Licensing Requirements and Limitations for Service Diagnosis

Other network elements are not required.

Service diagnosis is a basic feature of a switch and is not under license control.

All models of S2720, S5700, and S6700 series switches support service diagnosis.

For details about software mappings, visit Hardware Query Tool and search for the desired product model.

Service diagnosis affects system performance. Therefore, enable service diagnosis only when fault locating is required. After locating faults, immediately run the undo trace enable command to disable service diagnosis.
Users with different services have different attributes. Create diagnosis objects for different services based on different attributes.
- DHCP service: based on the MAC address.
- AAA and NAC services: based on the MAC address, IP address, user name, user VLAN ID, access mode, or interface number.
When the device functions as a DHCPv6 server, relay agent, or snooping device, note the following restrictions for performing a trace on a DHCPv6 client:
- A DUID can be configured for the DHCPv6 client based on the LL, LLT, or user-defined value. Currently, a trace can be performed only on the DHCPv6 client with the DUID generated based on the LL or LLT.
- When the DHCPv6 client has multiple network adapters installed, the MAC address in the DUID will be inconsistent with the MAC addresses of the network adapters. As a result, no trace can be performed on the DHCPv6 client. In this case, you need to view the DUID based on packets or view the DUID on the DHCPv6 client.