EC 560

[pc_evans]

The exhibit shows both interfaces configured as dynamic auto but  status is trunking.

If both ports are dynamic auto the trunk would not come up and the command output of show interface trunk would not display any trunks.

IOU1#sh cdp ne
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
                  S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone,
                  D - Remote, C - CVTA, M - Two-port Mac Relay

Device ID        Local Intrfce    Holdtme    Capability  Platform  Port ID
IOU2            Eth 0/0          134            R S I  Linux Uni Eth 0/0

Total cdp entries displayed : 1
IOU1#sh run int e 0/0
Building configuration...

Current configuration : 29 bytes
!
interface Ethernet0/0
end

IOU1#show interface ethernet0/0 switchport | inc Administrative Mode:
Administrative Mode: dynamic auto
IOU1#sh int trunk
IOU1#

#############################################
IOU2#sho cdp ne
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
                  S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone,
                  D - Remote, C - CVTA, M - Two-port Mac Relay

Device ID        Local Intrfce    Holdtme    Capability  Platform  Port ID
IOU1            Eth 0/0          157            R S I  Linux Uni Eth 0/0

Total cdp entries displayed : 1
IOU2#sh run int e0/0
Building configuration...

Current configuration : 29 bytes
!
interface Ethernet0/0
end

IOU2#show interface ethernet0/0 switchport | inc Administrative Mode:
Administrative Mode: dynamic auto
IOU2#sh int trunk
IOU2#
IOU2#