Configuration of Core Network Intelligent Switch

A core network intelligent switch configuration involves VLAN creation, interface setup, routing, DHCP, and security features to ensure connectivity, isolation, and high availability across the network. 1.

VLAN and Interface Configuration

Create interconnection VLANs to connect the core switch with BRAS, firewalls, and access switches.

Assign VLAN I

Ds and bind them to VLANIF interfaces for Layer 3 connectivity.

Configure VLANI

F interfaces with static IP addresses to enable routing between VLANs and external networks.

Each VLANI

F should be associated with a VPN instance if traffic isolation is required.

Enable MA

C learning on VLANs to optimize forwarding and prevent loops. 2.

Routing Configuration

Configure OSP

F or static routes on the core switch to ensure connectivity between user networks and egress routers. Set default routes pointing to the egress router for outbound traffic. Assign next-hop IP addresses for inter-VLAN and external routing.

Use VP

N instances to separate public network routes from internal or firewall return routes, enhancing security and traffic management. 3.

DHCP and IP Management

Enable DHC

P server on the core switch to dynamically assign IP addresses to users in different VLANs.

Configure DHC

P relay if the DHCP server is centralized, ensuring requests from multiple VLANs are forwarded correctly.

Enable DHC

P snooping on access switches to prevent unauthorized DHCP servers and protect IP address assignments. 4.

Security and Access Control

Enable IPS

G (IP Source Guard) on access switches to verify source IP and MAC addresses, preventing spoofing. Implement link aggregation between core and access switches to provide redundancy and high availability. Configure spanning tree protocol (STP) to prevent loops in the network topology.

5.

Management and Monitoring

Assign management VLANs separate from user VLANs for secure switch administration. Set hostnames and domain names for easier identification and network management. Use templates or automation tools (e.g., iMaster NCE-Campus) to standardize VLAN, interface, and IP configurations across multiple core switches.

6. Interconnection with Other DevicesConnect core switch to BRAS and firewalls using dedicated VLANs and interfaces, ensuring proper routing and traffic isolation. Configure egress router interfaces for public network access and internal network communication, including default routes and DNS settings. 7. High Availability and Scalability Deploy link aggregation and redundant paths to maintain network uptime. Use hierarchical network design to separate core, distribution, and access layers, allowing easier scaling and management. Monitor traffic and performance using built-in switch features or AI-driven network assurance tools for proactive issue resolution. This configuration scheme ensures secure, scalable, and manageable core network operations, supporting multiple VLANs, dynamic IP assignment, routing, and high availability while maintaining traffic isolation and network integrity.