Senior Network Engineer

Revathi Bollikonda

Senior Network Engineer

Email id: ********************@*****.***

Ph No: 314-***-****

Professional Summary:

CCNA Certified Network Engineer with 8+ years of experience in Cisco Networking, Security which includes designing, Deployment and providing network support, installation, and analysis for a broad range of LAN / WAN protocols. Experience with SD-WAN solutions that include Viptella and Versa.

Hands On experience Cisco IOS/IOS-XR/NX-OS, Juniper JUNOS for configuration & troubleshooting of routing protocols: MP-BGP, OSPF, EIGRP, RIP, BGP v4.

In-depth knowledge and hands-on experience in Tier II ISP Routing Policies, Network Architecture, IP Subnetting, VLSM, TCP/IP, NAT, DHCP, DNS, FT1 / T1 / FT3 / T3 SONET POS OCX / GigE circuits, Firewalls.

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

Configuring Virtual Chassis for Juniper switches EX-4200, Firewalls SRX-210

Strong knowledge of TACACS+, RADIUS implementation in Access Control Network.

Experience with cisco ACI and Arista Cloud Vision on a POC. Knowledge on Spine leaf Architecture in Datacenter. Worked on EVPN, VXLAN, VTEPS, Bridge Domains, MP-BGP etc.

Strong route/switch and firewall background that is moving more towards Cloud Engineering using AWS and Terraform/Kubernetes orchestration and automation.

Extensive work experience with Cisco Routers, Cisco Switches, Load Balancers and Firewalls.

Experience working with Cisco Nexus 2148 Fabric Extender and Nexus 9K, 7010, 5000 series to provide a Flexible Access Solution for a datacenter access architecture.

Experience in working with Cisco Nexus Switches and Virtual Port Channel configuration.

Implemented and maintained Sourcefire intrusion detection/ prevention (IDS/IPS) system and hardened protection standards, IDS/IPS signatures on Firewall for Fine-tuning of TCP and UDP services.

Implemented traffic filters using standard and extended access lists, distribution-lists, and route maps.

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.

Proficiency in Cisco ASAs, ISRs, Catalyst/Nexus, HP Switches, Cisco Meraki, Aruba, EIGRP, OSPF, BGP.

Deployed, Managed, monitored, and supported Bluecoat Proxy for content filtering, internet access between sites and VPN client users, forward proxy scenario and reverse proxy scenario for security and worked on adding URLs in Bluecoat Proxy SGs for URL filtering.

Worked extensively in Configuring, Monitoring and Troubleshooting Cisco's ASA 5500/PIX security appliance, Failover DMZ zoning & configuring VLANs/routing/NAT with the firewalls as per the design.

Worked extensively on Cisco ASA 5500(5510/5540) Series. Experience with Palo Alto 5K series. Migration from ASA to PA.

Worked on Cisco Firewalls Cisco ASA 5500(5510/5540) Series and Checkpoint R75, 76, NGX R70 Firewalls.

In-Depth Knowledge and experience of various wireless 802.11 standards, controllers, Access Points, Wi-Fi analytics from various vendors (Cisco Meraki, HPE /Aruba, D-Link and Netgear), SD-WAN (MX 65, MX100, MX400). Experience with Viptella SD WAN solution.

Provided support that included resolving day-to-day operational issues with tickets generated by a server.

Education:

Bachelors in Computer Science, Osmania, University.

CERTIFICATIONS:

(CCNA) – Cisco Certified Network Associate.

Technical Skills:

Networking Technologies

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

Networking Hardware

Cisco Switches, Cisco Routers, ASA/Pix firewalls, 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, Wireshark, HR ping

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

Load Balancers

Cisco CSM, F5 Networks (BIG-IP)

Capacity & performance

Cisco works

Switches

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

Programming Languages

C, C++, Perl, Power Shell, Python

Simulation Tools

GNS3, VMware, OPNET IT GURU, OPNET Modeler, Cadence

Firewalls

Juniper Net Screen (500/5200), Juniper SRX (650/3600), Pix (525/535), ASA (5520/5550/5580), McAfee Web Gateway, Checkpoint, Palo Alto firewalls.

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:

Client: Crescent Energy, Huston, TX FEB 2025 - Till Date

Senior Network Engineer

Responsibilities:

Worked on SolarWinds NPM, NCM, IPAM, Windows DHCP and DNS. Infoblox as DHCP and DNS server.

