T1672-T1682 LACP in details.

a, topology:

FG-A =====----- Nexus-A
|.......\.../....|
|........\./.....|
(ha)........X......|
|......../.\.....|
|......./...\....|
FG-B =====----- Nexus-B


b, LACP.
--1, output from FGT side.
5060-s1 # d switch fabric-channel trunk list 156Trunk
Switch Trunk Information, fabric-Channel
Trunk Name: 156Trunk
Port Selection Algorithm: src-dst-ip

Active Port Update Time
___________ ____________________

f2 04:17:25 Aug-16-1985
f3 03:39:07 Aug-16-1985

Non-Active Port Status
_______________ ____________________

LACP flags: (A|P)(S|F)(A|I)(I|O)(E|D)(E|D)
(A|P) - LACP mode is Active or Passive
(S|F) - LACP speed is Slow or Fast
(A|I) - Aggregatable or Individual
(I|O) - Port In sync or Out of sync
(E|D) - Frame collection is Enabled or Disabled
(E|D) - Frame distribution is Enabled or Disabled

status: up
ports: 2
LACP mode: active
LACP speed: fast
aggregator ID: 1
actor key: 1
actor MAC address: 00:09:0f:62:0d:d2
partner key: 1
partner MAC address: 00:22:56:b9:6e:40

slave: f2
status: up
link failure count: 2180
permanent MAC addr: 00:09:0f:62:0d:d2
actor state: ASAIEE =>FSW works as Active, slow,Aggregate, in sync, collection enabled and distribution enabled.
partner state: PSAIEE =>Nexus works as passive, slow,Aggregate, in sync, collection enabled and distribution enabled.
aggregator ID: 1

slave: f3
status: up
link failure count: 2172
permanent MAC addr: 00:09:0f:62:0d:d3
actor state: AFAIEE
partner state: PSAIEE
aggregator ID: 1


5060-s1 #


========================
output from ticket:
Active Port Update Time
___________ ____________________

f1 15:42:50 Feb-09-2012
f2 15:53:00 Feb-09-2012

...

actor state: ASAIEE
partner state: PFAIDD ==> Nexus is passive, fast mode, in sync, but collection disabled and distribution disabled.

FGT will send the traffic to the peer since the trunk is under the condition that distribution enabled. packet lost.


fast|slow is the setting to tell the peer how fast it should send LACP bpdu out.
FSW:
set lacp-speed fast
Cisco:
lacp rate fast ( not support in 4900)

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