I have aCommCell in my Datacenter where customers connect their clients and mediaagents to via one-way firewall. so all clients cann open a connection to commserv via a port-forwarding gateway.
every some days i see in the logs that one client looses the connection and reopens a tunnel. this is not a big problem when no backup or restore is running. when it happens during a backup the current task gets an error. when it happens during a restore the restore might fail.
this is an example of the error:
1488 1058 11/14 00:35:47 TN:00020 ######## ERROR: cvfwd_iot_wait(): Got READ error on DYNAMIC tunnel from "pinf06" to "10092_psrv01" via (172.25.0.6, 220.127.116.11) on fd=6128: The specified network name is no longer available.
1488 1058 11/14 00:35:47 TN:00020 ######## ERROR: cvfwd_reset_tunnel(): Ungraceful termination of DYNAMIC tunnel from "pinf06" to "10092_psrv01" via (172.25.0.6, 18.104.22.168)
1488 1058 11/14 00:35:47 TN:00020 ######## ERROR: cvfwd_reset_tunnel(): Resetting DYNAMIC tunnel from "pinf06" to "10092_psrv01" via (172.25.0.6, 22.214.171.124)
Client-readyness is always fine and it affects any client so its not related to a customer or client. it happens on all of my commcells and there are various network-paths so its not related to one network path.
what i seen so far is that its worst when there is high network load between the client and the commserv.
for example when i do a persitent recovery from the mediaagent at a client-site to the comserv. then this happens more often.
the customers are conneted with slow internet-connections < 10MBit, sometimes even <2MBit
has anyone of you seen the same errors in his firewall-log. are there any parameters to tune? i allready changed the keep-alive interval and encryption but it doesnot help.
i had a support ticket open for this problem but the support couldnot really help.
It seems that commvault bas a problem under slow or loaded network-conditions.
CommVault Version: v11 sp9 - all hotfixes installed
Clients, Mediaagents and CommServ are Windows Systems (mostly 2016)