Check Listening Addresses
This scenario shows how to restrict the addresses used to listen for incoming requests in SNMPv3. In addition, the SNMP ‘walk’ and ‘table’ commands are checked.
Test SNMPv3
Description
Listening addresses are configured for a user in DUT0, and the ‘walk’ and ‘table’ commands are used to check incoming requests in SNMPv3 .
Scenario
Step 1: Set the following configuration in DUT0:
set interfaces ethernet eth0 address 10.0.0.1/24 set interfaces dummy dum0 address 20.0.0.1/24 set service snmp user USER2TEST
Step 2: Set the following configuration in DUT1:
set interfaces ethernet eth0 address 10.0.0.2/24
Note
Initially, local and DUT1 requests are allowed, since the ‘listen‘ field is set for all interfaces by default.
Step 3: Run command service snmp walk local-agent v3 USER2TEST oid ifTable at DUT0 and check if output matches the following regular expressions:
::ifDescr\.1 = STRING: "?lo"?Show output
IF-MIB::ifIndex.1 = INTEGER: 1 IF-MIB::ifIndex.2 = INTEGER: 2 IF-MIB::ifIndex.3 = INTEGER: 3 IF-MIB::ifIndex.78 = INTEGER: 78 IF-MIB::ifDescr.1 = STRING: lo IF-MIB::ifDescr.2 = STRING: Red Hat, Inc Device 0001 IF-MIB::ifDescr.3 = STRING: Red Hat, Inc Device 0001 IF-MIB::ifDescr.78 = STRING: dum0 IF-MIB::ifType.1 = INTEGER: softwareLoopback(24) IF-MIB::ifType.2 = INTEGER: ethernetCsmacd(6) IF-MIB::ifType.3 = INTEGER: ethernetCsmacd(6) IF-MIB::ifType.78 = INTEGER: ethernetCsmacd(6) IF-MIB::ifMtu.1 = INTEGER: 65536 IF-MIB::ifMtu.2 = INTEGER: 1500 IF-MIB::ifMtu.3 = INTEGER: 1500 IF-MIB::ifMtu.78 = INTEGER: 1500 IF-MIB::ifSpeed.1 = Gauge32: 10000000 IF-MIB::ifSpeed.2 = Gauge32: 0 IF-MIB::ifSpeed.3 = Gauge32: 0 IF-MIB::ifSpeed.78 = Gauge32: 0 IF-MIB::ifPhysAddress.1 = STRING: IF-MIB::ifPhysAddress.2 = STRING: de:ad:be:ef:6c:10 IF-MIB::ifPhysAddress.3 = STRING: de:ad:be:ef:6c:11 IF-MIB::ifPhysAddress.78 = STRING: fa:e4:e9:3a:cc:1b IF-MIB::ifAdminStatus.1 = INTEGER: up(1) IF-MIB::ifAdminStatus.2 = INTEGER: up(1) IF-MIB::ifAdminStatus.3 = INTEGER: down(2) IF-MIB::ifAdminStatus.78 = INTEGER: up(1) IF-MIB::ifOperStatus.1 = INTEGER: up(1) IF-MIB::ifOperStatus.2 = INTEGER: up(1) IF-MIB::ifOperStatus.3 = INTEGER: down(2) IF-MIB::ifOperStatus.78 = INTEGER: up(1) IF-MIB::ifLastChange.1 = Timeticks: (0) 0:00:00.00 IF-MIB::ifLastChange.2 = Timeticks: (0) 0:00:00.00 IF-MIB::ifLastChange.3 = Timeticks: (0) 0:00:00.00 IF-MIB::ifLastChange.78 = Timeticks: (0) 0:00:00.00 IF-MIB::ifInOctets.1 = Counter32: 97903 IF-MIB::ifInOctets.2 = Counter32: 908470745 IF-MIB::ifInOctets.3 = Counter32: 3474496004 IF-MIB::ifInOctets.78 = Counter32: 0 IF-MIB::ifInUcastPkts.1 = Counter32: 0 IF-MIB::ifInUcastPkts.2 = Counter32: 0 IF-MIB::ifInUcastPkts.3 = Counter32: 0 IF-MIB::ifInUcastPkts.78 = Counter32: 0 IF-MIB::ifInNUcastPkts.1 = Counter32: 0 IF-MIB::ifInNUcastPkts.2 = Counter32: 0 IF-MIB::ifInNUcastPkts.3 = Counter32: 0 IF-MIB::ifInNUcastPkts.78 = Counter32: 0 