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Campus Network Core Switch Configuration Table

Campus Network Core Switch Configuration Table

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A core switch configuration table typically includes VLANs, interface assignments, routing protocols, management IPs, and redundancy settings for campus networks.

Core Switch Configuration Table Example

ParameterDescriptionExample Configuration
HostnameSwitch identifierCORE1
Management InterfaceInterface for in-band managementMEth0/0/0 or VLANIF 1
Management IPIP address for switch management10.0.0.1/24
VLANsSegmentation of network trafficVLAN 10 (Dept A), VLAN 20 (Dept B), VLAN 100 (Uplink)
Trunk InterfacesLinks to other switchesEth-Trunk1: CORE ↔ ACC1/ACC2, LACP or static
Access InterfacesPorts connecting to end devicesGig1/0/1 → PC, Gig1/0/2 → Server
Hybrid InterfacesPorts connecting to either switch or PCGig1/0/3
Routing ProtocolsDynamic routing for inter-VLAN and external connectivityOSPF area 0, EIGRP, PIM-SM for multicast
Loopback InterfaceRouter ID and troubleshootingLoopback0: 10.0.0.1/32, OSPF area 0, PIM-SM enabled
Default RouteRoute to egress routerip route 0.0.0.0/0 10.0.0.254
DHCP ServerIP allocation for VLANsVLANIF 10 → Pool 10.0.10.0/24, VLANIF 20 → Pool 10.0.20.0/24
RedundancyHigh availability configurationHSRP on VLANs, dual core switches, graceful-restart enabled
Security FeaturesPrevent unauthorized accessDHCP snooping, IP Source Guard (IPSG), ACLs
NTP ServerTime synchronizationntp server 192.168.1.1

Key Configuration Notes

  • VLAN and Trunking: Core switches aggregate access switches using trunk links and Eth-Trunks for redundancy and load balancing .
  • Routing: Use OSPF or EIGRP for dynamic routing between VLANs and external networks. Loopback interfaces serve as router IDs and multicast sources .
  • Management: Assign a dedicated management IP on MEth or VLANIF interfaces for centralized administration .
  • Redundancy: Deploy dual core switches with HSRP or VRRP to ensure high availability. Enable graceful-restart for OSPF to maintain routing stability .
  • Security: Enable DHCP snooping and IP Source Guard on access VLANs to prevent unauthorized IP usage .
  • Multicast: Configure PIM-SM on loopback and core interfaces for multicast traffic .
  • DHCP and NAT: Core switches can provide DHCP services for VLANs and NAT/PAT for Internet access if required . This table and notes provide a vendor-neutral framework for configuring core switches in a campus network. Specific CLI commands will vary depending on the platform (Cisco, Huawei, Aruba), but the structure and parameters remain consistent across deployments.
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