Hi all,
I am tasked to set up SCCM with WDS for OS deployment for our company and I am kind stuck here. For BIOS PC to run PXE boot it's all nice and smooth. But for UEFI PC to PXE boot only works the very first time it request DHCP and PXE. After the first it will not able to PXE boot any more.
Here is the setup:
Catalyst 3650 - DHCP service runs on this device
interface Vlan5
ip address 10.12.20.240 255.255.255.0
ip dhcp pool Vanc_Data
network 10.12.20.0 255.255.255.0
dns-server 10.12.20.231 10.13.33.6 10.3.11.48 10.3.11.110
netbios-name-server 10.3.11.48 10.3.11.110
netbios-node-type h-node
domain-name broadleaflogistics.com
default-router 10.12.20.254
option 252 ascii "http://vscwwpad.logistics.com/wpad.dat"
option 66 ip 10.12.20.234
option 67 ascii "\smsboot\x64\wdsnbp.com"
lease 4
WDS (Managed by SCCM) IP 10.12.20.234 on VLAN5
Client connect to interface VLAN5
I use wireshark did a DHCP track it shows if it's very first time the device request for DHCP and PXE it gets 2 offers. Once from DHCP and one from WDS. The Client then picks up the IP from CISCO DHCP and receiving boot file from WDS.
2 0.002622 10.12.20.240 255.255.255.255 DHCP 395 DHCP Offer - Transaction ID 0xf679787e
3 0.305481 10.12.20.234 255.255.255.255 DHCP 1066 DHCP Offer - Transaction ID 0xf679787e
If I attempt the PXE boot the 2nd time it receives 3 offers
26 616.304568 10.12.20.240 255.255.255.255 DHCP 395 DHCP Offer - Transaction ID 0xf6797888
27 616.620900 10.12.20.234 255.255.255.255 DHCP 1066 DHCP Offer - Transaction ID 0xf6797888
28 616.631694 10.12.20.234 255.255.255.255 DHCP 322 DHCP Offer - Transaction ID 0xf6797888
And the Client PC seems to be taking WDS's offer and trying to get IP from it.
30 619.829942 10.1.20.234 255.255.255.255 DHCP 342 DHCP ACK - Transaction ID 0xf6797888
I keeps on digging on Google regarding to this. A lot post is mentioning IP helper-address command will forward the request and solve this issue. What do they actually mean? Is it configuring VLAN 5 IP Helper-address to WDS or IP Helper-address to DHCP? Also why it worked for the first time only?
Could any one help me answer these questions?
Thank you,
Henry