Working experience on the Arista 7150S series, 7160 series, and 7260QX series switches; 7508R routers.

Experience working with Nexus 7010, 5548, 5596, 2148, 2248 devices.

Deploying and decommissioning of VLANs on core ASR 9K, Nexus 9K, 7K, 5K and its downstream devices and configure 2k, 3k, 7k series Routers.

Created documents for various platforms including Nexus 7k, ASR9k, and ASR1k enabling successful deployment of new devices on the network.

Configured Nexus 2000 Fabric Extender (FEX) which acts as a remote line card (module) for the Nexus 5000 to connect servers and storage devices.

Managing and configuring Aruba Wireless devices and Cisco Access Points

Configuring and managing F5 ASM (Application security manager). Developed security policies.

Configure and troubleshoot Juniper EX series switches.

Integrating Configuring Cisco Wireless LAN Controllers WLC with ISE to perform Dot1x.

Configured and performed software upgrades on Cisco Wireless LAN Controllers 5508 for Wireless Network Access Control integration with Cisco ISE.

Performing network monitoring, providing analysis and network topologies using various tools like NS3, Wireshark, SolarWinds etc.

Redundancy &Management HSRP, VRRP, Wireshark, SolarWinds, SNMP, Cisco Works, GNS3, Riverbed.

Performed WLAN validation of newly installed APs using NetScout Survey Pro analytical software.

Hands on Experience working with security issue like applying ACL's, configuring NAT and VPN

Responsible for design and implementation/migration from Cisco wireless platform to Aruba wireless platform.

Installation and Configuration of Cisco Catalyst switches 6500, 3750 & 3550 series and configured routing protocol OSPF, EIGRP, BGP

Worked with different models of Cisco/Juniper/Arista switches, routers, firewalls, load balancers, VPNs.

Install, manage, and monitored Palo Alto Firewalls in Panorama.

Manage various Security platforms; Juniper, Cisco ASA, Next-Gen, Check Point, Microsoft Azure, AWS Cloud and Fortinet Firewalls

Blue Coat and IronPort proxy Content management, Citrix NetScaler Load Balancing

Implement changes on switches, routers, load balancers (F5 and CSS), wireless devices per engineer’s instructions and troubleshooting any related issues.

Configured & Implemented Cisco Firepower Services with Cisco ASA 5500-X advanced security defenses.

Switching tasks include VTP, ISL/ 802.1q, IP Sec and GRE Tunneling, VLANs, Ether Channel, Trucking, Port Security, STP and RSTP.

Convert Branch WAN links from TDM circuits to MPLS and convert encryption from IP Sec/GRE to Get VPN.

Worked with Palo Alto firewalls PA250, PA4050, PA3020 using Panorama servers, performing changes to monitor/block/allow the traffic on the firewall. Technical assistance for LAN/WAN management and complex customer issues.

Responsible for layer 2 security which was implemented using a dedicated VLAN ID for all trunk ports, setting the user ports to non-trucking, deployed port security, when possible, for user ports.

Strong hands-on experience on ASA Firewalls, Palo Alto Firewalls. Implemented Security Policies using ACL, Firewall, IPSEC, SSL VPN, IPS/IDS, AAA (TACACS+ & RADIUS).

Implemented Zone Based Firewalls and Security Rules on the Palo Alto Firewall. Exposure to wildfire is a feature of Palo Alto. Supported Blue Coat Proxy in explicit mode for users trying to access Internet from Corp Network.

Palo Alto design and installation (Application and URL filtering, Threat Prevention, Data Filtering). Configured and maintained IPSEC and SSL VPNs on Palo Alto Firewalls.

Environment: Juniper, Palo Alto, Juniper EX series switches, Cisco Firepower, Bluecoat, Aruba, Nexus 9k, 7k, 5k, ASR 9k, ASR 1k, Nexus 2000 FEX, Juniper SRX, Routing Protocols: BGP, OSPF, AAA (TACACS+ & RADIUS).

Client: Digit 7, Richardson, TX NOV 2023 – JAN 2025

Senior Network Engineer

Responsibilities:

Worked on juniper MX240/MX480/PTX devices to configure and troubleshoot.

