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Many messages in device logs because someone try to login with community name beign null

Publication Date:  2013-04-23 Views:  101 Downloads:  0

Issue Description

In device logs has many message like:

Mar 3 2013 18:14:02 NTG-PE-NE40E-2 %%01SNMP/4/SNMP_FAIL(l)[510]:Failed to login through SNMP. (Ip=, Times=6, Reason=the community was incorrect)
Customer is asking why such message are appear, even if hi configure acl for access by special community.
 snmp-agent community read  aheron acl 2002
 snmp-agent community write  empire acl 2002

Handling Process

Use command display statistics acl 2002 control-plane to check is this rule from acl is applyed. 

Root Cause

Appearing this logs regulate by documentation. If someone has try to login on device by snmp with null community, system is reported about it.


Based on documentaion: NOTE: If receiving a packet with the community name field being null, the device directly discards the packet without filtering the packet based on the ACL rule. In addition, the log about the community name error is generated. ACL filtering is triggered only when the community name is not null. That means such logs is appeared every time when someone want to login on device with null community. It's like protection mechanism of Huawei device's. Such logs has not affected on device perfomances.