PROFESSIONAL SUMMARY:

• A dedicated Professional with 8 years of expertise, in Implementation, Administration, Operations and Troubleshooting of enterprise data networks (LAN, WAN) as a Senior Network Engineer.
• Extensive hands on experiences on Cisco Switches, Cisco Routers, Load Balancers.
• Proficient experience in configuring Cisco Catalyst 2900,2960, 3560, 3750, 4500, 4900, 6500 series and Nexus 7010, 5548 and 2248 switches and deep understanding of hardware architecture.
• Expertise in configuring and deployment of routing protocols - OSPF, EIGRP, BGP, Policy-based routing over Cisco Routers, configuring and troubleshooting route redistribution.
• Implemented traffic filters using Standard and Extended access-lists, Distribute-Lists, Route Maps and route manipulation using Offset-list.
• Comprehensive expertise in the implementation of analysis, optimization, troubleshooting and documentation of LAN/WAN networking systems.
• Hands on experience in troubleshooting of inter-VLAN routing and VLAN Trunking using 802.1Q. Implemented gateway redundancy with HSRP and GLBP.
• Expertise in implementing Layer 2 technologies including VLAN’s, VTP, STP, RSTP, Trunking and Port-security, expertise on working with Ether channel technology (LACP, PAgP).
• Managed inventory of all network hardware, Management and Monitoring by use of SSH, Syslog, SNMP, NTP.

PROFESSIONAL EXPERIENCE:

Confidential, Mount Prospect, IL

Responsibilities:

• Refreshed and maintained LAN infrastructure for both domestic and international airport sites and involved in Data Center refresh/support projects.
• Responsible for implementing, engineering, & support of existing network technologies / services & integration of new network technologies / services.
• Configured Layer 2 protocols such as VLANs, Trunks, Port-Channels, Spanning Tree and SVIs.
• Configured RPVST on the Access Layer Switches (2950, 2960, 3750, 3550, Aruba 3810s) also on Cisco3850s, Cisco 4500s, HP 5412s as a loop prevention mechanism, configured Port-security, Private-VLANS for maintaining loop free and secure environment.
• Configured Layer 3 routing protocols such as OSPF and BGP on Cisco 3850s, Cisco 4500s, Aruba 3810s, Cisco 4331 devices.
• Involved in troubleshooting of DNS, DHCP and other IP conflict problems in local site environments and as well as issues with IPAM management system - INFOBLOX.
• Worked and provided support on the WAN structure to prevent single point of failure in case of link failure.
• Troubleshooting issues and outages on Trunks and Router interfaces and firewalls extensively.
• Technical assistance for LAN/WAN management and complex customer issues.
• Provided support for peer Network Engineers in their installations and configurations for the new site builts.
• Implemented Trunking protocols (802.1q) on 3560, 3750 and 4500series Cisco Catalyst switches.
• Provided on-call support for installation and troubleshooting of the configuration issues.
• Planned and implemented Subnetting, VLSM to conserve IP addresses.
• Configured STP for loop prevention, and configured Inter-VLAN Routing.
• Perform OS upgrades to new standard versions on Cisco 3850s, Cisco 4500s, Aruba 3810s.
• Troubleshooting OSPF neighbor states, OSPF neighbor adjacencies, stuck in states, neighbor authentication issues.
• Provided Technical support for improvement, up gradation, and expansion of the existing network architecture.
• Taken care of day to day Wired, wireless, VOIP and user operational issues and made a documentation of resolution steps to share with the internal team.
• Provided proper documentation to maintain accountability and priority of installation during the migration. Ensured proper documentation was delivered to Change Management team, Incident Management.
• Used internal network monitoring tools to ensure network connectivity and Protocol analysis tools to assess the network issues causing service disruption.
• Worked with several different teams such as Voice Engineering, Voice Operations, Network Operations, Wireless Engineering, Wireless Operations, Security Engineering to provide L3 Level network engineering support in their projects/installs.

Confidential - Farmington Hills, MI

Responsibilities:

• Performed IOS upgradation 3750s, 3850s series and on Cisco 4500 series switches.
• Performed troubleshooting of connectivity problems using PING, and Trace route.
• Configured Standard, Extended, and Named Access Lists to allow users all over the company to access different applications and blocking others.
• Maintained network documentation for the lab network infrastructure that includes both LAN & WAN and Voice for both logical and physical deployments.

