Re: NET-SNMP version: 5.7.3 and IPv6

I don't have any other suggestions here, other than trying a rebuild from
scratch to make sure you have a self-consistent tree. I'm not familiar with
cross compiling. rocommunity6 works for me when I specify it in my
natively-compiled agent.

  Bill


On Thu, Jan 25, 2018 at 9:29 AM, Simon Chamlian <[email protected]>
wrote:

>   SNMP Versions Supported:    1 2c 3
>   Building for:               linux
>   Net-SNMP Version:           5.7.3
>   Network transport support:  Callback Unix Alias TCPIPv6 UDPIPv6 UDP TCP
> IPv6Base SocketBase TCPBase UDPBase UDPIPv4Base IPv4Base
>   SNMPv3 Security Modules:     usm
>   *** MIB Module warning *** mib module '\' is both included and excluded.
> It has been excluded.
>   Agent MIB code:            default_modules ..... =>  snmpv3mibs
> mibII/snmp_mib mibII/system_mib mibII/sysORTable mibII/vacm_vars
> mibII/vacm_conf
>   MYSQL Trap Logging:         unavailable
>   Embedded Perl support:      disabled
>   SNMP Perl modules:          disabled
>   SNMP Python modules:        disabled
>   Crypto support from:        crypto
>   Authentication support:     MD5
>   Encryption support:
>   Local DNSSEC validation:    disabled
>
> Note that I am cross compiling net-snmp for an embedded target.
> I wonder if I am forgetting to download something?
>
> I usually download the applications and libraries:
> libnetsnmphelpers.so.30.0.3
> libnetsnmp.so.30.0.3
> libnetsnmpmibs.so.30.0.3
> libnetsnmpagent.so.30.0.3
> libnetsnmptrapd.so.30.0.3
>
> S.
>
>
> On Wed, Jan 24, 2018 at 11:57 AM, Bill Fenner <[email protected]> wrote:
>
>> Can you paste the end of your configuration run, where it summarizes the
>> results? The “rocommunity6” configuration directive will be available if
>> that configuration summary includes “UDPIPv6” in the “Network transport
>> support:” list - e.g.,
>>
>> ---------------------------------------------------------
>>             Net-SNMP configuration summary:
>> ---------------------------------------------------------
>>
>>   SNMP Versions Supported:    1 2c 3
>>   Building for:               linux
>>   Net-SNMP Version:           5.8.pre1
>>   Network transport support:  Callback Unix Alias TCP UDP TCPIPv6 UDPIPv6 IPv4Base SocketBase TCPBase UDPIPv4Base UDPBase IPv6Base
>>
>> How did you build your net-snmp? Is there any chance that you built the
>> agent/ subdirectory without IPv6 support, and the snmplib/ subdirectory
>> with IPv6 support? That would cause “rocommunity6” to not work but
>> “agentaddress udp6:…” would work.
>>
>> Bill
>> ​
>>
>> On Wed, Jan 24, 2018 at 11:42 AM, Simon Chamlian <[email protected]>
>> wrote:
>>
>>> Seems like --enable-ipv6  is not enough to make SNMPv2 work with IPv6
>>> since:
>>>
>>> # ./snmpd  -H 2>&1 | grep community
>>>     trapsink                 host [community] [port]
>>>     trap2sink                host [community] [port]
>>>     informsink               host [community] [port]
>>>     trapcommunity            community-string
>>>     com2sec                  [-Cn CONTEXT] secName
>>> IPv4-network-address[/netmask] community
>>>     com2sec6                 [-Cn CONTEXT] secName
>>> IPv6-network-address[/netmask] community
>>>     com2secunix              [-Cn CONTEXT] secName sockpath community
>>>     authcommunity            authtype1,authtype2 community
>>> [default|hostname|network/bits [oid|-V view [context]]]
>>>     rwcommunity              community [default|hostname|network/bits
>>> [oid|-V view [context]]]
>>>     rocommunity              community [default|hostname|network/bits
>>> [oid|-V view [context]]]
>>>
>>> does not show  rwcommunity6 and rocommunity6 .
>>>
>>> So what other flags do I need in addition to (--enable-ipv6) to
>>> re-compile to make rwcommunity6/rocommunity6 available?
>>>
>>> S.
>>>
>>>
>>>
>>> On Mon, Jan 15, 2018 at 2:37 PM, Simon Chamlian <[email protected]>
>>> wrote:
>>>
>>>> Hi,
>>>>
>>>> Just recompiled the agent by enabling IPv6 (  --enable-ipv6).
>>>>
>>>> The agent is working fine but don't seem to be able to use IPv6.
>>>>
>>>> Example:
>>>>
>>>> # snmpget -v 3 -u Admin -a MD5 -A Admin-00 -l authNoPriv 172.27.42.199
>>>> MPBC-1RU-MIB::mpbc1RUNEID.0 -Oqv
>>>> "TestNew"
>>>>
>>>> works fine.
>>>>
>>>>
>>>> In Ipv6:
>>>>
>>>> # snmpget -v 3 -u Admin -a MD5 -A Admin-00 -l authNoPriv
>>>> udp6:'[fe80::6eff:beff:fe02:d0%eth0]':161 MPBC-1RU-MIB::mpbc1RUNEID.0
>>>> -Oqv
>>>> snmpget: Timeout
>>>>
>>>> I also tried without the port
>>>> # snmpget -v 3 -u Admin -a MD5 -A Admin-00 -l authNoPriv
>>>> udp6:'[fe80::6eff:beff:fe02:d0%eth0]' MPBC-1RU-MIB::mpbc1RUNEID.0 -Oqv
>>>> snmpget: Timeout
>>>>
>>>>
>>>> Gives me timeout. What am I doing wrong? Do I need any special
>>>> instructions in snmpd.conf file?
>>>>
>>>> Note that when I launch the agent, I get the following error message in
>>>> the log:
>>>> Error opening specified endpoint ""
>>>> Server Exiting with code 1
>>>>
>>>> But the agent works fine with IPv4.
>>>>
>>>> Thanks,
>>>> S
>>>>
>>>>
>>>
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>>
>

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