Aliabbas Shaik

• Led first-level network incident response and troubleshooting for enterprise customers, achieving timely resolution of
connectivity issues using Ping, Traceroute, and CDP diagnostics.
• Collaborated with L2 engineers to escalate and resolve complex network faults, ensuring SLA compliance and minimal
downtime across all critical infrastructure.
• Configured and managed Cisco routers and switches, including VLAN setup, trunking, Inter-VLAN routing, Private
VLANs, and port assignments across multi-site environments.
• Deployed and maintained routing protocols (OSPF, EIGRP) and configured route redistribution between multiple
protocols to optimize traffic flow and network convergence.
• Administered network security policies by implementing and verifying ACLs for traffic identification and filtering,
configuring site-to-site and remote-access VPN connections, and enforcing access control policies.
• Configured and troubleshot Layer 2 technologies including STP, MSTP, RSTP, and EtherChannel to ensure loop-free,
high-availability switching environments.
• Managed IP addressing schemes including IPv4, IPv6, DHCP, NAT, and DNS configuration and verification on Cisco
devices.
• Maintained comprehensive documentation of network topology changes, configuration baselines, and incident
resolution procedures to support audit readiness and team knowledge sharing.
• Proactively monitored network performance and contributed to root-cause analysis, driving improvements in
infrastructure reliability and reducing recurring incidents.
• Kept current with evolving networking technologies, protocols, and industry best practices through continuous
professional development.