IF-MIB::ifInDiscards.1 = Counter32: 0 IF-MIB::ifInDiscards.2 = Counter32: 0 IF-MIB::ifInDiscards.3 = Counter32: 13 IF-MIB::ifInDiscards.78 = Counter32: 0 IF-MIB::ifInErrors.1 = Counter32: 0 IF-MIB::ifInErrors.2 = Counter32: 0 IF-MIB::ifInErrors.3 = Counter32: 0 IF-MIB::ifInErrors.78 = Counter32: 0 IF-MIB::ifInUnknownProtos.1 = Counter32: 0 IF-MIB::ifInUnknownProtos.2 = Counter32: 0 IF-MIB::ifInUnknownProtos.3 = Counter32: 0 IF-MIB::ifInUnknownProtos.78 = Counter32: 0 IF-MIB::ifOutOctets.1 = Counter32: 97903 IF-MIB::ifOutOctets.2 = Counter32: 2855002531 IF-MIB::ifOutOctets.3 = Counter32: 3474494922 IF-MIB::ifOutOctets.78 = Counter32: 0 IF-MIB::ifOutUcastPkts.1 = Counter32: 988 IF-MIB::ifOutUcastPkts.2 = Counter32: 1903574 IF-MIB::ifOutUcastPkts.3 = Counter32: 2459310 IF-MIB::ifOutUcastPkts.78 = Counter32: 0 IF-MIB::ifOutNUcastPkts.1 = Counter32: 0 IF-MIB::ifOutNUcastPkts.2 = Counter32: 0 IF-MIB::ifOutNUcastPkts.3 = Counter32: 0 IF-MIB::ifOutNUcastPkts.78 = Counter32: 0 IF-MIB::ifOutDiscards.1 = Counter32: 0 IF-MIB::ifOutDiscards.2 = Counter32: 0 IF-MIB::ifOutDiscards.3 = Counter32: 0 IF-MIB::ifOutDiscards.78 = Counter32: 0 IF-MIB::ifOutErrors.1 = Counter32: 0 IF-MIB::ifOutErrors.2 = Counter32: 0 IF-MIB::ifOutErrors.3 = Counter32: 0 IF-MIB::ifOutErrors.78 = Counter32: 0 IF-MIB::ifOutQLen.1 = Gauge32: 0 IF-MIB::ifOutQLen.2 = Gauge32: 0 IF-MIB::ifOutQLen.3 = Gauge32: 0 IF-MIB::ifOutQLen.78 = Gauge32: 0 IF-MIB::ifSpecific.1 = OID: SNMPv2-SMI::zeroDotZero IF-MIB::ifSpecific.2 = OID: SNMPv2-SMI::zeroDotZero IF-MIB::ifSpecific.3 = OID: SNMPv2-SMI::zeroDotZero IF-MIB::ifSpecific.78 = OID: SNMPv2-SMI::zeroDotZero
Step 4: Run command service snmp walk remote-agent 10.0.0.1 v3 USER2TEST oid ifTable at DUT1 and check if output matches the following regular expressions:
::ifDescr\.1 = STRING: "?lo"?Show output
IF-MIB::ifIndex.1 = INTEGER: 1 IF-MIB::ifIndex.2 = INTEGER: 2 IF-MIB::ifIndex.3 = INTEGER: 3 IF-MIB::ifIndex.78 = INTEGER: 78 IF-MIB::ifDescr.1 = STRING: lo IF-MIB::ifDescr.2 = STRING: Red Hat, Inc Device 0001 IF-MIB::ifDescr.3 = STRING: Red Hat, Inc Device 0001 IF-MIB::ifDescr.78 = STRING: dum0 IF-MIB::ifType.1 = INTEGER: softwareLoopback(24) IF-MIB::ifType.2 = INTEGER: ethernetCsmacd(6) IF-MIB::ifType.3 = INTEGER: ethernetCsmacd(6) IF-MIB::ifType.78 = INTEGER: ethernetCsmacd(6) IF-MIB::ifMtu.1 = INTEGER: 65536 IF-MIB::ifMtu.2 = INTEGER: 1500 IF-MIB::ifMtu.3 = INTEGER: 1500 IF-MIB::ifMtu.78 = INTEGER: 1500 IF-MIB::ifSpeed.1 = Gauge32: 10000000 IF-MIB::ifSpeed.2 = Gauge32: 0 IF-MIB::ifSpeed.3 = Gauge32: 0 IF-MIB::ifSpeed.78 = Gauge32: 0 IF-MIB::ifPhysAddress.1 = STRING: IF-MIB::ifPhysAddress.2 = STRING: de:ad:be:ef:6c:10 IF-MIB::ifPhysAddress.3 = STRING: de:ad:be:ef:6c:11 IF-MIB::ifPhysAddress.78 = STRING: fa:e4:e9:3a:cc:1b IF-MIB::ifAdminStatus.1 = INTEGER: up(1) IF-MIB::ifAdminStatus.2 = INTEGER: up(1) IF-MIB::ifAdminStatus.3 = INTEGER: down(2) IF-MIB::ifAdminStatus.78 = INTEGER: up(1) IF-MIB::ifOperStatus.1 = INTEGER: up(1) IF-MIB::ifOperStatus.2 = INTEGER: up(1) IF-MIB::ifOperStatus.3 = INTEGER: down(2) IF-MIB::ifOperStatus.78 = INTEGER: up(1) IF-MIB::ifLastChange.1 = Timeticks: (0) 0:00:00.00 IF-MIB::ifLastChange.2 = Timeticks: (0) 0:00:00.00 IF-MIB::ifLastChange.3 = Timeticks: (0) 0:00:00.00 IF-MIB::ifLastChange.78 = Timeticks: (0) 0:00:00.00 IF-MIB::ifInOctets.1 = Counter32: 97903 IF-MIB::ifInOctets.2 = Counter32: 908470745 IF-MIB::ifInOctets.3 = Counter32: 3474496004 IF-MIB::ifInOctets.78 = Counter32: 0 IF-MIB::ifInUcastPkts.1 = Counter32: 0 IF-MIB::ifInUcastPkts.2 = Counter32: 0 IF-MIB::ifInUcastPkts.3 = Counter32: 0 IF-MIB::ifInUcastPkts.78 = Counter32: 0 IF-MIB::ifInNUcastPkts.1 = Counter32: 0 IF-MIB::ifInNUcastPkts.2 = Counter32: 0 IF-MIB::ifInNUcastPkts.3 = Counter32: 0 IF-MIB::ifInNUcastPkts.78 = Counter32: 0 IF-MIB::ifInDiscards.1 = Counter32: 0 IF-MIB::ifInDiscards.2 = Counter32: 0 IF-MIB::ifInDiscards.3 = Counter32: 13 IF-MIB::ifInDiscards.78 = Counter32: 0 IF-MIB::ifInErrors.1 = Counter32: 0 IF-MIB::ifInErrors.2 = Counter32: 0 IF-MIB::ifInErrors.3 = Counter32: 0 IF-MIB::ifInErrors.78 = Counter32: 0 IF-MIB::ifInUnknownProtos.1 = Counter32: 0 IF-MIB::ifInUnknownProtos.2 = Counter32: 0 IF-MIB::ifInUnknownProtos.3 = Counter32: 0 IF-MIB::ifInUnknownProtos.78 = Counter32: 0 IF-MIB::ifOutOctets.1 = Counter32: 97903 IF-MIB::ifOutOctets.2 = Counter32: 2855002531 IF-MIB::ifOutOctets.3 = Counter32: 3474494922 IF-MIB::ifOutOctets.78 = Counter32: 0 IF-MIB::ifOutUcastPkts.1 = Counter32: 988 IF-MIB::ifOutUcastPkts.2 = Counter32: 1903574 IF-MIB::ifOutUcastPkts.3 = Counter32: 2459310 IF-MIB::ifOutUcastPkts.78 = Counter32: 0 IF-MIB::ifOutNUcastPkts.1 = Counter32: 0 IF-MIB::ifOutNUcastPkts.2 = Counter32: 0 IF-MIB::ifOutNUcastPkts.3 = Counter32: 0 IF-MIB::ifOutNUcastPkts.78 = Counter32: 0 IF-MIB::ifOutDiscards.1 = Counter32: 0 IF-MIB::ifOutDiscards.2 = Counter32: 0 IF-MIB::ifOutDiscards.3 = Counter32: 0 IF-MIB::ifOutDiscards.78 = Counter32: 0 IF-MIB::ifOutErrors.1 = Counter32: 0 IF-MIB::ifOutErrors.2 = Counter32: 0 IF-MIB::ifOutErrors.3 = Counter32: 0 IF-MIB::ifOutErrors.78 = Counter32: 0 IF-MIB::ifOutQLen.1 = Gauge32: 0 IF-MIB::ifOutQLen.2 = Gauge32: 0 IF-MIB::ifOutQLen.3 = Gauge32: 0 IF-MIB::ifOutQLen.78 = Gauge32: 0 IF-MIB::ifSpecific.1 = OID: SNMPv2-SMI::zeroDotZero IF-MIB::ifSpecific.2 = OID: SNMPv2-SMI::zeroDotZero IF-MIB::ifSpecific.3 = OID: SNMPv2-SMI::zeroDotZero IF-MIB::ifSpecific.78 = OID: SNMPv2-SMI::zeroDotZero
Step 5: Run command service snmp table local-agent v3 USER2TEST oid ifTable at DUT0 and check if output matches the following regular expressions:
SNMP table:.*::ifTableShow output
