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Multicast issue (one way only) between SG300-52 and SG350-XG-2F10

Hello folks,

I have two switches connected via LAG 1 (SG300-52; gi47 and gi48 in LACP LAG ---> SG350; XG1/9 and XG1/10 in LACP LAG1).

I have two vlans on the switches (vlan 10 and vlan 11) in addition to native vlan 1.    I have dual nic workstations (live on SG350) and servers (live on SG300) with one which communicate using jumbo frames.

Our software runs successfully between two workstations on the SG350, and between two servers on the SG300.  Running the software from the workstation works properly when a server is the receiver.  However, running from a server to the workstation doesn't work and frames are dropped.

Using "ping -D -s 8184" shows that jumbo packets work.

From the SG300-52:

================

#sho ip igmp snooping mrouter interface 11

Vlan        Dynamic               Static             Forbidden       

----- -------------------- -------------------- --------------------

11                                                                 

# From the sho run...

<snip>

port jumbo-frame

bridge multicast filtering

......

ip igmp snooping

ip igmp snooping vlan 1

ip igmp snooping vlan 1 immediate-leave

ip igmp snooping vlan 11

ip igmp snooping vlan 11 immediate-leave

ip igmp snooping vlan 1 querier

ip igmp snooping vlan 11 querier


#sho interface Port-channel1

Load balancing: src-dst-mac.

Gathering information...

Channel  Ports

-------  -----

Po1      Active: gi47-48

==================

From the SG350:

================

#sho ip igmp snooping mrouter interface 11

Vlan        Dynamic               Static             Forbidden       

----- -------------------- -------------------- --------------------

11          Po1                         

# From the sho run:

<snip>

..

port jumbo-frame

bridge multicast filtering

....

interface vlan 11

ip igmp version 2

!

.....

ip igmp snooping

ip igmp snooping vlan 1                               

ip igmp snooping vlan 1 immediate-leave

ip igmp snooping vlan 11

ip igmp snooping vlan 11 immediate-leave

no ip igmp snooping querier

no ip igmp snooping vlan 1 querier election

ip igmp snooping vlan 11 querier

#sho interface Port-channel1

Load balancing: src-dst-mac.

Gathering information...

Channel  Ports

-------  -----

Po1      Active: te1/0/9-10

I'm at a loss to explain why the software is run from a workstation on the SG350, a server on the SG300 receives the packet properly.  However,

when the software is run from the server on the SG300, the workstation gets only partial packets and it looks like the switch drops them.

I'm not that familiar with the business switches, but I believe the LAGS are configured properly:

From the SG300:

#sho vlan

Created by: D-Default, S-Static, G-GVRP, R-Radius Assigned VLAN, V-Voice VLAN

Vlan       Name           Tagged Ports      UnTagged Ports      Created by    

---- ----------------- ------------------ ------------------      ----------------

1           1                            gi22,gi41-43,Po1-8        V             

10     first                     Po1         gi1-21,gi24-40          S         

11         second            Po1          gi44-46,gi47-gi48           S         

From the SG350:

sho vlan

Created by: D-Default, S-Static, G-GVRP, R-Radius Assigned VLAN, V-Voice

VLAN

Vlan       Name           Tagged Ports      UnTagged Ports      Createdby    

---- ----------------- ------------------ ----------------------------------

1           1                            te1/0/1,te1/0/5-6,        DV        

                                          te1/0/12-52,                        

                                          te2/0/1-52,                         

                                          te3/0/1-52,                         

                                          te4/0/1-52,Po1-8                    

10     first         Po1           te1/0/2-4             S         

11         second             Po1       te1/0/7-8,tr2/0/9-te1/0/10        S         

I'm grateful for any suggestion on how to debug this issue.

Thanks,

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