Hello community,
we dealed with this bug today at Cisco SBS University. We have SG220, SG350, SG350X and SF550X all connected in one L2 segment. All switches are in the default setup with the latest FW (2.4.0.94).
If they have received IP address from DHCP with 8.8.8.8 DNS, all works as desired. When we changed DNS IP at DHCP server to be the same as gateway (192.168.111.1), switches started to periodically reboot with the error below.
If I switch the firmware to the older 2.3.0.130, all work well.
31-May-2018 02:36:58 %BOOTP_DHCP_CL-W-DHCPIPCANDIDATE: The device is waiting for IP address verification on interface Vlan 1 , IP 192.168.111.240, mask 255.255.255.0, DHCP server 192.168.111.1
31-May-2018 02:37:00 %BOOTP_DHCP_CL-I-DHCPCONFIGURED: The device has been configured on interface Vlan 1 , IP 192.168.111.240, mask 255.255.255.0, DHCP server 192.168.111.1
31-May-2018 02:37:01 %SYSLOG-F-FATALUSINGNORMAL: Attempt to log an emergency message using the SYSLOGG_log interface.
Bad application id is 68 of component 8, bad message id is 73.
***** FATAL ERROR *****
Reporting Task: DNSC.
Software Version: 2.4.0.94 (date May 31 2018 time 02:37:28)
ros(HOSTG_fatal_error+0x14) [0x2e62a4]
ros(OSSYSG_fatal_error+0x134) [0x8752ec]
ros() [0x693ec0]
ros() [0x33a378]
ros() [0x33a45c]
ros() [0x33b4a8]
ros() [0x342b7c]
ros() [0x343f8c]
/lib/libp2linux.so.1(+0x3aa4) [0xb6f83aa4]
/lib/libpthread.so.0(+0x6e64) [0xb6f5ee64]
***** END OF FATAL ERROR *****