SNMP table: IF-MIB::ifTable ifIndex ifDescr ifType ifMtu ifSpeed ifPhysAddress ifAdminStatus 1 lo softwareLoopback 65536 10000000 up 2 Red Hat, Inc Device 0001 ethernetCsmacd 1500 0 de:ad:be:ef:6c:10 up 3 Red Hat, Inc Device 0001 ethernetCsmacd 1500 0 de:ad:be:ef:6c:11 down 78 dum0 ethernetCsmacd 1500 0 fa:e4:e9:3a:cc:1b up SNMP table IF-MIB::ifTable, part 2 ifOperStatus ifLastChange ifInOctets ifInUcastPkts ifInNUcastPkts ifInDiscards ifInErrors up 0:0:00:00.00 97903 0 0 0 0 up 0:0:00:00.00 908470745 0 0 0 0 down 0:0:00:00.00 3474496004 0 0 13 0 up 0:0:00:00.00 0 0 0 0 0 SNMP table IF-MIB::ifTable, part 3 ifInUnknownProtos ifOutOctets ifOutUcastPkts ifOutNUcastPkts ifOutDiscards ifOutErrors ifOutQLen 0 97903 988 0 0 0 0 0 2855002531 1903574 0 0 0 0 0 3474494922 2459310 0 0 0 0 0 0 0 0 0 0 0 SNMP table IF-MIB::ifTable, part 4 ifSpecific SNMPv2-SMI::zeroDotZero SNMPv2-SMI::zeroDotZero SNMPv2-SMI::zeroDotZero SNMPv2-SMI::zeroDotZero
Step 6: Run command service snmp table remote-agent 10.0.0.1 v3 USER2TEST oid ifTable at DUT1 and check if output matches the following regular expressions:
SNMP table:.*::ifTableShow output
SNMP table: IF-MIB::ifTable ifIndex ifDescr ifType ifMtu ifSpeed ifPhysAddress ifAdminStatus 1 lo softwareLoopback 65536 10000000 up 2 Red Hat, Inc Device 0001 ethernetCsmacd 1500 0 de:ad:be:ef:6c:10 up 3 Red Hat, Inc Device 0001 ethernetCsmacd 1500 0 de:ad:be:ef:6c:11 down 78 dum0 ethernetCsmacd 1500 0 fa:e4:e9:3a:cc:1b up SNMP table IF-MIB::ifTable, part 2 ifOperStatus ifLastChange ifInOctets ifInUcastPkts ifInNUcastPkts ifInDiscards ifInErrors up 0:0:00:00.00 97903 0 0 0 0 up 0:0:00:00.00 908470745 0 0 0 0 down 0:0:00:00.00 3474496004 0 0 13 0 up 0:0:00:00.00 0 0 0 0 0 SNMP table IF-MIB::ifTable, part 3 ifInUnknownProtos ifOutOctets ifOutUcastPkts ifOutNUcastPkts ifOutDiscards ifOutErrors ifOutQLen 0 97903 988 0 0 0 0 0 2855002531 1903574 0 0 0 0 0 3474494922 2459310 0 0 0 0 0 0 0 0 0 0 0 SNMP table IF-MIB::ifTable, part 4 ifSpecific SNMPv2-SMI::zeroDotZero SNMPv2-SMI::zeroDotZero SNMPv2-SMI::zeroDotZero SNMPv2-SMI::zeroDotZero
Note
After configuring SNMP to listen on the local address, local requests should be allowed, but not DUT1 requests.
Step 7: Set the following configuration in DUT0:
set interfaces dummy dum1 address 127.0.0.1/24 set service snmp listen address 127.0.0.1
Step 8: Run command service snmp walk local-agent v3 USER2TEST oid ifTable at DUT0 and check if output matches the following regular expressions:
::ifDescr\.1 = STRING: "?lo"?Show output
IF-MIB::ifIndex.1 = INTEGER: 1 IF-MIB::ifIndex.2 = INTEGER: 2 IF-MIB::ifIndex.3 = INTEGER: 3 IF-MIB::ifIndex.78 = INTEGER: 78 IF-MIB::ifIndex.79 = INTEGER: 79 IF-MIB::ifDescr.1 = STRING: lo IF-MIB::ifDescr.2 = STRING: Red Hat, Inc Device 0001 IF-MIB::ifDescr.3 = STRING: Red Hat, Inc Device 0001 IF-MIB::ifDescr.78 = STRING: dum0 IF-MIB::ifDescr.79 = STRING: dum1 IF-MIB::ifType.1 = INTEGER: softwareLoopback(24) IF-MIB::ifType.2 = INTEGER: ethernetCsmacd(6) IF-MIB::ifType.3 = INTEGER: ethernetCsmacd(6) IF-MIB::ifType.78 = INTEGER: ethernetCsmacd(6) IF-MIB::ifType.79 = INTEGER: