DHCP Address Allocation Using Option 82

Hi GS

Im testing DHCP Address Allocation Using Option 82 and unfortunately
router does not want to assigne IP address from the pool based on the
Option 82. To all packets option 82 is inserted by SW2, SW 4 has clear
config.
With both DHCP class configuration server always assigned IP based on
the POOL, not pool R6 that should be assigned to client.

My question, based on my inputs what is wrong, I guess tha HEX value is
wrong configured.

Do you have any thoughts?

I have following topology

R6 --- gi1/0/6 SW2 --- SW4 ---fa0/4---R4

R4 is DHCP server
R6 is a client with ip address dhcp

R4 config

ip dhcp relay information trust-all
ip dhcp excluded-address 155.1.146.1 155.1.146.10
!
ip dhcp pool R6
    class CLASS
       address range 155.1.146.106 155.1.146.106
!
ip dhcp pool POOL
    network 155.1.146.0 255.255.255.0
!
ip dhcp class CLASS
    relay agent information
       relay-information hex 0107524f55544552360209010753574954434832
!

interface FastEthernet0/0
  mac-address 0000.4444.4444
  ip address 204.12.1.4 255.255.255.0

This is what R4 receives

07E3CC40: 00000000 00000000 00000000 00000000 ................
07E3CC50: 00000000 00000000 00000000 00000000 ................
07E3CC60: 00000000 00000000 00000000 00000000 ................
07E3CC70: 00000000 00000000 00000000 00000000 ................
07E3CC80: 63825363 35010339 0204803D 1F006369 c.Sc5..9...=..ci
07E3CC90: 73636F2D 30303030 2E363636 362E3636 sco-0000.6666.66
07E3CCA0: 36362D46 61302F30 2E313436 36049B01 66-Fa0/0.1466...
07E3CCB0: 92043204 9B019210 33040001 51800C02 ..2.....3...Q...
07E3CCC0: 52363708 01060F2C 0321962B 52160109 R67....,.!.+R...
07E3CCD0: 0107524F 55544552 36020901 07535749 ..ROUTER6....SWI
07E3CCE0: 54434832 FF TCH2.

with second option Ive configured class like below

ip dhcp class CLASS
    relay agent information
       relay-information hex
63825363350103390204803d1f00636973636f2d303030302e363636362e363636362d4661302f302e31343636049b01920432049b0192103304000151800c025236370801060f2c0321962b521601090107524f55544552360209010753574954434832

SW2

ip dhcp snooping vlan 146
ip dhcp snooping information option format remote-id string SWITCH2
ip dhcp snooping

interface GigabitEthernet1/0/6
  switchport trunk encapsulation dot1q
  switchport trunk allowed vlan 67,146
  switchport mode trunk
  ip dhcp snooping vlan 146 information option format-type circuit-id
string ROUTER6

interface GigabitEthernet1/0/21
  descr TO-SW4
  switchport mode dynamic desirable
  ip dhcp snooping trust

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Received on Fri May 08 2009 - 11:58:12 ART