Recently implemented a new 2801 802.1q trunk to a 2950 switch, every 3 seconds we get a burst of around 1,000 input errors on the 2801 router, but nothing shown on the interface on the switch.
Cables between the two (twice)
swapped the ports on the 2950 switch (swapping out isn't really a simple option at present)
Can anyone suggest why we might be seeing this as it seems a very standard setup, and one that we have in many other sites without problems.
description Switch LAN
no ip address
encapsulation dot1Q 1 native
ip address 10.10.10.1 255.255.255.248
no snmp trap link-status
on the 2950:
switchport trunk allowed vlan 1,123,126,140,142,152
switchport mode trunk