Dear Bacula community,

Would like to request advice with an issue - we are having trouble with our first Debian 10 (testing) bacula client


Backup Server is Debian 9 Linux, packages are:

server# apt-show-versions | grep bacula
bacula-bscan:amd64/stretch 7.4.4+dfsg-6 uptodate
bacula-common:amd64/stretch 7.4.4+dfsg-6 uptodate
bacula-common-sqlite3:amd64/stretch 7.4.4+dfsg-6 uptodate
bacula-director:amd64/stretch 7.4.4+dfsg-6 uptodate
bacula-director-sqlite3:amd64/stretch 7.4.4+dfsg-6 uptodate
bacula-fd:amd64/stretch 7.4.4+dfsg-6 uptodate
bacula-sd:amd64/stretch 7.4.4+dfsg-6 uptodate
server#


server is able to back up windows and linux clients on the same subnet without issue.  All linux clients so gffar backed up are on bacula 7 client in DEbian 9


Enter a new box, a debian 10 testing box with Bacula 9x client packages:

deb10-client#  apt-show-versions | grep bacula


bacula-common:amd64/buster 9.0.7+dfsg-2 uptodate
bacula-fd:amd64/buster 9.0.7+dfsg-2 uptodate
deb10-client#


The error we get when we try to back up the Deb10-client with the Bacula 7.x server is:


Fatal error: bsock.c:569 Packet size=1073741963 too big from "client:10.155.60.19:9103. Terminating connection



BTW: the linux clients on the same subnet that I can backup with the same server just fine are running versions:

deb9-clients# apt-show-versions | grep bacula
bacula-common:amd64/stretch 7.4.4+dfsg-6 uptodate
bacula-fd:amd64/stretch 7.4.4+dfsg-6 uptodate

deb9-clients#


Q:   Does the Bacula server version 7.4.4 support backing up a client running bacula client 9.0.7 ?

Q:   What else can I look for in order to debug this client?

Q:  The Deb10 client has 2 network interfaces.  The one that the backup server can reach has MTU 1500.

The private only network 192.168 that the backup server cant reach  has mtu 9000  - is there any chance this is causing an issue?


Thanks in advance!

-Matt






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