Distributed trunking works, but package are lost and netwerk slows down

[claas_goltz]

Hi,

I created a distributed trunking with dt-lacp between an 5406 and 5412.

Both are recognizing the dt-lacp status with status successfull and its working. So I can remove cable a) from 5406 and the traffic is going over the 5412 switch. There is an 8GBit lacp switch interconnect trunk between both switches.

If I connect a Server with configured lacp bonding of 4 cables, then i have package losts.  2 cables goes into switch a) and two into b) configured as dt-lacp trunking. if the cables into switch b) are not connected, everything is fine. If only b or both are connectet I recognize packges losts.

If i connect the 4 cables at a suiteable configured lacp trunk at switch a), everything is fine. 

So is there an missconfigured Uplink between both switches?

What could be the reason?

My config:

switch a)

sw-bre-coreEG(config)#  sh distributed-trunking peer-keepalive

Distributed Trunking peer-keepalive parameters

  Destination   : 192.168.92.6                            

  VLAN          : 4092                                    

  UDP Port      : 1024                                    

  Interval(ms)  : 1000                                    

  Timeout(sec)  : 5    

sw-bre-coreEG(config)# sh switch-interconnect

Port         : Trk98

Status       : Up

Active VLANs : 1,12,22-23,32,42,47,52,102-105,360-365,945-948,960

sw-bre-coreEG(config)#  sh lacp distributed

to much, but everything is fine

switch b)

sw-bre-coreEG(config)#  show distributed-trunking peer-keepalive

Distributed Trunking peer-keepalive parameters

  Destination   : 192.168.92.5                            

  VLAN          : 4092                                    

  UDP Port      : 1024                                    

  Interval(ms)  : 1000                                    

  Timeout(sec)  : 5

sw-bre-sr-eg02(eth-B22)# show switch-interconnect

Port         : Trk98

Status       : Up

Active VLANs : 1,12,22-23,32,42,52,102-105,262,360-365,945-948,960

sw-bre-coreEG(config)#  sh lacp distributed

to much, but everything is fine

ps. the server side is configured for 802.3ad

thanks for helping me!

[Vince-Whirlwind]

can you show us a "show run" from each switch containing the interface configurations of the interfaces the server is patched to.

Can you show us a "show interface" for each of these 4 interfaces + the trunk interfaces.

On both switches, show us a "show interface" on each of the interfaces that do the interconnect (16 physical + 2 trunk = 18 interfaces total).

Swap the switch a) server patch leads over with the switch b) server patch leads (don't unpatch them from the server, just move the switch ends).

Does the problem stay on switch b)?