch configurations.

Provided support to Windows Sever 2003-2012R2, XP 7,8 client machines.

Assisted in providing network and remote connectivity hardware/software support; maintained LAN user documentation including hardware/software applications.

Provided backup to networking system and maintained data regarding technical problems.

Provided Support for DNS/DHCP/WINS services.

Configured the Microsoft Virtual Server and Virtual PC for testing and development

Day to day Backup of file server with windows backup tool.

Provided Hardware support, troubleshooting and diagnosis.

WinfoTech, Chennai, India Aug2010- Aug2012

System Engineer

Responsibilities:

•Extensive experience with Microsoft Windows 2012/2016 Server including Active Directory (AD), Exchange server, Group policy.

•Worked 24 7 on-call support on a rotation basis, Experienced in Office 365, Microsoft Azure and ITIL.

•Physical setting up of computers and software system installation for various computer applications and programs.

•Networking and connecting computers within the same organization to enhance communication.

•Maintained other computer peripheral devices such as printers and solving printing problems if they arise.

•Provided computer support services both for software and hardware for an organization’s employees.

•Coordinated computer maintenance with other Information Technology professionals such as Network Operations.

•Administered and maintained Microsoft Exchange Server and mailboxes.

•Provided end user application software and operating system software support.

•Created the user accounts and profiles, assign permissions using Active Directory.

•Administered the Group Policy, to upgrade and repair software installations.

•Respond to and address any tickets/ work requests in the Remedy Queue.

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