Sekhar

Sr Network Engineer

Email: acytlz@r.postjobfree.com

Contact:908-***-****

Professional Summary

Cisco Certified Network Engineer with 8 years of experience in the industry, which includes expertise in the areas of Routing, Switching and Firewall.

Strong hands on experience in installing, troubleshooting, configuring of Cisco ASR, 7200, 3900, 3800, 2900, 2800, and 1800 series Routers, Cisco Catalyst 6500, 4500, 3750, 2950 and 3500XL series switches.

Hands on experience working with Cisco, Nexus 7K, 5K & 2K Switches.

Expert level knowledge of troubleshooting, implementing, optimizing and testing of static and dynamic routing protocols such as EIGRP, OSPF, BGP ability to interpret and resolve complex route table problems.

Implementation traffic filters on Cisco routes using Standard, extended Access list.

Expert Level Knowledge about TCP/IP and OSI models.

In-depth expertise in the analysis, implementation, troubleshooting & documentation of LAN/WAN architecture and good experience on IP services.

Extensive Knowledge on the implementation of Cisco ASA 5500 series and checkpoint R 75 firewalls.

Cisco ASA Firewall troubleshooting and policy change requests for new IP segments.

Worked on NXOS, IOS, and IOS-XR and N7K-NXOS.

Experience in F5, Cisco ACE 4710 Load balancers.

Experience in working with load balancer for converting CSS to ACE

Experience deploying BIG-IP F5LTM Load Balancers for load balancing and traffic management of business application.

In-depth knowledge and hands-on experience on IP Addressing, Sub netting, VLSM and ARP, reverse & proxy ARP, Ping Concepts.

Experience in working with video from end-point in the network to the backend.

Knowledge of implementing and troubleshooting complex layer 2 technologies such as VLAN Trunks, VTP Ether channel, STP, RSTP and MST.

Experience with Layer 2 and Layer 3 protocols like LDP, RSVP/ TE, QOS, COS L2 VPWS and VPLS, FRR.

Experience in configuring HSRP and redistribution between routing protocols troubleshooting them.

Experience on Virtual Private Network (VPN) for operating Network and Data Center.

Experience with Internet/Intranet Networking Protocols and Services

Implementation of HSRP, VRRP and GLBP for Default Gateway Redundancy.

3 years of experience in working with operating systems like Linux, Unix and Ubuntu

Experience in working with Windows power shell scripting to maintain and administrating server environments.

Excellent qualities such as Teamwork, Negotiation, Analysis and Communication.

Technical Skills:

Networking Technologies

LAN/WAN Architecture, TCP/IP, Frame Relay, VPN, VLAN, VTP, NAT, PAT, STP, RSTP, PVST, MSTP

Networking Hardware

Cisco Switches, Cisco Routers, ASA/Pix firewalls, VMware, Ironport

Routing Protocols

OSPF, IGRP, EIGRP, RIP, MPLS, IS-IS, BGP, Multicasting

Security Technologies

PAP, CHAP, Cisco PIX, Blue Coat

Network Monitoring

Cisco Works 2000, Wire Shark, HRPing, SolarWinds

Operating Systems

Windows 7, Vista, XP, 2000, LINUX, Cisco IOS, IOS XR

Routers

CISCO 2600, 2800,3600,3800,7200, Juniper M & T Series, Cisco CRS-1, CRS -3, GSR

Switches

CISCO 2900, 3500,4500,5000,6500, Nexus 7k,5k,2k

Simulation Tools

Qualnet Developer, OPNET IT GURU, OPNET Modeler, Cadence

Firewalls

Juniper net screen (500/5200), Juniper SRX (650/3600), Pix (525/535), ASA (5520/5550/5580), Checkpoint, Palo Alto, McAfee Web Gateway

AAA Architecture

TACACS+, RADIUS, Cisco ACS

Features & Services

IOS and Features, HSRP, GLBP, IPAM IRDP, NAT, SNMP, SYSLOG, NTP, DHCP, CDP, DNS, TFTP and FTP Management, Open Stack, IVR’s, HLD and LLD documents, Dell equal logics

Professional Experience:

Facebook, Palo Alto, CA Nov 14 - Present

Sr. Network engineer

Responsibilities:

Involved in complete LAN, WAN development (including IP address planning, designing, installation, configuration, testing, maintenance etc.).