ethernetCsmacd(6) IF-MIB::ifMtu.1 = INTEGER: 65536 IF-MIB::ifMtu.2 = INTEGER: 1500 IF-MIB::ifMtu.3 = INTEGER: 1500 IF-MIB::ifMtu.78 = INTEGER: 1500 IF-MIB::ifMtu.79 = INTEGER: 1500 IF-MIB::ifSpeed.1 = Gauge32: 10000000 IF-MIB::ifSpeed.2 = Gauge32: 0 IF-MIB::ifSpeed.3 = Gauge32: 0 IF-MIB::ifSpeed.78 = Gauge32: 0 IF-MIB::ifSpeed.79 = Gauge32: 0 IF-MIB::ifPhysAddress.1 = STRING: IF-MIB::ifPhysAddress.2 = STRING: de:ad:be:ef:6c:10 IF-MIB::ifPhysAddress.3 = STRING: de:ad:be:ef:6c:11 IF-MIB::ifPhysAddress.78 = STRING: fa:e4:e9:3a:cc:1b IF-MIB::ifPhysAddress.79 = STRING: 2:ad:71:6f:68:d6 IF-MIB::ifAdminStatus.1 = INTEGER: up(1) IF-MIB::ifAdminStatus.2 = INTEGER: up(1) IF-MIB::ifAdminStatus.3 = INTEGER: down(2) IF-MIB::ifAdminStatus.78 = INTEGER: up(1) IF-MIB::ifAdminStatus.79 = INTEGER: up(1) IF-MIB::ifOperStatus.1 = INTEGER: up(1) IF-MIB::ifOperStatus.2 = INTEGER: up(1) IF-MIB::ifOperStatus.3 = INTEGER: down(2) IF-MIB::ifOperStatus.78 = INTEGER: up(1) IF-MIB::ifOperStatus.79 = INTEGER: up(1) IF-MIB::ifLastChange.1 = Timeticks: (0) 0:00:00.00 IF-MIB::ifLastChange.2 = Timeticks: (0) 0:00:00.00 IF-MIB::ifLastChange.3 = Timeticks: (0) 0:00:00.00 IF-MIB::ifLastChange.78 = Timeticks: (0) 0:00:00.00 IF-MIB::ifLastChange.79 = Timeticks: (0) 0:00:00.00 IF-MIB::ifInOctets.1 = Counter32: 106853 IF-MIB::ifInOctets.2 = Counter32: 908474161 IF-MIB::ifInOctets.3 = Counter32: 3474496004 IF-MIB::ifInOctets.78 = Counter32: 0 IF-MIB::ifInOctets.79 = Counter32: 0 IF-MIB::ifInUcastPkts.1 = Counter32: 0 IF-MIB::ifInUcastPkts.2 = Counter32: 0 IF-MIB::ifInUcastPkts.3 = Counter32: 0 IF-MIB::ifInUcastPkts.78 = Counter32: 0 IF-MIB::ifInUcastPkts.79 = Counter32: 0 IF-MIB::ifInNUcastPkts.1 = Counter32: 0 IF-MIB::ifInNUcastPkts.2 = Counter32: 0 IF-MIB::ifInNUcastPkts.3 = Counter32: 0 IF-MIB::ifInNUcastPkts.78 = Counter32: 0 IF-MIB::ifInNUcastPkts.79 = Counter32: 0 IF-MIB::ifInDiscards.1 = Counter32: 0 IF-MIB::ifInDiscards.2 = Counter32: 0 IF-MIB::ifInDiscards.3 = Counter32: 13 IF-MIB::ifInDiscards.78 = Counter32: 0 IF-MIB::ifInDiscards.79 = Counter32: 0 IF-MIB::ifInErrors.1 = Counter32: 0 IF-MIB::ifInErrors.2 = Counter32: 0 IF-MIB::ifInErrors.3 = Counter32: 0 IF-MIB::ifInErrors.78 = Counter32: 0 IF-MIB::ifInErrors.79 = Counter32: 0 IF-MIB::ifInUnknownProtos.1 = Counter32: 0 IF-MIB::ifInUnknownProtos.2 = Counter32: 0 IF-MIB::ifInUnknownProtos.3 = Counter32: 0 IF-MIB::ifInUnknownProtos.78 = Counter32: 0 IF-MIB::ifInUnknownProtos.79 = Counter32: 0 IF-MIB::ifOutOctets.1 = Counter32: 106853 IF-MIB::ifOutOctets.2 = Counter32: 2855009817 IF-MIB::ifOutOctets.3 = Counter32: 3474494922 IF-MIB::ifOutOctets.78 = Counter32: 0 IF-MIB::ifOutOctets.79 = Counter32: 0 IF-MIB::ifOutUcastPkts.1 = Counter32: 1028 IF-MIB::ifOutUcastPkts.2 = Counter32: 1903603 IF-MIB::ifOutUcastPkts.3 = Counter32: 2459310 IF-MIB::ifOutUcastPkts.78 = Counter32: 0 IF-MIB::ifOutUcastPkts.79 = Counter32: 0 IF-MIB::ifOutNUcastPkts.1 = Counter32: 