snmpd failure when specifying agentaddress in snmpd.conf

I am seeing strange failure while specifying "agentaddress 161" in
snmpd.conf. If I comment out the line in snmpd.conf, snmpd comes up fine.
Following are the snippet from failure and success logs, respectively.

Any help will be appreciated.

Thanks,
Sudhanshu

Does not work:

============

trace: netsnmp_ds_set_string(): default_store.c, 280:

netsnmp_ds_set_string: Setting LIB:27 = "(null)"

trace: netsnmp_lookup_default_domains(): snmp_service.c, 200:

defaults: netsnmp_lookup_default_domain("snmp") -> "udp" "udp6"

trace: netsnmp_tdomain_transport_full(): snmp_transport.c, 568:

tdomain: Use application default domains "udp" "udp6"

trace: find_tdomain(): snmp_transport.c, 427:

tdomain: Found domain "udp" from specifier "udp"

trace: netsnmp_lookup_default_target(): snmp_service.c, 388:

defaults: netsnmp_lookup_default_target("snmp", "udp") -> ":161"

trace: netsnmp_tdomain_transport_full(): snmp_transport.c, 597:

tdomain: trying domain "udp" address "161" default address ":161"

trace: netsnmp_sockaddr_in2(): transports/snmpIPv4BaseDomain.c, 66:

netsnmp_sockaddr_in: addr 0x7fffa085b0e0, inpeername "161", default_target
":161"

trace: netsnmp_sockaddr_in2(): transports/snmpIPv4BaseDomain.c, 66:

netsnmp_sockaddr_in: addr 0x7fffa085b0e0, inpeername ":161", default_target
"[NIL]"

trace: netsnmp_sockaddr_in2(): transports/snmpIPv4BaseDomain.c, 121:

netsnmp_sockaddr_in: check user service 161

trace: netsnmp_sockaddr_in2(): transports/snmpIPv4BaseDomain.c, 180:

netsnmp_sockaddr_in: return { AF_INET, 0.0.0.0:161 }

trace: netsnmp_sockaddr_in2(): transports/snmpIPv4BaseDomain.c, 121:

netsnmp_sockaddr_in: check user service 161

trace: netsnmp_sockaddr_in2(): transports/snmpIPv4BaseDomain.c, 180:

netsnmp_sockaddr_in: return { AF_INET, 0.0.0.0:161 }

trace: netsnmp_udpipv4base_transport(): transports/snmpUDPIPv4BaseDomain.c,
83:

netsnmp_udpbase: open local UDP: [0.0.0.0]:161->[0.0.0.0]:0

trace: netsnmp_udpipv4base_transport(): transports/snmpUDPIPv4BaseDomain.c,
87:

UDPBase: openned socket 7 as local=1

trace: _sock_buffer_size_get(): transports/snmpSocketBaseDomain.c, 199:

socket:buffer: Requested server send buffer is 0

verbose:socket:buffer: Original server send buffer is 122880

verbose:socket:buffer: New server send buffer size is smaller than original!

socket:buffer: server send buffer not valid or not specified; using OS
default(122880)

trace: _sock_buffer_size_get(): transports/snmpSocketBaseDomain.c, 199:

socket:buffer: Requested server receive buffer is 0

verbose:socket:buffer: Original server receive buffer is 122880

verbose:socket:buffer: New server receive buffer size is smaller than
original!

socket:buffer: server receive buffer not valid or not specified; using OS
default(122880)

trace: netsnmp_udpipv4base_transport(): transports/snmpUDPIPv4BaseDomain.c,
121:

netsnmp_udpbase: set IP_PKTINFO

trace: find_tdomain(): snmp_transport.c, 431:

tdomain: Found no domain from specifier "udp6"

Error opening specified endpoint "161"

Server Exiting with code 1



Works:

============

trace: netsnmp_lookup_default_domains(): snmp_service.c, 200:

defaults: netsnmp_lookup_default_domain("snmp") -> "udp" "udp6"

trace: netsnmp_tdomain_transport_full(): snmp_transport.c, 568:

tdomain: Use application default domains "udp" "udp6"

trace: find_tdomain(): snmp_transport.c, 427:

tdomain: Found domain "udp" from specifier "udp"

trace: netsnmp_lookup_default_target(): snmp_service.c, 388:

defaults: netsnmp_lookup_default_target("snmp", "udp") -> ":161"

trace: netsnmp_tdomain_transport_full(): snmp_transport.c, 597:

tdomain: trying domain "udp" address "" default address ":161"

trace: netsnmp_sockaddr_in2(): transports/snmpIPv4BaseDomain.c, 66:

netsnmp_sockaddr_in: addr 0x7fff7d378770, inpeername "", default_target
":161"

trace: netsnmp_sockaddr_in2(): transports/snmpIPv4BaseDomain.c, 66:

netsnmp_sockaddr_in: addr 0x7fff7d378770, inpeername ":161", default_target
"[NIL]"

trace: netsnmp_sockaddr_in2(): transports/snmpIPv4BaseDomain.c, 121:

netsnmp_sockaddr_in: check user service 161

trace: netsnmp_sockaddr_in2(): transports/snmpIPv4BaseDomain.c, 180:

netsnmp_sockaddr_in: return { AF_INET, 0.0.0.0:161 }

trace: netsnmp_sockaddr_in2(): transports/snmpIPv4BaseDomain.c, 180:

netsnmp_sockaddr_in: return { AF_INET, 0.0.0.0:161 }

trace: netsnmp_udpipv4base_transport(): transports/snmpUDPIPv4BaseDomain.c,
83:

netsnmp_udpbase: open local UDP: [0.0.0.0]:161->[0.0.0.0]:0

trace: netsnmp_udpipv4base_transport(): transports/snmpUDPIPv4BaseDomain.c,
87:

UDPBase: openned socket 6 as local=1

daemonize: sysname 'Linux',

release '2.6.30.2-37403-dbg',

version '#1 SMP Thu Feb 21 16:35:50 PST 2013',

machine 'x86_64'

trace: _sock_buffer_size_get(): transports/snmpSocketBaseDomain.c, 199:

socket:buffer: Requested server send buffer is 0

verbose:socket:buffer: Original server send buffer is 122880

verbose:socket:buffer: New server send buffer size is smaller than original!

socket:buffer: server send buffer not valid or not specified; using OS
default(122880)

trace: _sock_buffer_size_get(): transports/snmpSocketBaseDomain.c, 199:

socket:buffer: Requested server receive buffer is 0

verbose:socket:buffer: Original server receive buffer is 122880

verbose:socket:buffer: New server receive buffer size is smaller than
original!

socket:buffer: server receive buffer not valid or not specified; using OS
default(122880)

trace: netsnmp_udpipv4base_transport(): transports/snmpUDPIPv4BaseDomain.c,
121:

netsnmp_udpbase: set IP_PKTINFO

trace: netsnmp_register_agent_nsap(): snmp_agent.c, 1084:

netsnmp_register_agent_nsap: fd 6

trace: netsnmp_sess_config_and_open_transport(): snmp_api.c, 1515:

snmp_sess: opening transport: 20

trace: snmp_sess_add_ex(): snmp_api.c, 1753:

snmp_sess_add: fd 6

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