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Excellent, thanks for that. &nbsp;The vlans exist, but the trunks are not plugged in yet.<br />
<br />
THanks,
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Excellent, thanks for that.  The vlans exist, but the trunks are not plugged in yet.

THanks,

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Hi,<br />
<br />
I am setting up a production switch before I actually plug it in. &nbsp;I am configuring spanning tree priorities for the switches. &nbsp;This switch is NOT my primary root or secondary root switch. &nbsp;The cmds I typed in so far are :<br />
<br />
spanning-tree mode pvst<br />
spanning-tree extend system-id<br />
spanning-tree vlan 1,3-8,11-14,16,20,80-81,88<wbr />,96,110,12<wbr />0,124,130 priority 57344<br />
spanning-tree vlan 134,160,192,246-252,254-25<wbr />6,802 priority 57344<br />
spanning-tree portfast default<br />
<br />
But when I do a show spanning-tree, I get: No spanning tree instance exists.<br />
<br />
Could it be because I have not plugged in any trunk ports yet (gotta wait for a maintenance window), or am I missing another cmd ? &nbsp;I usually like to see some results before plugging something into production network, but if this is all I get for now, that is fine, I just want to be sure.<br />
<br />
Thanks in advance
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Hi,

I am setting up a production switch before I actually plug it in.  I am configuring spanning tree priorities for the switches.  This switch is NOT my primary root or secondary root switch.  The cmds I typed in so far are :

spanning-tree mode pvst
spanning-tree extend system-id
spanning-tree vlan 1,3-8,11-14,16,20,80-81,88,96,110,120,124,130 priority 57344
spanning-tree vlan 134,160,192,246-252,254-256,802 priority 57344
spanning-tree portfast default

But when I do a show spanning-tree, I get: No spanning tree instance exists.

Could it be because I have not plugged in any trunk ports yet (gotta wait for a maintenance window), or am I missing another cmd ?  I usually like to see some results before plugging something into production network, but if this is all I get for now, that is fine, I just want to be sure.

Thanks in advance

Do spanning-tree instances not show until trunks are plugged in ?

Network design and methodology, also known as network architecture, is the design of a communication network. It is a framework for the specification of a network's physical components and their functional organization and configuration, its operational principles and procedures, as well as data formats used in its operation. In telecommunication, the specification of a network architecture may also include a detailed description of products and services delivered via a communications network, as well as detailed rate and billing structures under which services are compensated.

Network Architecture

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 Operations includes asset management, help-desk supervision, security and user policies, infrastructure administration and anything else that affects the operation of your network. Discussions will include those of best practices in platforms, configurations, performance, security and accounting.