0 IF-MIB::ifOutNUcastPkts.2 = Counter32: 0 IF-MIB::ifOutNUcastPkts.3 = Counter32: 0 IF-MIB::ifOutNUcastPkts.78 = Counter32: 0 IF-MIB::ifOutNUcastPkts.79 = Counter32: 0 IF-MIB::ifOutDiscards.1 = Counter32: 0 IF-MIB::ifOutDiscards.2 = Counter32: 0 IF-MIB::ifOutDiscards.3 = Counter32: 0 IF-MIB::ifOutDiscards.78 = Counter32: 0 IF-MIB::ifOutDiscards.79 = Counter32: 0 IF-MIB::ifOutErrors.1 = Counter32: 0 IF-MIB::ifOutErrors.2 = Counter32: 0 IF-MIB::ifOutErrors.3 = Counter32: 0 IF-MIB::ifOutErrors.78 = Counter32: 0 IF-MIB::ifOutErrors.79 = Counter32: 0 IF-MIB::ifOutQLen.1 = Gauge32: 0 IF-MIB::ifOutQLen.2 = Gauge32: 0 IF-MIB::ifOutQLen.3 = Gauge32: 0 IF-MIB::ifOutQLen.78 = Gauge32: 0 IF-MIB::ifOutQLen.79 = Gauge32: 0 IF-MIB::ifSpecific.1 = OID: SNMPv2-SMI::zeroDotZero IF-MIB::ifSpecific.2 = OID: SNMPv2-SMI::zeroDotZero IF-MIB::ifSpecific.3 = OID: SNMPv2-SMI::zeroDotZero IF-MIB::ifSpecific.78 = OID: SNMPv2-SMI::zeroDotZero IF-MIB::ifSpecific.79 = OID: SNMPv2-SMI::zeroDotZero
Step 9: Run command service snmp walk remote-agent 10.0.0.1 v3 USER2TEST oid ifTable at DUT1 and check if output does not match the following regular expressions:
::ifDescr\.1 = STRING: "?lo"?Show output
snmpbulkwalk: Timeout (Sub-id not found: (top) -> ifTable)
Step 10: Run command service snmp table local-agent v3 USER2TEST oid ifTable at DUT0 and check if output matches the following regular expressions:
SNMP table:.*::ifTableShow output
SNMP table: IF-MIB::ifTable ifIndex ifDescr ifType ifMtu ifSpeed ifPhysAddress ifAdminStatus 1 lo softwareLoopback 65536 10000000 up 2 Red Hat, Inc Device 0001 ethernetCsmacd 1500 0 de:ad:be:ef:6c:10 up 3 Red Hat, Inc Device 0001 ethernetCsmacd 1500 0 de:ad:be:ef:6c:11 down 78 dum0 ethernetCsmacd 1500 0 fa:e4:e9:3a:cc:1b up 79 dum1 ethernetCsmacd 1500 0 2:ad:71:6f:68:d6 up SNMP table IF-MIB::ifTable, part 2 ifOperStatus ifLastChange ifInOctets ifInUcastPkts ifInNUcastPkts ifInDiscards ifInErrors up 0:0:00:00.00 112711 1054 0 0 0 up 0:0:00:00.00 908474839 100433 0 0 0 down 0:0:00:00.00 3474496004 2459167 0 13 0 up 0:0:00:00.00 0 0 0 0 0 up 0:0:00:00.00 0 0 0 0 0 SNMP table IF-MIB::ifTable, part 3 ifInUnknownProtos ifOutOctets ifOutUcastPkts ifOutNUcastPkts ifOutDiscards ifOutErrors ifOutQLen 0 112711 1054 0 0 0 0 0 2855010663 1903610 0 0 0 0 0 3474494922 2459310 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 SNMP table IF-MIB::ifTable, part 4 ifSpecific SNMPv2-SMI::zeroDotZero SNMPv2-SMI::zeroDotZero SNMPv2-SMI::zeroDotZero SNMPv2-SMI::zeroDotZero SNMPv2-SMI::zeroDotZero
Step 11: Run command service snmp table remote-agent 10.0.0.1 v3 USER2TEST oid ifTable at DUT1 and check if output does not match the following regular expressions:
SNMP table:.*::ifTableShow output
snmptable: Timeout (Sub-id not found: (top) -> ifTable)
Note
After configuring SNMP to listen on the ‘10.0.0.1‘ address, DUT1 requests should be allowed, but not local requests.
