Applicability
Table 6-1 compares the four different variations of IP Accounting and relates them to the fundamental questions that were discussed in Chapter 2.
| Criterion | IP Accounting (Layer 3) | IP Accounting ACL | IP Accounting MAC Address | IP Accounting Precedence |
|---|---|---|---|---|
| What to collect (data collection details)? | Total traffic (packets and bytes) per: IP source address IP destination address | Total traffic (packets and bytes) per failed ACL: IP source address IP destination address ACL identifier | Total traffic (packets and bytes) per: Source MAC address Destination MAC address | Total traffic (packets and bytes) per:Eight different IP precedence values |
| Where to collect? | Edge or core, LAN or WAN (any interface type) | Edge or core, LAN or WAN (any interface type) | Edge: LAN interface types only | Edge or core, LAN or WAN (any interface type) |
| How to configure? | CLI (scripts) | CLI (scripts) | CLI (scripts) | CLI (scripts) |
| How to collect? | Pull model: CLI (scripts) SNMP | Pull model: CLI (scripts) SNMP | Pull model: CLI (scripts) SNMP | Pull model: CLI (scripts) SNMP |
| How to identify the user? | IP address | IP address | MAC address | Not available |
| Use case example | Network monitoring and planning, user monitoring, usage-based billing | Security analysis | Security analysis, network monitoring and planning, user monitoring, usage-based billing, peering agreements | Network QoS monitoring and planning |
| Additional details | Only 32-bit SNMP countersTwo different databases provide a global "snapshot" of the network | Only 32-bit SNMP countersTwo different databases provide a global "snapshot" of the network | 32-bit and 64-bit SNMP counters | 32-bit and 64-bit SNMP counters |
