Re: snmpwalk and ipv6 address

You configured snmpd to listen on ::1, but you
asked fe80::3e97:eff:fe8b:f326.  It's not listening
on fe80::3e97:eff:fe8b:f326, so it will not respond.  As you say, when you
make your request to ::1, it works.

"udp6:[::1]:161" is the equivalent of "udp:127.0.0.1:161".  If you want to
listen to the wildcard, you don't specify an address -- just use "udp6:161".

  Bill


On Tue, Nov 3, 2015 at 7:35 AM, Pushpa Thimmaiah <[email protected]
> wrote:

> Hi Folks,
>
>  I am using ubuntu and ifconfig eth0 says 'inet6 addr:*
> fe80::3e97:eff:fe8b:f326/64'*
> I have tried snmpwalk with ipv6 ipaddress (mentioned below) and it works
> fine
> snmpwalk -v 2c -c public1 'udp6:[::1]:161'
>
> But snmpwalk fails when  i used fe80::3e97:eff:fe8b:f326
>
> $ snmpwalk -v 2c -c public1 "udp6:[fe80::3e97:eff:fe8b:f326]:161"
> Timeout: No Response from udp6:[fe80::3e97:eff:fe8b:f326]:161
>
> snmpget -v 2c -c public1 udp6:'[*fe80::3e97:eff:fe8b:f326*%eth0]':161
> .1.3.6.1.2.1.1.1.0
> Timeout: No Response from udp6:[fe80::3e97:eff:fe8b:f326%eth0]:161.
>
>
> Details:
> 1. ping works
> $ ping6 -c 5 -I eth0 fe80::3e97:eff:fe8b:f326
> PING fe80::3e97:eff:fe8b:f326(fe80::3e97:eff:fe8b:f326) from
> fe80::3e97:eff:fe8b:f326 eth0: 56 data bytes
> 64 bytes from fe80::3e97:eff:fe8b:f326: icmp_seq=1 ttl=64 time=0.034 ms
> 64 bytes from fe80::3e97:eff:fe8b:f326: icmp_seq=2 ttl=64 time=0.047 ms
>
> 2. snmpagent listening to ipv6 address and community name 'public1' is ipv6
> rocommunity6 public1 default
> agentAddress udp:161,udp6:[::1]:161,tcp:161,tcp6:[::1]:161
>
> 3. ipv6 enabled
> ~$ net-snmp-config --configure
>  '--build=x86_64-linux-gnu' '--includedir=/usr/include'
> '--mandir=/usr/share/man' '--infodir=/usr/share/info'
> '--localstatedir=/var' '--libexecdir=/usr/lib/net-snmp'
> '--disable-maintainer-mode' '--disable-dependency-tracking' '--prefix=/usr'
> '--sysconfdir=/etc' '--mandir=/usr/share/man'
> '--with-persistent-directory=/var/lib/snmp'
> '--enable-ucd-snmp-compatibility' '--enable-shared' '--with-cflags=-g -O2
> -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security
> -DNETSNMP_USE_INLINE' '--with-perl-modules=INSTALLDIRS=vendor'
> '--enable-as-needed' *'--enable-ipv6'* '--with-logfile=none'
> '--without-rpm' '--with-libwrap' '--with-openssl' '--without-dmalloc'
> '--without-efence' '--without-rsaref' '--with-sys-contact=root'
> '--with-sys-location=Unknown' '--with-mib-modules=host smux ucd-snmp/dlmod
> ucd-snmp/diskio ucd-snmp/lmSensors  host' '--with-out-mib-modules='
> '--enable-mfd-rewrites' '--with-mnttab=/etc/mtab'
> '--with-mibdirs=/home/test/.snmp/mibs:/usr/share/mibs/site:/usr/share/snmp/mibs:/usr/share/mibs/iana:/usr/share/mibs/ietf:/usr/share/mibs/netsnmp'
> '--with-defaults' 'build_alias=x86_64-linux-gnu' 'CFLAGS=-g -O2
> -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security'
> 'LDFLAGS=-Wl,-Bsymbolic-functions -Wl,-z,relro'
> 'CPPFLAGS=-D_FORTIFY_SOURCE=2'
> pushpa@CLPMYSFC067:~$
>
> Please let me know for more details
>
> Thank you,
> Pushpa.T
>
>
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