Step 12: Set the following configuration in DUT0:
del interfaces dummy dum1 address 127.0.0.1/24 del service snmp listen address 127.0.0.1 set service snmp listen address 10.0.0.1
Step 13: Run command service snmp walk local-agent v3 USER2TEST oid ifTable at DUT0 and check if output does not match the following regular expressions:
::ifDescr\.1 = STRING: "?lo"?Show output
snmpbulkwalk: Timeout (Sub-id not found: (top) -> ifTable)
Step 14: Run command service snmp walk remote-agent 10.0.0.1 v3 USER2TEST oid ifTable at DUT1 and check if output matches the following regular expressions:
::ifDescr\.1 = STRING: "?lo"?Show output
IF-MIB::ifIndex.1 = INTEGER: 1 IF-MIB::ifIndex.2 = INTEGER: 2 IF-MIB::ifIndex.3 = INTEGER: 3 IF-MIB::ifIndex.78 = INTEGER: 78 IF-MIB::ifDescr.1 = STRING: lo IF-MIB::ifDescr.2 = STRING: Red Hat, Inc Device 0001 IF-MIB::ifDescr.3 = STRING: Red Hat, Inc Device 0001 IF-MIB::ifDescr.78 = STRING: dum0 IF-MIB::ifType.1 = INTEGER: softwareLoopback(24) IF-MIB::ifType.2 = INTEGER: ethernetCsmacd(6) IF-MIB::ifType.3 = INTEGER: ethernetCsmacd(6) IF-MIB::ifType.78 = INTEGER: ethernetCsmacd(6) IF-MIB::ifMtu.1 = INTEGER: 65536 IF-MIB::ifMtu.2 = INTEGER: 1500 IF-MIB::ifMtu.3 = INTEGER: 1500 IF-MIB::ifMtu.78 = INTEGER: 1500 IF-MIB::ifSpeed.1 = Gauge32: 10000000 IF-MIB::ifSpeed.2 = Gauge32: 0 IF-MIB::ifSpeed.3 = Gauge32: 0 IF-MIB::ifSpeed.78 = Gauge32: 0 IF-MIB::ifPhysAddress.1 = STRING: IF-MIB::ifPhysAddress.2 = STRING: de:ad:be:ef:6c:10 IF-MIB::ifPhysAddress.3 = STRING: de:ad:be:ef:6c:11 IF-MIB::ifPhysAddress.78 = STRING: fa:e4:e9:3a:cc:1b IF-MIB::ifAdminStatus.1 = INTEGER: up(1) IF-MIB::ifAdminStatus.2 = INTEGER: up(1) IF-MIB::ifAdminStatus.3 = INTEGER: down(2) IF-MIB::ifAdminStatus.78 = INTEGER: up(1) IF-MIB::ifOperStatus.1 = INTEGER: up(1) IF-MIB::ifOperStatus.2 = INTEGER: up(1) IF-MIB::ifOperStatus.3 = INTEGER: down(2) IF-MIB::ifOperStatus.78 = INTEGER: up(1) IF-MIB::ifLastChange.1 = Timeticks: (0) 0:00:00.00 IF-MIB::ifLastChange.2 = Timeticks: (0) 0:00:00.00 IF-MIB::ifLastChange.3 = Timeticks: (0) 0:00:00.00 IF-MIB::ifLastChange.78 = Timeticks: (0) 0:00:00.00 IF-MIB::ifInOctets.1 = Counter32: 119848 IF-MIB::ifInOctets.2 = Counter32: 908475475 IF-MIB::ifInOctets.3 = Counter32: 3474496004 IF-MIB::ifInOctets.78 = Counter32: 0 IF-MIB::ifInUcastPkts.1 = Counter32: 1092 IF-MIB::ifInUcastPkts.2 = Counter32: 100439 IF-MIB::ifInUcastPkts.3 = Counter32: 2459167 IF-MIB::ifInUcastPkts.78 = Counter32: 0 IF-MIB::ifInNUcastPkts.1 = Counter32: 0 IF-MIB::ifInNUcastPkts.2 = Counter32: 0 IF-MIB::ifInNUcastPkts.3 = Counter32: 0 IF-MIB::ifInNUcastPkts.78 = Counter32: 0 IF-MIB::ifInDiscards.1 = Counter32: 0 IF-MIB::ifInDiscards.2 = Counter32: 0 IF-MIB::ifInDiscards.3 = Counter32: 13 IF-MIB::ifInDiscards.78 = Counter32: 0 IF-MIB::ifInErrors.1 = Counter32: 0 IF-MIB::ifInErrors.2 = Counter32: 0 IF-MIB::ifInErrors.3 = Counter32: 0 IF-MIB::ifInErrors.78 = Counter32: 0 IF-MIB::ifInUnknownProtos.1 = Counter32: 0 IF-MIB::ifInUnknownProtos.2 = Counter32: 0 IF-MIB::ifInUnknownProtos.3 = Counter32: 0 IF-MIB::ifInUnknownProtos.78 = Counter32: 0 IF-MIB::ifOutOctets.1 = Counter32: 119848 IF-MIB::ifOutOctets.2 = Counter32: 2855011467 IF-MIB::ifOutOctets.3 = Counter32: 3474494922 IF-MIB::ifOutOctets.78 = Counter32: 0 IF-MIB::ifOutUcastPkts.1 = Counter32: 1092 IF-MIB::ifOutUcastPkts.2 = Counter32: 1903616 IF-MIB::ifOutUcastPkts.3 = Counter32: 2459310 IF-MIB::ifOutUcastPkts.78 = Counter32: 0 IF-MIB::ifOutNUcastPkts.1 = Counter32: 0 IF-MIB::ifOutNUcastPkts.2 = Counter32: 0 IF-MIB::ifOutNUcastPkts.3 = Counter32: 0 IF-MIB::ifOutNUcastPkts.78 = Counter32: 0 IF-MIB::ifOutDiscards.1 = Counter32: 0 IF-MIB::ifOutDiscards.2 = Counter32: 0 IF-MIB::ifOutDiscards.3 = Counter32: 0 IF-MIB::ifOutDiscards.78 = Counter32: 0 IF-MIB::ifOutErrors.1 = Counter32: 0 IF-MIB::ifOutErrors.2 = Counter32: 0 IF-MIB::ifOutErrors.3 = Counter32: 0 IF-MIB::ifOutErrors.78 = Counter32: 0 IF-MIB::ifOutQLen.1 = Gauge32: 0 IF-MIB::ifOutQLen.2 = Gauge32: 0 IF-MIB::ifOutQLen.3 = Gauge32: 0 IF-MIB::ifOutQLen.78 = Gauge32: 0 IF-MIB::ifSpecific.1 = OID: SNMPv2-SMI::zeroDotZero IF-MIB::ifSpecific.2 = OID: SNMPv2-SMI::zeroDotZero IF-MIB::ifSpecific.3 = OID: SNMPv2-SMI::zeroDotZero IF-MIB::ifSpecific.78 = OID: SNMPv2-SMI::zeroDotZero
Step 15: Run command service snmp table local-agent v3 USER2TEST oid ifTable at DUT0 and check if output does not match the following regular expressions:
SNMP table:.*::ifTableShow output
snmptable: Timeout (Sub-id not found: (top) -> ifTable)
Step 16: Run command service snmp table remote-agent 10.0.0.1 v3 USER2TEST oid ifTable at DUT1 and check if output matches the following regular expressions:
SNMP table:.*::ifTableShow output
SNMP table: IF-MIB::ifTable ifIndex ifDescr ifType ifMtu ifSpeed ifPhysAddress ifAdminStatus 1 lo softwareLoopback 65536 10000000 up 2 Red Hat, Inc Device 0001 ethernetCsmacd 1500 0 de:ad:be:ef:6c:10 up 3 Red Hat, Inc Device 0001 ethernetCsmacd 1500 0 de:ad:be:ef:6c:11 down 78 dum0 ethernetCsmacd 1500 0 fa:e4:e9:3a:cc:1b up SNMP table IF-MIB::ifTable, part 2 ifOperStatus ifLastChange ifInOctets ifInUcastPkts ifInNUcastPkts ifInDiscards ifInErrors up 0:0:00:00.00 121120 1104 0 0 0 up 0:0:00:00.00 908477147 100451 0 0 0 down 0:0:00:00.00 3474496004 2459167 0 13 0 up 0:0:00:00.00 0 0 0 0 0 SNMP table IF-MIB::ifTable, part 3 ifInUnknownProtos ifOutOctets ifOutUcastPkts ifOutNUcastPkts ifOutDiscards ifOutErrors ifOutQLen 0 121120 1104 0 0 0 0 0 2855014722 1903628 0 0 0 0 0 3474494922 2459310 0 0 0 0 0 0 0 0 0 0 0 SNMP table IF-MIB::ifTable, part 4 ifSpecific SNMPv2-SMI::zeroDotZero SNMPv2-SMI::zeroDotZero SNMPv2-SMI::zeroDotZero SNMPv2-SMI::zeroDotZero
Note
After configuring SNMP to listen on the ‘20.0.0.1‘ address, neither local nor DUT1 requests should be allowed.
Step 17: Set the following configuration in DUT0:
del service snmp listen address 10.0.0.1 set service snmp listen address 20.0.0.1
Step 18: Run command service snmp walk local-agent v3 USER2TEST oid ifTable at DUT0 and check if output does not match the following regular expressions:
::ifDescr\.1 = STRING: "?lo"?Show output
snmpbulkwalk: Timeout (Sub-id not found: (top) -> ifTable)
Step 19: Run command service snmp walk remote-agent 10.0.0.1 v3 USER2TEST oid ifTable at DUT1 and check if output does not match the following regular expressions:
::ifDescr\.1 = STRING: "?lo"?Show output
snmpbulkwalk: Timeout (Sub-id not found: (top) -> ifTable)
Step 20: Run command service snmp table local-agent v3 USER2TEST oid ifTable at DUT0 and check if output does not match the following regular expressions:
SNMP table:.*::ifTableShow output
snmptable: Timeout (Sub-id not found: (top) -> ifTable)
Step 21: Run command service snmp table remote-agent 10.0.0.1 v3 USER2TEST oid ifTable at DUT1 and check if output does not match the following regular expressions:
SNMP table:.*::ifTableShow output
snmptable: Timeout (Sub-id not found: (top) -> ifTable)