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I notice that on a switch connecting to a Cisco ASA 5510 has a port that set to 100 Duplex, unlike the other ports they have 1000 Duplex. The only difference in configs I see is spanning-tree portfast is configured on it.<br />
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My question is, does spanning-tree portfast limit auto-negotiation to 100 for some reason?
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I notice that on a switch connecting to a Cisco ASA 5510 has a port that set to 100 Duplex, unlike the other ports they have 1000 Duplex. The only difference in configs I see is spanning-tree portfast is configured on it.

My question is, does spanning-tree portfast limit auto-negotiation to 100 for some reason?

Spanning-tree portfast: Does it effect Duplex?

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.

Switches / Hubs

Network Management involves issues that are independent of specific hardware or software, including email policies, upgrade planning, backup scheduling and working with managed service providers for Desktop-As-A-Service (DaaS), Software-As-A-Service (SaaS) and the like through the use of tools, coupled with manufacturer standards, best practice guidelines, policies and procedures plus all other relevant documentation. Network management also includes monitoring, alerting and reporting, management reporting, planning for device or service updates, the backup of configurations, the setting of key performance indicators and measures (KPIs/KPMs), associated service level agreements and problem records as part of the IT Service Management (ITSM) framework.

Network Management

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.