EditDiscussionPage history

Difference between revisions of "DHCP Log"

 
(8 intermediate revisions by the same user not shown)
Line 3: Line 3:
 
==== Lease ====
 
==== Lease ====
 
The imRAD stores logs for [[DHCP Terminology(assignment, lease, availability, and so on) | assigned, released, expired, and declined]] IP addresses.
 
The imRAD stores logs for [[DHCP Terminology(assignment, lease, availability, and so on) | assigned, released, expired, and declined]] IP addresses.
−
These logs do not include "RENEW" and "REBIN" but "DISCOVER-REQUEST-ACK(DHCPv4)" or "SOLICIT-REQUEST-REPLY(DHCPv6).
+
These logs do not include reply for the "RENEW" and "REBIND" message but "DISCOVER-REQUEST-ACK(DHCPv4)" or "SOLICIT-REQUEST-REPLY(DHCPv6).
  
 
{| class="wikitable"
 
{| class="wikitable"
 
! Columns !! Description
 
! Columns !! Description
 
|-
 
|-
−
| datetime|| The date and time at which a log was recorded.
+
| Lease Obtained || The date and time at which a client obtained the lease.
 +
|-
 +
| Lease Renewal|| The last date and time at which a client extends its lease.
 
|-
 
|-
 
| status || The status of IP address.
 
| status || The status of IP address.
Line 15: Line 17:
 
|-
 
|-
 
| [[MAC Address]] || The ethernet hardware address of the DHCP clients.
 
| [[MAC Address]] || The ethernet hardware address of the DHCP clients.
 +
|-
 +
| DUID<br>IAID || The [[DUID and IAID | DUID / IAID ]] of the DHCPv6 client.
 
|-
 
|-
 
| DHCP Server || The IP address of one of imRADs.
 
| DHCP Server || The IP address of one of imRADs.
Line 20: Line 24:
 
| Hostname || DHCP client's hostname.
 
| Hostname || DHCP client's hostname.
 
|-
 
|-
−
| Pool name || The name of the DHCP pool.
+
| DHCP Pool Name || The name of the DHCP pool.
 +
|-
 +
| Lease Finished || The last date and time at which a client relinquished its address.
 +
|-
 +
| Finish-Cause || It indicates why the lease finished and is either [[DHCP Terminology(assignment, lease, availability, and so on) | released, expired, or declined]].
 
|-
 
|-
−
| DUID<br>IAID || The [[DUID]]/[[IAID]] of the DHCPv6 client.
+
| Total Duration || It indicates how log a client remains its lease.
 +
|-
 +
| Repeat || The total number of DHCP request from a client.
 
|-
 
|-
 
|}
 
|}
  
−
==== DHCP 처리 ====
+
==== PostDHCP ====
−
DHCP 클라이언트의 요청에 서버가 응답하지 못한 경우 그 원인을 제공하기 위한 이력입니다.<br>
+
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).
−
본 시슽템을 운영하는 과정에서 특정 클라이언트에 IP 주소 할당이 안되는 경우 이 이력을 통해 그 원인을 분석 할 수 있습니다.<br>
+
The failure means that a DHCP server dose not reply to DHCP clients because of the specific [[DHCP failure messages | reason ]]. You can make sure what the failure means in the [[DHCP failure messages]].
−
단, DHCP 처리 이력이 생성되지 않으면 본 시스템에 어떠한 클라이언트의 요청도 수신되지 않는 경우므로 라우터 혹은 L3 스위치 장비의 DHCP Helper 혹은 bootp-relay 설정을 확인하세요.<br>
+
 
−
이 이력은 당일만 생성(자정 기준)되며 지난 이력은 자동으로 삭제됩니다.
+
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", "relay-agent", or "DHCP helper".
 +
 +
The imRAD keeps only today's postDHCP log, which means all logs are cleared at every 0 o'clock.
  
