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GS728TS Stack issues with interfaces and LAG's
Hi, We have 2 x GS728TS switches (running firmware 5.3.0.26) connected together in a stack with dual stacking cables. There are 4 servers connected to the stack via LAG's. Each LAG consists of 4 members and 2 VLAN's, 2 on each switch in the stack. Each server runs multiple VMs. Until recently everything was running fine. However last week we suddenly picked in an issue where some (not all) VM's on one host could not communicate with VM's on other hosts and vise-versa. After investigating, we discovered that the ARP table entries on the troublesome VM's did not contain the correct entries. Restarting the VM did not resolve this. so I restarted the stack and after a long time (15 min) the stack came up and most of the issues disappeared, but not entirely. So I checked the address table on the switch stack and found that this contains 'wrong' entries as well. It shows that some learnt mac addresses are on specific interfaces in place of on a LAG, and also sometimes these interfaces are not even part of the specified LAG. If I power down one of the switches and keep it powered down (either one) then everything starts working correctly again. Anyone have any ideas? Thanks ShaunSolved9.6KViews0likes7Comments