So how would they expect to test something that doesn't actually function? I can always put in the command, but it wouldn't actually do anything.
Jeff On Sunday, May 6, 2012, Jason Boyers wrote: > I wouldn't necessarily assume that it won't be on the lab. It's listed in > the documentation. Just because it might not work as was expected doesn't > mean it can't be tested. > > Jason Boyers, CCIE #26024 (Wireless) > Blog: netboyers.wordpress.com > > > On Sun, May 6, 2012 at 9:23 PM, Jeff Rensink <[email protected]> wrote: > > Thanks for that Aaron. Now at least I know that I'm not crazy. > > I'll just have to assume Cisco won't throw something in the lab that would > require option 60 actually functioning on an IOS device. > > Jeff > > > On Sun, May 6, 2012 at 3:00 PM, Aaron Leonard <[email protected]> wrote: > > Jeff, > > The fact is that the IOS DHCP server does not support VCI functionality. > If you're interested in this feature, you can track CSCsq30317, which I > filed 4 years ago (but no activity on it yet.) > > Aaron > > ---- > > Related-file:: Added 2008-05-15 by aaron ::Release-note > > <B>Symptom:</B> > > Some DHCP servers can transmit different option 43 (Vendor Specific > Information) values, depending on the option 60 (Vendor Class Identifier) > values received from the clients. See RFC-2132, sec. 9.13. > > The IOS DHCP server cannot. As a result, a given IOS DHCP server > scope must return the same option 43 value to all clients that it > serves from that scope, regardless of those clients' VCIs. > > <B>Conditions:</B> > > Multiple client types in the same subnet, which desire different > option 43 values. > > <B>Workarounds:</B> > > 1. In the general DHCP pool for the subnet, configure the desired > option 43 value for the most prevalent client type. For each other > client, give it its own separate scope (using the specific client-id > for each client), with its preferred option 43 value. > > 2. Put the separate client types into separate VLANs/subnets, each > with a separate DHCP pool with its unique option 43 value. > > 3. With IOS 12.4(11)T or above, DHCP requests with different > option 60 values can be relayed to different DHCP servers. See > "Configuring DHCP Relay Class Support for Client Identification" > in the IOS documentation. > > <B>Further Problem Description:</B> > > Some DHCP client implementations may misbehave when receiving DHCP > option 43 values that they cannot understand. Customers encountering > such problematic implementations should contact technical support for > that software to learn about the availability of a fix. See, for example, > > http://support.microsoft.com/**kb/953761<http://support.microsoft.com/kb/953761>. > > ---- > > On 5/6/2012 9:00 AM, ccie_wireless-request@**onlinestudylist.com ( > ccie_wireless-request@**onlinestudylist.com) wrote: > > Send CCIE_Wireless mailing list submissions to > ccie_wireless@onlinestudylist.**com > > To subscribe or unsubscribe via the World Wide Web, visit > http://onlinestudylist.com/**cgi-bin/mailman/listinfo/ccie_** > wireless<http://onlinestudylist.com/cgi-bin/mailman/listinfo/ccie_wireless> > or, via email, send a message with subject or body 'help' to > ccie_wireless-request@**onlinestudylist.com > > You can reach the person managing the list at > ccie_wireless-owner@**onlinestudylist.com > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of CCIE_Wireless digest..." > > > Today's Topics: > > 1. DHCP option 60 on IOS help (Jeff Rensink) > 2. Re: DHCP option 60 on IOS help (Blake Krone) > 3. Re: DHCP option 60 on IOS help (Nawar Al Nomani) > > > ------------------------------**------------------------------**---------- > > Message: 1 > Date > >
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