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If the imRAD does not receive messages from clients, none of logs from the clients are recorded. | If the imRAD does not receive messages from clients, none of logs from the clients are recorded. | ||
| − | In such a case, you must make sure that the | + | In such a case, you must make sure that the requests from clients can be relaying to the imRAD. |
The layer 3 switch or router in the VLAN of clients relays the DHCP message to a DHCP server because clients broadcast the DHCP message. It is called "bootp-relay" or "DHCP helper". | The layer 3 switch or router in the VLAN of clients relays the DHCP message to a DHCP server because clients broadcast the DHCP message. It is called "bootp-relay" or "DHCP helper". | ||
Revision as of 15:59, 8 March 2021
DHCP > Log
Lease
The imRAD stores logs for assigned, released, expired, and declined IP addresses. These logs do not include reply for the "RENEW" and "REBIND" message but "DISCOVER-REQUEST-ACK(DHCPv4)" or "SOLICIT-REQUEST-REPLY(DHCPv6).
| Columns | Description |
|---|---|
| datetime | The date and time at which a log was recorded. |
| status | The status of IP address. |
| IP Address | The IP address that was assigned, released, expired, or declined. |
| MAC Address | The ethernet hardware address of the DHCP clients. |
| DHCP Server | The IP address of one of imRADs. |
| Hostname | DHCP client's hostname. |
| DHCP Pool | The name of the DHCP pool. |
| DUID IAID |
The DUID / IAID of the DHCPv6 client. |
PostDHCP
The imRAD records the result of processing the requests of DHCP clients as the PostDHCP to notify why a client was not allocated an IP address. By default, it only displays the results of failure(recommended) and you can change the setting using the CLI to save all results(failure and success). The failure means that a DHCP server dose not reply to DHCP clients because of the specific reason . You can make sure what the failure means in the DHCP failure messages.
If the imRAD does not receive messages from clients, none of logs from the clients are recorded. In such a case, you must make sure that the requests from clients can be relaying to the imRAD. The layer 3 switch or router in the VLAN of clients relays the DHCP message to a DHCP server because clients broadcast the DHCP message. It is called "bootp-relay" or "DHCP helper".
The imRAD keeps only today's postDHCP log, which means all logs are cleared at every 0 o'clock.
| Columns | Description |
|---|---|
| datetime | The date and time at which a log was recorded. |
| MAC Address | The ethernet hardware address of the DHCP clients. |
| Hostname | DHCP client's hostname. |
| DHCP Pool | The name of the DHCP pool for clients. If the name is "unknown", It means that server could not select a DHCP pool because of a reason . |
| DHCP Server | The imRAD IP address that records the log. |
| Helper IP Address | DHCP 클라이언트의 요청을 전송한 Helper(L3 스위치 혹은 라우터)의 IP 주소 (이 주소를 통해 클라이언트의 위치를 판단합니다.) |
| 요청 형식 | DHCP 요청 형식 |
| 요청 서버 주소 | DHCP 클라이언트가 요청 패킷 전송시 포함한 대상 서버 주소 |
| 요청 IP 주소 | DHCP 클라이언트가 요청 패킷 전송시 요청한 IP 주소 |
| 응답결과 | DHCP 처리 응답 결과를 참고하십시요. |
| VCID | Vendor Class Identifier |