From: Larry Letterman (lletterm@cisco.com)
Date: Sun Nov 03 2002 - 00:14:07 GMT-3
Post the config of the router/switch...
it sounds like an interface config issue...
jeff szeto wrote:
>Hi,
>
>Yes, actually only clients one of the vlans can't get ip from the dhcp, the
>other vlans are normal.
>All vlans use the same helper address, thus the same dhcp server.
>
>What is the possible reason?
>
>Thank you.
>
>Jeff
>----- Original Message -----
>From: "Larry Letterman" <lletterm@cisco.com>
>To: "jeff szeto" <jytszeto@hotmail.com>
>Cc: <ccielab@groupstudy.com>
>Sent: Sunday, November 03, 2002 2:43 AM
>Subject: Re: dhcp error
>
>
>>do you have the dhcp helper address's in each vlan interface configured?
>>do you have the router config done correctly?
>>All I see in the route table are connected interfaces.....
>>
>>Larry
>>
>>jeff szeto wrote:
>>
>>>Hi Group,
>>>
>>>I have a 6500 with different vlans. The dhcp client can't get ip address.
>>>
>When
>
>>>I do a debug in the switch, I see a error showing no route to the dhcp
>>>
>server.
>
>>>But this server is connected to the switch and I can ping it from the
>>>
>switch.
>
>>>The following is the log and the route table.
>>>Could you help to resolve this problem?
>>>
>>>Thank you.
>>>
>>>Jeff
>>>
>>>Router#debug ip dhcp server packet
>>>
>>>*Jan 1 08:57:27.463 HKG: DHCPD: setting giaddr to 10.2.25.252.
>>>*Jan 1 08:57:27.463 HKG: DHCPD: BOOTREQUEST from 0100.065b.37ae.b4
>>>
>forwarded
>
>>>to
>>>10.2.20.170.
>>>*Jan 1 08:57:27.463 HKG: DHCPD: BOOTREQUEST not forwarded. No route to
>>>
>helper
>
>>>a
>>>ddr 10.2.20.170
>>>*Jan 1 08:57:27.463 HKG: DHCPD: BOOTREQUEST from 0100.065b.37ae.b4
>>>
>forwarded
>
>>>to
>>>10.2.20.3.
>>>*Jan 1 08:57:27.463 HKG: DHCPD: BOOTREQUEST not forwarded. No route to
>>>
>helper
>
>>>a
>>>ddr 10.2.20.3
>>>*Jan 1 08:57:27.567 HKG: DHCPD: forwarding BOOTREPLY to client
>>>0006.5b37.aeb4.
>>>*Jan 1 08:57:27.567 HKG: DHCPD: creating ARP entry (10.2.25.15,
>>>0006.5b37.aeb4)
>>>.
>>>*Jan 1 08:57:27.567 HKG: DHCPD: unicasting BOOTREPLY to client
>>>
>0006.5b37.aeb4
>
>>>(
>>>10.2.25.15).
>>>*Jan 1 08:57:27.567 HKG: DHCPD: setting giaddr to 10.2.25.252.
>>>*Jan 1 08:57:27.567 HKG: DHCPD: BOOTREQUEST from 0100.065b.37ae.b4
>>>
>forwarded
>
>>>to
>>>10.2.20.170.
>>>*Jan 1 08:57:27.567 HKG: DHCPD: BOOTREQUEST not forwarded. No route to
>>>
>helper
>
>>>a
>>>ddr 10.2.20.170
>>>*Jan 1 08:57:27.571 HKG: DHCPD: BOOTREQUEST from 0100.065b.37ae.b4
>>>
>forwarded
>
>>>to
>>>10.2.20.3.
>>>*Jan 1 08:57:27.571 HKG: DHCPD: BOOTREQUEST not forwarded. No route to
>>>
>helper
>
>>>a
>>>ddr 10.2.20.3
>>>*Jan 1 08:57:27.675 HKG: DHCPD: forwarding BOOTREPLY to client
>>>0006.5b37.aeb4.
>>>*Jan 1 08:57:27.679 HKG: DHCPD: creating ARP entry (10.2.25.15,
>>>0006.5b37.aeb4)
>>>.
>>>*Jan 1 08:57:27.679 HKG: DHCPD: unicasting BOOTREPLY to client
>>>
>0006.5b37.aeb4
>
>>>(
>>>10.2.25.15).
>>>
>>>Router#sh ip ro
>>>C 10.2.19.0/24 is directly connected, Vlan19
>>>C 10.2.20.0/24 is directly connected, Vlan20
>>>C 10.2.21.0/24 is directly connected, Vlan21
>>>C 10.2.22.0/24 is directly connected, Vlan22
>>>C 10.2.23.0/24 is directly connected, Vlan23
>>>C 10.2.24.0/24 is directly connected, Vlan24
>>>C 10.2.25.0/24 is directly connected, Vlan25
>>>C 10.2.26.0/24 is directly connected, Vlan26
>>>C 10.2.27.0/24 is directly connected, Vlan27
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