Hi
I was doing lab on RS5 Layer 2 EtherChannel with PAgP and in the workbook it says configure the po12,13,14 with switchport trunk encapsulation dot1q and switchport mode dynamic desirable and other side as mode auto. I am suspecting something is wrong because when use pagp why we need to use dot1q. This scenario dosn't work with do1q enabled bot works fine without dot1q. Here is the sample, I might be wrong
Po13 with dot1q enabled for pagp
Mar 1 05:35:40.074: %EC-5-CANNOT_BUNDLE2: Fa0/20 is not compatible with Po13 and will be suspended (trunk encap of Fa0/20 is auto, Po13 is dot1q)
po12 works fine after doing no dot1q
sw1#sh eth summ
Flags: D - down P - bundled in port-channel
I - stand-alone s - suspended
H - Hot-standby (LACP only)
R - Layer3 S - Layer2
U - in use f - failed to allocate aggregator
M - not in use, minimum links not met
u - unsuitable for bundling
w - waiting to be aggregated
d - default port
Number of channel-groups in use: 3
Number of aggregators: 3
Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
12 Po12(SU) PAgP Fa0/23(P) Fa0/24(P)
13 Po13(SD) PAgP Fa0/19(s) Fa0/20(s)
14 Po14(SD) PAgP Fa0/21(s) Fa0/22(s)
Thanks
Dwarak