Planned, managed, and reserved ports as per the capacity requirements to establish circuit interconnections.

Worked on troubleshooting connectivity and BGP including route redistribution, distribution lists, route-maps, offset-lists, prefix lists.

Rack/stack/patch network cables, Blade Servers, Cisco Routers, Switches, in the large Data Center environment.

Installed Palo Alto PA-3060 firewalls to protects Data Center and provided L3 support for routers/ switches/ firewalls.

Troubleshooting Linux network, security-related issues, capturing packets using tools such as IP Tables, firewall.

Provide design and SDN/NFV networking support using Cisco ACI, Cisco wireless controllers, Open-Stack, Juniper Contrail and Big Switch Networks LABs and using Apple Configurator.

Excessive work experience in configuring and troubleshooting LAN Routing Protocols (HSRP, VRRP, GLBP, Layer 2 Protocols) along with Cisco ISE configurations.

Proficient with the design, installation, configuration, troubleshooting and monitoring of core routing and switching, LAN/WAN/MAN services.

Demonstrated proficiency in network administration in large datacenter environment – DNS/DHCP, Load Balancing (F5 Networks, AWS ELB).

Provided redundancy to the network, implemented hot standby routing protocol (HSRP) and Load sharing for effective utilization of routers.

Managed the rollout of MPLS-TE protocol to control bandwidth usage for guaranteed delivery and reroute of voice and video traffic across the coast-to-coast network backbone.

Managed Configuration, Logging and Reporting of Palo Alto firewall through the Panorama.

Supported Infoblox appliances grid environment for DNS, DHCP and IP Address Management tools (IPv4).

Experience with Next Generation and web application firewalls (Checkpoint, Palo Alto, Cisco ASA Firepower.

Configured, troubleshot, and upgraded Checkpoint firewalls for clients.

Upgrade IOS and configure routers and switches according to documentation.

Implemented routing protocols (OSPF, BGP), switching (VLANS, VTP Domains, STP, and Trunking), security on devices hardening (authentication, authorization, and accounting).

Configuring, managing, implementing and troubleshoot AWS Networking Infrastructure.

Worked on deployment and troubleshooting transit centers globally.

Maintained Cisco ASA firewall/Routing/NAT translations.

Provide design and SDN/NFV networking support using Open-Stack, Juniper Contrail and Big Switch Networks.

Configured and maintained setup of Wireless VLANs using Cisco Routers and Multilayer Switches while support of STP, RSTP, RPVST along with VLAN and troubleshooting of inter VLAN utilizing 802.1q

Configured BGP / LACP on Edge devices to establish connections with PNI/TRANSIT/IX Customers.

Responsible for turning up new BGP peering and customer sessions, as well as debugging BGP routing problems.

Worked on post maintenance activities including troubleshooting and configuring during data center migration.

Carried out network performance monitoring traffic analysis. Planning, troubleshooting and end-user support.

Environment: BGP, Juniper EX, MX, PTX, Port Channel, Python, TCL, LACP. F5 Load balancing (LTM, GTM, APM, AFM, ASM), EIGRP, RIP, OSPF, Voice Gateways, BGP, VPN, MPLS, Ether Channels, Cisco Catalyst Switches, Firewalls (Cisco ASA, Palo Alto).

Client: Wells Fargo, India NOV 2019 – DEC 2022

Network Engineer

Responsibilities:

Experience with configuring FEX using Cisco Nexus 5K and 2K in access layer. Configured Nexus 2000 Fabric Extender (FEX) which acts as a remote line card (module) for the Nexus 5000 to connect servers and storage devices.

Configuration and Administration of Cisco and Juniper Routers, Switches and mixed vendor Firewalls.

Experience configuring VPC (Virtual Port Channel), VDC (Virtual Device Context) in Nexus 7010/7018, Nexus 5K and Nexus 9300, 9500 series.

Possess good experience in configuring and troubleshooting WAN technologies like MPLS, T1, T3, DS3 and ISDN.

Worked on implementing lab for SDN using Cumulus Linux for test-driving part of DC migration to SDN.

Created documents for various platforms including Nexus 7k, ASR9k, and ASR1k enabling successful deployment of new devices on the network.

Hands-on expertise with Ether Channel, Spanning Tree, Trucking, ACLs, Syslog. Expertise with the setup of HSRP, Access-Lists, and RIP, EIGRP, and tunnel installations.