Experience in deployment of Nexus 7010, 5548, 2148T, 2248 devices

Experience working with Cisco Nexus 2148 Fabric Extender and Nexus 5000 series to provide a Flexible Access Solution for datacenter access architecture.

Installation and maintenance of Cisco Layer 3 switches 3750, 4500X, 6500 in multi VLAN environment.

Maintenance and configuration of Cisco ASR1000 series and 7200VXR routers at data center and deployment of 3900, 3800, 2951 and 2821 for branch connectivity.

Working on Cisco 6509 and 4507 series switches for LAN requirements

Involved in migration from Site-to-site GRE tunnels network to MPLS-based VPN for customer’s WAN infrastructure.

Involved in Switching Technology Administration including creating and managing VLANS’s, Port security, Trunking, STP, Inter VLAN routing, LAN security etc.

Configured BGP, EIGRP and OSPF and Policy based Routing.

Configuring OSPF and Static routing on Juniper M and MX series Routers

Provide Tier II Load Balancer expertise on F5 BigIP Local Traffic Managers (LTM). Designing F5 solutions/support for migration work of applications and websites from Cisco CSS Load Balancers to the F5 BigIP Load Balancers.

Responsible for Checkpoint firewall management and operations across our global networks.

Working with Checkpoint Support for resolving escalated issues.

Configuring VLAN, spanning tree, VSTP, SNMP on EX series switches.

Managed the F5 BigIP GTM/LTM appliances to include writing iRules, SSL offload and everyday task of creating WIP and VIPs.

Coordinating with service providers for WAN link outages.

Upgraded and updated Cisco IOS from 12.3T to 12.4.

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

Used ASA Firewall and ACLs for authentication of EIGRP to ensure high security on the network.

Configured Cisco 7200 routers which were also connected to Cisco ASA 5508 security appliances providing perimeter based firewall security.

Configuring ASA 5510 Firewall and accept/reject rules for network traffic.

Used load balancers ACE and load balancing technique with multiple components for efficient performance and to increase reliability through redundancy.

Used Network monitoring tools to ensure network connectivity and Protocol analysis tools to assess and pinpoint networking issues causing service disruption.

Optimized performance of the WAN network consisting of Cisco 3550/4500/6500 switches by configuring VLANs.

Extensive knowledge and troubleshooting in data communication protocols and standards including TCP/IP, UDP, IEEE 802.3, Token Ring, Cable Modem, PPPOE, ADSL, Multilayer Switching, DoD standards.

Once trouble ticket has been created keep customer informed of status of ticket and estimated time to repair.

Other responsibilities included documentation and supporting other teams.

Environment: Cisco 3750/3550/3500/2960 switches and Cisco3640/12000/7200/3845/3600/2800 routers, F5 LTM, Checkpoint, OSPF, BGP, VLAN, HSRP, LAN, WAN, IPV4, ASA Firewall, Nexus 7K/5K/2K

T-Mobile, Bellevue, WA Oct 13 – Aug 14

Sr. Network Engineer

Responsibilities:

Working with Network Design and implementation teams on various projects across related to Brach, Campus and Data Center.

Implemented and maintained various WAN equipment such as Cisco 2800, 3800 and 7200 routers, ASR 1006.

Experience working with Cisco 3750, 4948, 2811, 2600, 7200, 6500, series switches

Designing and deployment of Partner IPSEC VPN tunnels.

Involved in the configuration & troubleshooting of routing protocols: MP-BGP, OSPF, LDP, EIGRP, RIP, BGP v4. Configured IP access filter policies.

Deploying and decommissioning Cisco switches and their respective software upgrades.

Experience with manipulating various BGP attributes such as Local Preference, MED, Extended Communities, Route-Reflector clusters, Route-maps and route policy implementation.

Deploying and commission of core ASR 1K, Nexus 7K, 5K and its downstream devices.

Experience configuring Virtual Device Context in Nexus 7010

Experience with converting Cisco 6500 IOS to Cisco Nexus NX-OS in the data center environment.

Experience configuring VPC, VDC and ISSU Software upgrades on Cisco Nexus 7010.

Experience in Configuring, upgrading and verifying the NX-OS operation system.

