03-31-2009 01:18 PM - edited 03-06-2019 04:55 AM
hi anybody got a idea what i must change
I have a 3560-24 on my location with a local dhcp scope in it, and my PXE server is placed in my campus
in between i have a mpls net (100mbit)
i can see my router/switch is offering a dhcp adresse but my client wouldn't accept it
but when i shut down my local scope and move it to a windows another dhcp server in campus (ip helper on the vlan) it works, but
i will have the ip control on the routerm becourse i would like to use my blade enviromet
my user vlan is a simple setup
interface Vlan10
description *** LAN Data ***
ip address 10.x.x.1 255.255.255.0
ip helper-address 10.y.y.y (campus ip)
my wan vlan interface Vlan860
description *** ISP MPLS ***
ip address 192.168.64.26 255.255.255.252
no ip redirects
ip directed-broadcast
end
i have tried to change ip forward protocol udp bootpc ...
allso have I tried in the dhcp scope
tried to use option 60/67/68/43
ip dhcp pool DHCP-Data
network 10.x.x.0 255.255.255.0
default-router 10.x.x.1
domain-name mydomain.dk
dns-server dns1 dns2
option 66 ip 10.y.y.y
option 43 hex 0104.0000.0000.ff
option 60 ascii "PXEClient"
the switch is running
c3560-ipservicesk9-mz.122-44.SE1.bin
does anybody have a idea
thanks in advance
03-31-2009 08:57 PM
Suggest you to do a packet capture on both working and not-working case to see what the difference is.
Make sure you have those options setup correctly.
05-05-2009 02:30 PM
It sounds like we have a similar scenario. Campus based DHCP and a centralized PXE server. We use Microsoft DHCP servers, but the PXE server is the old 3Com application (don't ask why). First I just added the additional ip helper-address for the PXE server, but I never see the DHCP OFFER from PXE. In addition I noticed that when PXE booting, the client would not DHCP, though packet captures show a valid DHCP OFFER. I finally tried adding just option 66 (PXE Server name) and 67 (the name of the bootfile). This worked for one site, will be trying another site soon. I did not need to set option 60, in fact I removed it.
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