Confidential - Boston, MA

Responsibilities:

• Involved in configuring MPLS circuit to make it as a backup path using BGP Backdoor, access-lists & route-maps in case of DC primary link failure for branch corporate Vertex MPLS sites.
• Administrated switching technology including creating and managing VLANS, Port security, trunking, RPVST, and Port Security on Catalyst 6500, 4500, 3500 series switches.
• Expertise in deploying and testing of BGP attributes such as AS-Path, Local Preference, MED, etc.
• Configured OSPF summarization for data center hosted networks to minimize the OSPF routing table (by reducing Type3 flooding) and to save router CPU resources.
• Actively monitored and troubleshooting of Cisco 2900, 3750, 4500, 6500 series for L2 switching, Layer 3 routing issues, hardware/power supply failure issues and Cisco 5500 wireless controllers and Aironet 3700 series wireless Access Points.
• Performed IOS upgrades on Cisco Catalyst 2900,3750,4500 series switches in scheduled maintenance windows for corporate branches.
• Actively monitored, investigated and worked with ISPs on WAN outages, MPLS link failures.
• Performed an audit of Cisco Access Points (AP 3700 series) in corporate branches and configured AP’s in Cisco Wireless LAN controller (5500 series) and also in Cisco Prime Infrastructure.
• Configured phones (Cisco 8945’s, 8845’s), User voicemails, User device profiles, remote destination profiles in Cisco Call Manager and in Cisco Unity. Configured and maintained Video conferencing units such as Tx9000, Cisco DX80 and Cisco 8831s for all corporate conference rooms.
• Taken care of day to day Wired, wireless, VOIP and FAX user operational issues and made a documentation of resolution steps to share with the internal team.
• Configured and maintained Network shared printers for all the end users in all global corporate locations.
• Troubleshooting of STP forwarding loops, excessive topology changes, and convergence related issues and securing the network against forwarding loops.

Confidential -Waltham, MA

Responsibilities:

• Pro-active Monitoring and Alerting of client’s network for any alarms.
• Taking escalations and involved in handling major incidents towards resolution.
• Configuring VLAN Trunking 802.1Q, RSTP on Catalyst 6500 switches. Expertise in creating Access control lists for layer-3 security and providing resilient network using protocols like HSRP and GLBP.
• Troubleshooting involved in issues related to DNS, DHCP and FTP.
• Working on commissioning WAN links and troubleshooting WAN outages.

Confidential - Redmond, WA

Responsibilities:

• Responsible for implementing, engineering, & support of existing network technologies / services.
• Handling network incidents of both wired & wireless infrastructure for all MSIT global branches.
• Implemented port aggregation & link negotiation using LACP and PAGP.
• Experience on configuring HSRP & STP protocols on Data center switches includes Catalyst 6509, 6504 series and Nexus 7004, 7009, 3064, 3048 switches.
• Experience in Configuration and troubleshooting of routing protocols (OSPF, BGP),
• Worked on OSPF using features like TSA, SA, NSSA and route summarization. Configured EBGP/IBGP policies also tested BGP attributes such as Local preference, MED, AS-PATH, Community and Weight.
• In depth understanding of interoperability between F5 and Cisco Networking equipment.
• Performed OS upgrades & device replacements on several cisco devices (6500, Nexus 2K, 3K, 5k and 7k series switches)
• Took the responsibility of handling all Wireless incidents such as connectivity issues, slow performance, limited connectivity, and Signal strength & interference issues. Aruba AP 200, 130, 70 series & 7000, 6000, 3600 series of mobility controllers.
• Replaced the wireless controllers & terminating access points in redundant path to avoid any outage to Wireless clients.
• Analyzing packet capture in Wireshark to drill down and to find the root cause of latency related and other strange application behaviors.

Confidential

Responsibilities:

• Configured RIP and EIGRP on 2600, 2900 and 3600series Cisco routers
• Involved in troubleshooting of DNS, DHCP and other IP conflict problems
• Implemented VTP and Trunking protocols (802.1q and ISL) on 3560, 3750 and 4500series Cisco Catalyst switches
• Provided on-call support for installation and troubleshooting of the configuration issues
• Configured Standard, Extended, and Named Access Lists to allow users all over the company to access different applications and blocking others
• Planned and implemented Subnetting, VLSM to conserve IP addresses
• Configured STP for loop prevention and VTP for Inter-VLAN Routing
• Performed troubleshooting of connectivity problems using PING, and Trace route
• Provided Technical support for improvement, up gradation, and expansion of the existing network architecture
• Done troubleshooting of TCP/IP problems and connectivity issues in multi-protocol Ethernet environment.
• IOS upgradation 1900, 2900, 3500 series Cisco Catalyst switches and 2500, 2600, 3600 series Cisco routers using TFTP