Package: colo
Version: 1.16-1
Severity: normal
When typing "net" in the colo shell, it does not receive an
IP address when connected to a Win2000 DHCP server. I traced
the network traffic during the DHCP phase:
frame source IP destination IP content
source MAC destination MAC
-----------------------------------------------------------------
1 0.0.0.0 255.255.255.255 DHCP Discover
cobalt's MAC ff:ff:ff:ff:ff:ff
-----------------------------------------------------------------
2 server's IP 255.255.255.255 DHCP Offer
server's MAC ff:ff:ff:ff:ff:ff
-----------------------------------------------------------------
3 0.0.0.0 server's IP DHCP Request
cobalt's MAC server's MAC
-----------------------------------------------------------------
This sequence is then repeated 10 times, as the Win2000 DHCP
server seems to ignore the DHCP Request. No IP address is assigned.
Tracing the DHCP packets from dhcp-client_2.0pl5 or from the
Windows DHCP client produces:
-----------------------------------------------------------------
1 0.0.0.0 255.255.255.255 DHCP Discover
cobalt's MAC ff:ff:ff:ff:ff:ff
-----------------------------------------------------------------
2 server's IP 255.255.255.255 DHCP Offer
server's MAC ff:ff:ff:ff:ff:ff
-----------------------------------------------------------------
3 0.0.0.0 255.255.255.255 DHCP Request
cobalt's MAC ff:ff:ff:ff:ff:ff
-----------------------------------------------------------------
4 server's IP 255.255.255.255 DHCP Ack
server's MAC ff:ff:ff:ff:ff:ff
-----------------------------------------------------------------
The IP address is successfully assigned.
RFC 2131 says in
chapter 3.1 client-server interaction - allocating a network address,
item 3
that the DHCP Request packet must be broadcasted (and to the same
broadcast address as the DHCP Discover packet).
With ISC dhcp3 server on Linux it happens to work nevertheless, however,
without broadcasting the DHCP Request.
Martin Köppe
-- System Information:
Debian Release: 3.1
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