Experience with convert Checkpoint VPN rules over to the Cisco ASA solution. Migration with both Checkpoint and Cisco ASA VPN experience

Responsible for the IPAM (IP Address management) system for a very large WAN/LAN network (QIP) using SolarWinds IPAM and Infoblox DNS and DHCP servers. Experience with DHCP scopes, IP reservations, DNS host entries, pointers, delegations, Zones, DNS Sec etc.

Design and Implementation Cisco/Meraki Enterprise Wireless solutions for corporate infrastructures

Migrated to Juniper EX series switches from Cisco 3500 series and 6500 series switches

Configured F5 LTM, series 5000 series for corporate applications and high availability. Implemented LTM and GTM in DMZ and Internal network.

Worked on Cisco ACI, provisioning Leaf’s and Spine switches using Nexus 9K, Configuration through APIC. Expert with Tenants, VRF, Bridge Domains, subnets, APP Profiles, EPG, Contracts, Access group policies on cisco ACI for various segmentation purposes.

Expertise in installing, configuring, and troubleshooting of Cisco Routers (3800, 3600, 2800, 2600, 1800, 1700, 800, ASR 9k), Arista and Juniper Routers (E, J, M, and T-series).

Installed, configured Cisco Meraki equipment and web-based monitoring platform for MR32 wireless access points.

Strong hands-on experience on, ASA Firewalls, Palo Alto Firewalls. Implemented Security Policies using ACL, Firewall, IPSEC, SSL VPN, IPS/IDS, AAA (TACACS+ & RADIUS).

Configure VRRP & GLBP and VLAN Trunking 802.1Q & ISL, STP, Port Security on Catalyst 9300,9400 switches.

Worked with Palo Alto firewalls PA250, PA4050, PA3020 using Panorama servers, performing changes to monitor/block/allow the traffic on the firewall. Technical assistance for LAN/WAN management and complex customer issues. Deployment of Panorama and upgrade PAN-OS.

Firewall policy configuration on Checkpoint, ASA and Palo Alto Firewalls. Site to site VPN configuration checkpoint firewall ASA and Palo alto Firewalls.

Worked on Palo Alto design and installation of Application and URL filtering, thereat prevention, Data Filtering

Upgrading the code from Pan OS 7.1.X to 8.0.X. Experience working on Panorama M100.

Environment: Cisco ASA Firewalls, F5 ADC, Cisco 3900,4300,4400,4500 Routers, Cisco Catalyst switches 6500, 3750, 3550, 2960,4500,6500,6800,9300,9400 Switches, Juniper SSG-140, Palo Alto Wildfire, Juniper EX series switches, Nexus 9k, 7k, 5k, ASR 9k, ASR 1k, Nexus 2000 FEX, Juniper SRX, Routing Protocols: BGP, OSPF, AAA (TACACS+ & RADIUS).

Client: Source One, INDIA JUL 2017 - Oct 2019

Network Engineer

Responsibilities:

Responsible for implementing, engineering, & level 2 support of existing network technologies / services & integration of new network technologies / services

Key contributions include troubleshooting of complex LAN /WAN infrastructure that includes routing protocols EIGRP.

Responsible for turning up new BGP peering and customer sessions, as well as debugging BGP routing problems.

Assessed fiber optic and circuit board functionality and reported accordingly to management on a regular basis.

Worked on troubleshooting LAN and general IP operations.

Configured and managed Cisco access layer routers and switches.

Experience in deploying and configuring Cisco 3800 switches.

Support Network Technicians as they require training & support for problem resolution including performing diagnostics, & configuring network devices

Experience in configuring and implementing Remote Access Solution: IPsec VPN, SSL VPN.

Served as primary NOC technical contact to investigate and resolve post-cutover Data Network trouble tickets, both hardware and software related.

Maintenance and troubleshooting of connectivity problems using Ping, Trace route.

Configured STP for loop prevention and VTP for Inter-VLAN Routing.

Technical assistance for LAN/WAN management and complex customer issues.

Provided support for troubleshooting and resolving Customer reported issues.

Environment: Switching, Routing, Nexus, Subnetting, STP, RSTP, VTP, HSRP, Port-Channel, EIGRP, RIP, HDLC, DNS, DHCP.

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