Monitoring Dual Stack IPv4/IPv6 Networks
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The document details the configuration and monitoring of dual-stack networks using SNMPv3, specifically with Zabbix and Cisco routers. It includes commands for testing SNMP setup, querying forwarded datagrams, and walking the interface table, along with statistics on datagram traffic. Additionally, it provides an overview of Zabbix features for network monitoring, including data collection scheduling and graphical visualization of network metrics.
Monitoring Dual Stack IPv4/IPv6 Networks
- 1. Monitoring Dual- Stack Networks Vance Shipley CTO, Wavenet
- 2. Cisco Router Configuration Setting up SNMPv3 authentication: snmp-server group zabbix v3 auth snmp-server user zabbix zabbix v3 auth md5 mypassphrase
- 3. Testing with Net-SNMP Configure authentication in a host specific configuration file (~/.snmp/hosts/hqr.conf): defVersion 3 defSecurityLevel authNoPriv defSecurityName zabbix defAuthType MD5 defAuthPassphrase mypassphrase
- 4. Testing with Net-SNMP Get the system name: $ snmpget hqr sysName.0 SNMPv2-MIB::sysName.0 = STRING: HQR
- 5. Internet Protocol MIB (IP-MIB) ipSystemStatsHCOutForwDatagrams OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of datagrams for which this entity was not their final IP destination and for which it was successful in finding a path to their final destination." http://tools.ietf.org/html/rfc4293#page-34
- 6. Internet Protocol MIB (IP-MIB) Get the number of forwarded datagrams: $ snmpget hqr ipSystemStatsHCOutForwDatagrams.ipv4 IP-MIB::ipSystemStatsHCOutForwDatagrams.ipv4 = Counter64: 19993419 $ snmpget hqr ipSystemStatsHCOutForwDatagrams.ipv6 IP-MIB::ipSystemStatsHCOutForwDatagrams.ipv6 = Counter64: 285
- 7. Interfaces MIB (IF-MIB) Walk the interface table: $ snmpwalk hqr ifDescr IF-MIB::ifDescr.1 = STRING: Embedded-Service-Engine0/0 IF-MIB::ifDescr.2 = STRING: GigabitEthernet0/0 IF-MIB::ifDescr.3 = STRING: GigabitEthernet0/1 IF-MIB::ifDescr.4 = STRING: Serial0/0/0 IF-MIB::ifDescr.5 = STRING: Null0 http://tools.ietf.org/html/rfc2863#page-30
- 8. Internet Protocol MIB (IP-MIB) ipIfStatsHCInForwDatagrams OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of input datagrams for which this entity was not their final IP destination and for which this entity attempted to find a route to forward them to that final destination.” http://tools.ietf.org/html/rfc4293#page-47
- 9. Internet Protocol MIB (IP-MIB) Query received IP datagrams on interface GigabitEthernet0/0 (index 2): $ snmpget hqr ipIfStatsHCInReceives.ipv4.2 IP-MIB::ipIfStatsHCInReceives.ipv4.2 = Counter64: 106157 $ snmpget hqr ipIfStatsHCInReceives.ipv6.2 IP-MIB::ipIfStatsHCInReceives.ipv6.2 = Counter64: 1040
- 10. Network Monitoring with Zabbix ✓ Open Source ✓ Graphical User Interface ✓ SNMP, IPMI, JMX Agents ✓ Notification Triggers ✓ Historical Database ✓ Graphing
- 11. Zabbix: Latest Data View ✓ Items gather data from a host for a particular metric ✓ Each item has it’s own schedule for collection (i.e. every 60s, 24h) ✓ Quick Graphing
- 12. Zabbix: Configure SNMP Item ✓ Net-SNMP Integration ✓ Graphical Configuration ✓ Flexible Intervals ✓ Store As-Is or Delta ✓ History Storage Period ✓ Trend Storage Period ✓ Templates & Cloning
- 13. Zabbix: Create Custom Graph
- 14. IP Datagrams Forwarded (Hour) Average of IP datagrams forwarded through router: IPv4: 80% IPv6: 20%
- 15. IP Datagrams Received (Hour) Average of IP datagrams received by router: IPv4: 66% IPv6: 34%
- 16. IP Bytes Received (Hour) Average of bytes received in IP datagrams: IPv4: 49% IPv6: 51%
- 17. IP Datagrams Sent/Received (Hour)
- 18. IP Datagrams Sent/Received (Week)