Interconnecting core switches from different brands

Core switches from different brands can interoperate as long as they adhere to standard Ethernet protocols, but careful planning is needed for features like VLANs, Layer 3 routing, and redundancy.Compatibility and StandardsSwitches from different vendors generally follow IEEE Ethernet standards, so basic connectivity using standard ports (1Gbps, 10Gbps, etc.) works without issues . Problems typically arise only when using proprietary features or advanced functions like vendor-specific stacking, link aggregation protocols, or certain QoS implementations . For standard Layer 2 or Layer 3 switching, interoperability is usually reliable.Layer 2 vs Layer 3 ConsiderationsLayer 2 switches forward traffic based on MAC addresses. Connecting different brands at Layer 2 is straightforward, but ensure that VLAN tagging (802.1Q) is supported consistently across all switches .Layer 3 switches perform routing between VLANs. If one switch supports Layer 3 and another does not, inter-VLAN routing must be handled by the Layer 3 device, and the Layer 2 switches should be configured as access or trunk ports accordingly .Physical InterconnectionsUplinks between core switches can use copper (RJ45) or fiber (SFP/SFP+) depending on distance and bandwidth requirements .Redundancy is recommended: connect multiple links between core switches to allow failover if one link fails. Use link aggregation (LACP) if supported to combine multiple physical links into a single logical connection for higher throughput and redundancy .Cabling: Standard straight-through Ethernet cables are sufficient for most connections; crossover cables are rarely needed with modern auto-MDI/MDIX ports .Configuration Best PracticesVLAN consistency: Ensure VLAN IDs and trunk configurations match across all switches to prevent traffic loss or loops .Spanning Tree Protocol (STP): Enable STP to prevent loops in redundant topologies. Verify that all switches support compatible STP versions (RSTP or MSTP) to avoid convergence issues .QoS and security: If using advanced features like QoS, ACLs, or port security, confirm that all switches support the same standards or adjust configurations to avoid conflicts .Vendor-Specific NotesSome vendors offer proprietary stacking or management features that cannot be mixed with other brands. Avoid relying on these features if you plan to interconnect different brands .For enterprise-grade networks, using managed switches is recommended to maintain control over VLANs, routing, and redundancy .SummaryYou can successfully interconnect core switches from different brands by adhering to standard Ethernet protocols, carefully planning VLANs, STP, and uplinks, and avoiding proprietary features that are not cross-compatible. Redundant links and proper Layer 2/Layer 3 configuration ensure reliability and performance across a mixed-vendor network .

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Pretty much a over simplified answer is they will work fine together because all switches follow certain standards for data transmission. That said of course you are going to have issue if you...

Interconnecting core switches from different brands