I have a switch 2950 switch providing connectivity to remote site users through a connection to router. No trunking configured and being a stand-alone switch no VTP configured on switch therefore by default it configured as server with ver. 2. But, when I connect a sniffer to span traffic on uplink port that is the link between router 2621 and switch. I'm start receiving the packet with 802.1Q encapsulation that causes me to open each packet.
I'm wondering why in first place it encapsulation packet with 802.1Q.
How is the uplink port configured, as well as the span port configured?
What may be happening is it may be trying to autoneg. trunking if there isn't a 'switchport mode access' command on these interfaces to define them as access ports only. The 2621 doesn't have any dot1q subinterfaces that the packets could be coming from? Perhaps the sniffer is displaying the traffic wrong - I've seen that before.
We are pleased to announce availability of Beta software for 16.6.3.
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