Cisco-Linksys doesn't like ISC-DHCP3 (3.1.1)

[Will Eagleton]

You may want to look at the actual packets to see what it is asking for and whether it is in the reply. That could be a reason to not accept an address offer. The root cause could very well be something quite different. 


Sten, thank you for the input... I hope I am not asking a 'stupid' question, but what else would the root cause be? There is no wiring negotiation issue etc, so I'm at a loss to know what else there may be. Most routers provide one form or another, client-identifier, so that is the most obvious things I see.

I have looked at the Discover and Offer messages, and am trying to figure out why the Linksys is not accepting the lease. We have this problem with maybe 50 or so customers at this point, so we give them statics which we'd like to avoid (several, mostly obvious reasons)

07:58:46.298122 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 328) 0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from 58:6d:8f:79:8c:9d (oui Unknown), length 300, xid 0x588e3b7e, secs 43, Flags [Broadcast] (0x8000)
	  Client-Ethernet-Address 58:6d:8f:79:8c:9d (oui Unknown)
	  Vendor-rfc1048 Extensions
	    Magic Cookie 0x63825363
	    DHCP-Message Option 53, length 1: Discover
	    Hostname Option 12, length 19: "Fogelmania_unit1409"
	    Parameter-Request Option 55, length 4: 
	      Subnet-Mask, Default-Gateway, Domain-Name, Domain-Name-Server
07:58:46.298590 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 351) x.199.21.84.web-pass.com.bootps > 255.255.255.255.bootpc: [udp sum ok] BOOTP/DHCP, Reply, length 323, xid 0x588e3b7e, secs 43, Flags [Broadcast] (0x8000)
	  Your-IP x.199.21.84.web-pass.com
	  Server-IP x.199.21.84.web-pass.com
	  Client-Ethernet-Address 58:6d:8f:79:8c:9d (oui Unknown)
	  Vendor-rfc1048 Extensions
	    Magic Cookie 0x63825363
	    DHCP-Message Option 53, length 1: Offer
	    Server-ID Option 54, length 4: x.edited-out.edited-out.edited-out.web-pass.com
	    Lease-Time Option 51, length 4: 28800
	    Subnet-Mask Option 1, length 4: 255.255.255.192
	    Default-Gateway Option 3, length 4: x.199.21.84.web-pass.com
	    Domain-Name Option 15, length 12: "web-pass.com"
	    Domain-Name-Server Option 6, length 12: ns6.web-pass.com,x.152.14.204.web-pass.com,ns3.web-pass.com

At this point I will likely purchase one, if it isn't the missing client-identifier then perhaps the reverse-DNS stuff is confusing the client(?)