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Inter-VLAN communication blocking on Cisco SG350 with LAG

BRRG Posted messages 8 Registration date   Status Member Last intervention   -  
BRRG Posted messages 8 Registration date   Status Member Last intervention   -

Hello

I want to configure a lag between a Cisco SG350-28MP switch and a Cisco RV345P router. When I enable the lag on the switch, I allow communication with the router. I have access to the interfaces by connecting directly via RJ45 to either the switch or the router.

I followed this tutorial to configure on the switch https://www.cisco.com/c/fr_ca/support/docs/smb/switches/cisco-350x-series-stackable-managed-switches/smb5098-configuring-link-aggregation-groups-on-the-sg350xg-and-sg550.html.

I tried to disable spanning tree, but nothing changed.

In the logs, I found these two messages:

  • %2SWTRUNK-I-TRNKPORTPARAM: flow control of port gi26 differ from flow control of Po1 %2SWTRUNK-I-TRNKPORTPARAM: flow control of port gi25 differ from flow control of Po1
  • %SNTP-D-NTPBADVER: NTP server version not compatible

I don't know where to focus my attention to fix the issue. Do you have any ideas?

2 answers

  1.
    brupala Posted messages 111157 Registration date   Status Member Last intervention   14 453
     

    Hi,

    I don't know what kind of Ethernet flow control these Cisco devices have, but they don't seem compatible; it's better to disable it.

    jumbo frames?

    And there you go....

    But goodness, those line spacings are so annoying!!

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    1. BRRG Posted messages 8 Registration date   Status Member Last intervention   4
       

      I can't enable "flow control".

      I've done the rest, but it didn't restore communication between the VLANs.

      I've lost internet (which I had with a static IP while on VLAN 40)

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    2. BRRG Posted messages 8 Registration date   Status Member Last intervention   4
       

      I tried a lot of little settings, but the "link" between the switch and the router is down. Can't get them to communicate.

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  2. brupala Posted messages 111157 Registration date   Status Member Last intervention   14 453
     

    Maybe some OS updates?

    And here we go ....

    But misery, how annoying the line spacing is!!

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    1. BRRG Posted messages 8 Registration date   Status Member Last intervention   4
       

      For me, it's good

      System Description: SG350-28MP 28-Port Gigabit PoE Managed SwitchSystem

      Host Name: SG350-28MP

      Firmware Version (Active Image): 2.5.9.54

      Firmware MD5 Checksum (Active Image): ca342eaaf641de230bc89ddf9783b513 Firmware Version (Non-active): 2.5.0.83

      Firmware MD5 Checksum (Non-active): 07968d912499cff5e8b07fdc24779854

      Locale: zh-CN

      Language Version: 2.5.0.63

      Locale: ja-JP

      Language Version: 2.5.0.63

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