 
{| class="wikitable"
 
{| class="wikitable"
−
! 항목 !! 설명
+
! Columns !! Description
 
|-
 
|-
−
| 처리 시간 || 요청이 발생되어 기록된 시간
+
| Start Datetime|| The initial date and time at which a log was recorded.
 
|-
 
|-
−
| MAC 주소 || DHCP 클라이언트의 [[MAC 주소]]
+
| Datetime || The latest date and time at which a log was recorded.<br>
 +
If the same client fails for the same reason, it does not insert a new log but updates the "Repeat" count and the Datetime.
 +
|-
 +
| [[MAC Address]] || The ethernet hardware address of the DHCP clients.
 +
|-
 +
| Hostname || DHCP client's hostname.
 
|-
 
|-
−
| 호스트 이름 || DHCP 클라이언트의 이름(컴퓨터 이름)
+
| DHCP Pool || The name of the DHCP pool for clients.<br>If the name is "unknown", It means that server could not select a DHCP pool because of a [[DHCP failure messages | reason ]].
 
|-
 
|-
−
| DHCP 범위 이름 || DHCP 클라이언트가 IP 주소를 요청한 범위
+
| DHCP Server || The imRAD IP address that records the log.
 
|-
 
|-
−
| 처리 시스템 || 요청을 처리한 imRAD 시스템 IP 주소
+
| Helper Address || The IP address of a DHCP helper which relays the DHCP clients messages to the imRAD DHCP server.<br>
 +
The DHCP server selects an available IP address in a DHCP pool by the IP address of the DHCP helper.
 
|-
 
|-
−
| Helper IP 주소 || DHCP 클라이언트의 요청을 전송한 Helper(L3 스위치 혹은 라우터)의 IP 주소<br>
+
| Request || One of the DHCP messages.
−
(이 주소를 통해 클라이언트의 위치를 판단합니다.)
 
 
|-
 
|-
−
| 요청 형식 || DHCP 요청 형식
+
| Request Server Address || The request server IP address in the DHCP client message.<br>If the address is not the same as an imRAD's address, the system may not ack or reply to the client.
 
|-
 
|-
−
| 요청 서버 주소 || DHCP 클라이언트가 요청 패킷 전송시 포함한 대상 서버 주소
+
| Request Address || An IP address requesting by a client.
 
|-
 
|-
−
| 요청 IP 주소 || DHCP 클라이언트가 요청 패킷 전송시 요청한 IP 주소
+
| Reply || One of the [[DHCP failure messages]].
 
|-
 
|-
−
| 응답결과 || [[DHCP 처리 응답 결과]]를 참고하십시요.
+
| [[VCID]] || Vendor Class Identifier
 
|-
 
|-
 
|}
 
|}

Latest revision as of 16:09, 29 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
Lease Obtained The date and time at which a client obtained the lease.
Lease Renewal The last date and time at which a client extends its lease.
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.
DUID
IAID		 The DUID / IAID of the DHCPv6 client.
DHCP Server The IP address of one of imRADs.
Hostname DHCP client's hostname.
DHCP Pool Name The name of the DHCP pool.
Lease Finished The last date and time at which a client relinquished its address.
Finish-Cause It indicates why the lease finished and is either released, expired, or declined.
Total Duration It indicates how log a client remains its lease.
Repeat The total number of DHCP request from a 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", "relay-agent", or "DHCP helper".

The imRAD keeps only today's postDHCP log, which means all logs are cleared at every 0 o'clock.

Columns Description
Start Datetime The initial date and time at which a log was recorded.
Datetime The latest date and time at which a log was recorded.

If the same client fails for the same reason, it does not insert a new log but updates the "Repeat" count and the Datetime.

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 Address The IP address of a DHCP helper which relays the DHCP clients messages to the imRAD DHCP server.

The DHCP server selects an available IP address in a DHCP pool by the IP address of the DHCP helper.

Request One of the DHCP messages.
Request Server Address The request server IP address in the DHCP client message.
If the address is not the same as an imRAD's address, the system may not ack or reply to the client.
Request Address An IP address requesting by a client.
Reply One of the DHCP failure messages.
VCID Vendor Class Identifier