Data Domain: SNMP Traps Fail After DDOS Upgrade to DDOS 8.3 or 8.1

Applies to:

• System upgraded to DDOS versions before 8.3.1.10 AND 8.1.x, for example: DDOS system upgraded from 7.13.1.40 to 8.3.1.10

When an SNMP configuration includes a port appended to the IP address, the following symptoms appear:

• SNMP traps are not sent.
• The log messages.engineering displays "Invalid IP address" errors.
• The error message shows the IP and port concatenated with "!!."

Example log entries in messages.engineering:

#log view debug/messages.engineering

2023-10-08 09:52:43 xxxxx emsmon: ERROR: Invalid IP address: xxxxx!!162
2023-10-08 09:52:46 xxxxx emsmon: ERROR: Invalid IP address: xxxxx!!162
2023-10-08 09:53:09 xxxxx emsmon: ERROR: Invalid IP address: xxxxx!!162
2023-10-08 09:55:09 xxxxx emsmon: ERROR: Invalid IP address: xxxxx!!162

The issue originates from an issue introduced in version 8.3 when a new validation check was added for the IP address configured for SNMP traps.

The check expects a pure IP address, but the implementation incorrectly passes the IP and port together as a single string formatted IP!!Port.

Because this combined string is not a valid IP address, the validation fails, preventing the trap from being sent.

Fix:

• Upgrade DDOS to version 8.3.1.20 (LTS) or 8.4.x, where the issue is corrected.
  1. Download the appropriate package from the Dell Support portal.
  2. Install the package following the standard upgrade procedure as described in the DDOS Administration Guide for the given release.

Workaround:

1. Check if the SNMP trap port has been specified.
   • If the port has been specified, it shows as a number, otherwise shows as 'Default' (the default is port 162):

# snmp show trap-hosts
SNMP v2c Trap Hosts:
--------------------
   Trap Host   Port   Community
   ---------   ----   ---------
   x.x.x.x     162    x.x.x.x
   ---------   ----   ---------

2. Remove the trap-host entry:

# snmp del trap-host x.x.x.x

3. Add it without specifying a port:

# snmp add trap-host x.x.x.x version v2c community x.x.x.x

The same can be achieved in the DDOS graphical interface by removing the port number from the trap-host configuration found in Administration > Settings > SNMP