Performed OSPF, BGP, DHCP Profile, HSRP, IPV6, Bundle Ethernet implementation on ASR 9K redundant pair.

Performing the ACL requests change for various clients by collecting source and destination information from them.

Performed Break Fix support through driving to different buildings, identifying the root cause of the hardware issues with switches, routers.

Design, implementation and operational support of routing/switching protocols in complex environments including BGP, OSPF, EIGRP, Spanning Tree, 802.1q, etc.

Performing troubleshooting on slow network connectivity issues, routing issues that involves OSPF, BGP and identifying the root cause of the issues.

Managed the F5 BigIP GTM/LTM appliances to include writing iRules, SSL offload and everyday task of creating WIP and VIPs

Configuring various advanced features (Profiles, monitors, Redundancy, SSL Termination, Persistence, SNATs, HA on F5 BIGIP appliances SSL termination and initiation, Persistence, Digital Certificates, executed various migration/upgrade projects across F5 and hands on with F5 BIGIP LTMs/EM.

Configure Corporate, Wireless and Lab Devices which includes Bandwidth Upgrade, Adding New Devices, Decom the Devices, Testing (Pilot).

Implemented DHCP, DNS, IPAM configuration on the servers to allocate, resolute the ip addresses from Subnet.

Troubleshoot and Worked with Security issues related to Cisco ASA/PIX, Checkpoint, IDS/IPS and Palo Alto firewalls.

Configuring rules and maintaining Palo Alto Firewalls & Analysis of Firewall logs.

Familiar with various MSIT Tools to check Networking Connectivity, Testing, Configuration and Adding or Removal of IP address blocks, Decoming or Adding the Devices.

Point-to-Point Tunneling Protocol (PPTP), Layer Two Tunneling Protocol (L2TP), Internet Protocol Security (IPsec)

Troubleshoot the Network Issues onsite and remotely depending on the severity of the issues.

Created Visio Dean / Visio Documentation to give complete picture of network design for each building.

Environment: Nexus 7K/5K/2K, Cisco 3750/3550/3500/2960 switches, F5 BIGIP, Cisco ASA5510, Checkpoint, OSPF, BGP, VLAN, HSRP, LAN, WAN, IPV4.

Infinity Insurance, Birmingham, AL Jan 12 – Sep 13

Sr. Network Engineer

Responsibilities:

Worked as part of a team to manage Enterprise Network Infrastructure as a Tier 3 Support Engineer.

Involved in configuring and implementing of Composite Network models consists of Cisco 7600, 7200, 3800 series routers and Cisco 2950, 3500, 5000, 6500 Series switches.

Conversions to BGP WAN routing. Which will be to convert WAN routing from OSPF to BGP (OSPF is used for local routing only) which involves new wan links.

Replace branch hardware with new 3900 routers and 2960 switches.

Configuring firewall switch module on Cisco 6506 distribution layer switches, configuring VTPs, trunking, inter-vlan routing, port fast, uplink fast, backbone fast on access layer switches.

Enable STP attack mitigation (BPDU Guard, Root Guard), Using MD% authentication for VTP

Planned and installed Frame Relay WAN links to the branch offices.

Maintained and setup wireless access points at various locations in the company.

Great understanding of WLAN including 802.11 standards, Lightweight and Autonomous systems, WPA, PEAP.

Assisted in MPLS migrations, implemented a backup for the existing WAN connection using site-to-site IP sec VPN tunnels.

Knowledgeable in configuration of Voice VLAN’s (VOIP), prioritizing the voice traffic over the data traffic, Telecom, using Dark fiber created fast speed line between two campus, Wireless networks.

Worked on Amazon AWS with 3 other people as a team. Security frameworks were developed to protect and provide compliance for virtual systems, cloud computing and mobile applications solutions.

Worked on Network Traffic sizing of cloud to network through security firewalls.

Implement the firewall rules using Netscreen manager (NSM).

Monitoring the network traffic with the help of Qradar and Cisco IPS event viewer.

Remediation of firewall rules from checkpoint firewalls to Cisco ASA firewalls and their implementation.

Helped in troubleshooting in DDoS.

Configuring and troubleshooting OSPF routing protocol on the corporate network.

Tested and implemented various BGP attributes such as Local Preference, MED, AS-PATH, Community, Extended community using route-maps.

