Hi guys I am a newbie here. I am planning to take my CCNA exam next month. However I had encountered a problem regarding LACP.
All my configurations are well and running until I added LACP in my network or different etherchannel versions in my activity just for the sake of practicing.
Well now, if my ports are bundled together, do they still participate in STP? If not why do my switches are blocking the ports when attempting "sh span" command? Also I cannot ping my switch with the block ports in it.
Actually before experiencing this problem, it was working well with LACP configurations added in my network. The thing is my packet tracer keeps on shutting down so I had to reopen again my activity for a few times. Then after doing it, the problem occurs.
Switch8#sh span
VLAN0010
Spanning tree enabled protocol ieee
Root ID Priority 32778
Address 0001.6302.894C
Cost 9
Port 28(Port-channel 2)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32778 (priority 32768 sys-id-ext 10)
Address 00E0.B022.B556
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Po1 Altn BLK 9 128.27 Shr
Po2 Root FWD 9 128.28 Shr
VLAN0020
Spanning tree enabled protocol ieee
Root ID Priority 32788
Address 0001.6302.894C
Cost 9
Port 28(Port-channel 2)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32788 (priority 32768 sys-id-ext 20)
Address 00E0.B022.B556
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/2 Desg FWD 19 128.2 P2p
Fa0/1 Desg FWD 19 128.1 P2p
Po1 Altn BLK 9 128.27 Shr
Po2 Root FWD 9 128.28 Shr
VLAN0030
Spanning tree enabled protocol ieee
Root ID Priority 32798
Address 0001.6302.894C
Cost 9
Port 28(Port-channel 2)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32798 (priority 32768 sys-id-ext 30)
Address 00E0.B022.B556
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/3 Desg FWD 19 128.3 P2p
Fa0/4 Desg FWD 19 128.4 P2p
Po1 Altn BLK 9 128.27 Shr
Po2 Root FWD 9 128.28 Shr
Switch8#sh etherchannel summary
Flags: D - down P - 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
u - unsuitable for bundling
w - waiting to be aggregated
d - default port
Number of channel-groups in use: 2
Number of aggregators: 2
Group Port-channel Protocol Ports
------+-------------+-----------+----------------------------------------------
1 Po1(SU) LACP Fa0/6(P) Fa0/7(P)
2 Po2(SU) LACP Fa0/10(P) Fa0/11(P)
Switch8#sh etherchannel port-channel
Channel-group listing:
----------------------
Group: 1
----------
Port-channels in the group:
---------------------------
Port-channel: Po1 (Primary Aggregator)
------------
Age of the Port-channel = 00d:00h:11m:41s
Logical slot/port = 2/1 Number of ports = 2
GC = 0x00000000 HotStandBy port = null
Port state = Port-channel
Protocol = LACP
Port Security = Disabled
Ports in the Port-channel:
Index Load Port EC state No of bits
------+------+------+------------------+-----------
0 00 Fa0/7 Passive 0
0 00 Fa0/6 Passive 0
Time since last port bundled: 00d:00h:11m:41s Fa0/6
Group: 2
----------
Port-channels in the group:
---------------------------
Port-channel: Po2 (Primary Aggregator)
------------
Age of the Port-channel = 00d:00h:11m:41s
Logical slot/port = 2/2 Number of ports = 2
GC = 0x00000000 HotStandBy port = null
Port state = Port-channel
Protocol = LACP
Port Security = Disabled
Ports in the Port-channel:
Index Load Port EC state No of bits
------+------+------+------------------+-----------
0 00 Fa0/10 Active 0
0 00 Fa0/11 Active 0
Time since last port bundled: 00d:00h:11m:40s Fa0/11
