From: John Tafasi (johntafasi@yahoo.com)
Date: Mon Nov 24 2003 - 22:49:48 GMT-3
Can some one try using the command "ip dhcp relay information option" on the
dhcp relay agent see if this will work. I could not use this command on my
dhcp relay agent because it is running an old ios.
Thanks
John
----- Original Message -----
From: "John Tafasi" <johntafasi@yahoo.com>
To: "ccielab" <ccielab@groupstudy.com>
Sent: Monday, November 24, 2003 6:26 PM
Subject: DHCP Manual Binding Configuration challenge
> Hi group,
>
> I have a problem assigning bb2 (router acting as dhcp client) the ip
address
> 150.50.4.12 which has been manually mapped to bb2 mac address on the dhcp
> server (r7).
>
> The r8 is the dhcp relay agent residing between r7 and bb2.
> r7 and r8 have the serial connection between them.
> r8 and bb2 have ethernet connection between them.
>
>
> I have included the configuration for all routers below. The problem is
that
> the dhcp server (r7) will assign the client any ip address other than
> 150.50.4.12, which is not the desired result. The desired result is that
bb2
> should be assigned the ip address 150.50.4.12 by the dhcp server.
>
> Can someone see what the problem is?
>
> r7#show run
> Building configuration...
>
> hostname r7
> !
> ip dhcp smart-relay
> ip dhcp relay information option
> !
> ip dhcp pool bb2
> host 150.50.4.12 255.255.255.0
> domain-name cisco.com
> client-name bb2
> !
> ip dhcp pool 150.50.4
> network 150.50.4.0 255.255.255.0
> !
> !
> !
> !
> interface Loopback0
> ip address 200.0.0.7 255.255.255.255
> !
> interface Serial1/0
> ip address 150.50.5.68 255.255.255.224
> ip tcp header-compression
> no fair-queue
> clockrate 64000
> !
> !
> !
> end
>
> r7#
>
> ---------------
> r8#show run
> Building configuration...
>
> !
> hostname r8
> !
> !
> interface Loopback0
> ip address 200.0.0.8 255.255.255.255
> no ip directed-broadcast
> !
> interface Ethernet0
> ip address 150.50.4.8 255.255.255.0
> ip helper-address 200.0.0.7
> no ip directed-broadcast
> media-type 10BaseT
> ip rsvp bandwidth 7500 7500
> !
> !
> interface Serial0
> ip address 150.50.5.69 255.255.255.224
> no ip directed-broadcast
> ip tcp header-compression
> no ip mroute-cache
> !
> !
> !
> ip classless
> !
> end
>
> r8#
>
> -----------------
> bb2(config)#int e0
> bb2(config-if)#
> bb2(config-if)#no ip address
> bb2(config-if)#ip add
> 4w5d: IP: s=150.50.4.22 (local), d=150.50.5.68, len 604, unroutable
> 4w5d: UDP src=68, dst=67
> 4w5d: IP: s=150.50.4.22 (local), d=150.50.5.68 (Ethernet0), len 604,
sending
> 4w5d: UDP src=68, dst=67
> 4w5d: IP: s=150.50.4.22 (local), d=150.50.5.68 (Ethernet0), len 604,
> encapsulation failed
> 4w5d: UDP src=68, dst=67
> 4w5d: IP: s=150.50.4.22 (local), d=150.50.5.68 (Ethernet0), len 604,
sending
> 4w5d: UDP src=68, dst=67
> bb2(config-if)#ip address dhcp
> bb2(config-if)#
> 4w5d: IP: s=0.0.0.0 (local), d=255.255.255.255 (Ethernet0), len 604,
sending
> broad/multicast
> 4w5d: UDP src=68, dst=67
> bb2(config-if)#Interface Ethernet0 assigned DHCP address 150.50.4.23, mask
> 255.255.255.0
>
> 4w5d: IP: s=150.50.5.68 (Ethernet0), d=255.255.255.255, len 328, rcvd 2
> 4w5d: UDP src=67, dst=68
> 4w5d: IP: s=0.0.0.0 (local), d=255.255.255.255 (Ethernet0), len 604,
sending
> broad/multicast
> 4w5d: UDP src=68, dst=67
> 4w5d: IP: s=150.50.5.68 (Ethernet0), d=255.255.255.255, len 328, rcvd 2
> 4w5d: UDP src=67, dst=68
> bb2(config-if)#
>
>
>
> bb2#show ip inter brief
> Interface IP-Address OK? Method Status
> Protocol
> Ethernet0 150.50.4.23 YES DHCP up
> up
> Serial0 unassigned YES NVRAM administratively
down
> down
> Serial1 unassigned YES NVRAM administratively
down
> down
> bb2#
>
>
>
>
>
> ----------------------------
>
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