Worked on migration of Frame Relay based branches to MPLS based VPN for customer’s WAN infrastructure.

Worked on migration of existing PIX firewall to ASA firewall, PIX OS upgrade from 6.3 to 7.0, also configured on BIG IP (F5) Load balancers and monitored the Packet Flow in the load balancers.

Have good experience working with the Trouble Tickets on F5 Load Balancers.

Switch experience includes Cisco Catalyst switches: Cisco 3750, 4500, 6500 series switches.

Managing enterprise BGP setup by configuring and troubleshooting BGP related issues.

Scaling of BGP and IGRP in the core, dealt with implementation of deployment related to Cisco devices and applying security policies on it.

Troubleshoot issues related to VLAN, VLAN Trunking, HSRP failovers, related issues.

Configuration of NAT.

Maintain effective communications with vendors, peers and clients in resolution of trouble-tickets, equipment RMAs, and support requests.

Managed data back-ups, scheduled data back-up, and preparation for disaster recovery files.

Planning for upgrade of IOS on devices and performing the upgrade.

Assisted in the architecture, evaluation and recommendations related to purchasing and installing hardware, software related to IP Networking.

Environment: Cisco 3750/3550/3500/2960 switches and Cisco 3640/12000 /7200/3845/3600/2800 routers, Cisco ASA5510, Checkpoint, F5 Load Balancer Cisco Nexus7K/5K

Polaris Software Labs Ltd, Feb 10 – Dec 11

Network Operations Engineer

Responsibilities:

Experienced in Planning and Organizing Change Managements, Maintenance/updating of Network diagrams, Maintenance & Monitoring Base station infrastructure.

Commissioning of New Links By coordinating with BSO.

Ensure standard Router and Switch Configurations are maintained and also Responsible for Capacity planning, Contingency planning & disaster recovery.

LAN Segments monitoring/Troubleshooting LAN related issues and periodic backup of Router/ Switch Configurations.

Worked on Network Operations using Ticketing system using SIFY TAC.

Monitoring the NMS system for different Network Alerts.

Performed switching technology administration including VLANs, inter-VLAN routing, Trunking, STP, RSTP, Port Aggregation & link negotiation.

Network Cabling, dressing, labeling and troubleshooting various network drops onsite.

Troubleshoot of Leased Lines like STM4, DS3, E1 Links, Metro, NLD ILD Services and RF links.

Design, execution of installation and configuration of VPN/IVPN, LAN/WAN as per organizational requirements.

Analyzing the Bandwidth Utilization of the Links.

Troubleshooting on the devices by remote login to determine the RFO (Reason for outage) and RCA (Root cause analysis) to minimize the consequences of malfunctions.

Equipment Installation /Removal in the NOC.

Environment: BSO, SIFY TAC, VLANs, inter-VLAN routing, Trunking, STP, RSTP, Port Aggregation, link negotiation, STM4, DS3, E1 Links, Metro, NLD ILD Services, RF links, VPN/IVPN, LAN/WAN, RFO, RCA, NOC

Keane India Ltd Sep 08 – Jan 10

System/Network Administrator

Responsibilities:

Configured and supported TCP/IP networks.

Monitored the network with Cisco Works 2000.

Documented the design, implementation and troubleshooting procedures.

Configured and troubleshoot VLAN, VTP, STP and Trunks.

Responsible for procurement and installation of H/W, network drives and other IT infrastructure.

Network Administrator responsible for the full Planning, designing, installation and administration of the Corporate WAN (wide area network).

Worked on the datacenter environment, with routers and switches.

Configuration, Management, Troubleshooting of Network devices (Routers, Switches, Firewalls, Servers, DSL Modems etc.). Maintained the Telecommunication Connectivity using DSL and T1 Lines.

Maintained complex LAN/WAN networks with several VLANS and provided support for routing protocols.

Managed IP addressing and implemented IP Access Lists.

Evaluate and recommend inter-connectivity hardware, software, and services to fulfill various businesses needs as requirements develop.

Worked on Routers Cisco 2620, 3750 and 2950 Switches & Link sys wireless access points.

Environment: TCP/IP networks, Cisco Works 2000, VLAN, VTP, STP, Trunks H/W, network drives, DSL, T1 Lines LAN, WAN, VLANs, IP Access List, Cisco 2620, 3750, 2950 and Link sys.

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