请教一个DHCP relayd的问题

Question

拓扑图和配置如图所示。我在R1上debug ip dhcp server packet和event,能看到这样一行：
DHCPD: there is no pool for 12.12.12.1

请问这是为什么？

Answer 1

忘了一点，R3的接口配置了ip address dhcp

Answer 2

DHCPD: there is no pool for 12.12.12.1

没有别的提示了吗？

Answer 3

还有其他信息，我只粘帖上来了这个我看着最别扭的，明天下午我给弄全了。另外，虽然有这个提示，但是R3是能够分配到地址的，如果不debug，看上去就一切正常了。

Answer 4

我来反馈一下详细的信息：
R1的配置：
ip dhcp excluded-address 23.23.23.2
!
ip dhcp pool test
   network 23.23.23.0 255.255.255.0
   default-router 23.23.23.2
!
no ip domain lookup
!
interface FastEthernet0/0
ip address 12.12.12.1 255.255.255.0
speed 100
full-duplex
!
ip route 0.0.0.0 0.0.0.0 12.12.12.2
!

R2的配置：
interface FastEthernet0/0
ip address 12.12.12.2 255.255.255.0
speed 100
full-duplex
!
interface FastEthernet0/1
ip address 23.23.23.2 255.255.255.0
ip helper-address 12.12.12.1
speed 100
full-duplex

R3的配置：
interface FastEthernet0/1
ip address dhcp
speed 100
full-duplex

现象是分配地址过程中一切正常，R1上debug ip dhcp server packet & event，在我shutdown R3接口时，R1上输出信息如下：
*Mar  1 00:08:18.979: DHCPD: DHCPRELEASE message received from client 0063.6973.636f.2d63.3030.362e.3130.3238.2e30.3030.312d.4661.302f.31 (23.23.23.4).
*Mar  1 00:08:18.983: DHCPD: Finding a relay for client 0063.6973.636f.2d63.3030.362e.3130.3238.2e30.3030.312d.4661.302f.31 on interface FastEthernet0/0.
*Mar  1 00:08:18.987: DHCPD: Seeing if there is an internally specified pool class:
*Mar  1 00:08:18.987:   DHCPD: htype 1 chaddr c006.1028.0001
*Mar  1 00:08:18.987:   DHCPD: remote id 020a00000c0c0c0100000000
*Mar  1 00:08:18.991:   DHCPD: circuit id 00000000
*Mar  1 00:08:18.991: DHCPD: there is no pool for 12.12.12.1.

最后一行我不明白是这么回事儿，谁遇到过？