I am trying to create an etherchannel between a Cisco 2950 and 3550 in a lab first. I want to use 2 ports on each switch as a trunk for load balance and redundancy.
If I just have one fa0/1 from each switch connected the PC's in fa 0/24 on each switch (VLAN 10) can ping each other as soon as I add the second trunk from fa0/2 on each switch the pings stop and I get the spanning tree blocking one of the ports:
01:11:14: %SPANTREE-7-RECV_1Q_NON_TRUNK: Received 802.1Q BPDU on non trunk FastE thernet0/3 VLAN1.
01:11:14: %SPANTREE-7-BLOCK_PORT_TYPE: Blocking FastEthernet0/3 on VLAN0001. Inconsistent port type.
Please take a look at my simple configs