I suppose its possible to have a L3 issue, but if the L3 card is setup for the Vlan interfaces and routing properly, and the appropriate helpers are in place on the L3 interface, the 4006 should work. Usually this issue is a result of the STP 50 second forward time on the L2 port.
Larry Letterman Network Engineer Cisco Systems ----- Original Message ----- From: "Waters, Kristina" To: Sent: Friday, February 07, 2003 11:58 AM Subject: RE: Catalyst 4000 and DHCP [7:62632] > I am curious as to whether anything else got upgraded besides the new > switch. I got the impression that this wasn't a problem before the upgrade, > in which case portfast could definitely be the culprit. However, you could > also see this error if DNS is improperly configured in a win2k domain. Also, > I'm not sure about this, but if the 4006 has a sup3 or sup4, could the > problem be related to layer 3? > > Kris > > > > -----Original Message----- > From: Priscilla Oppenheimer [mailto:[EMAIL PROTECTED]] > Sent: Friday, February 07, 2003 1:24 PM > To: [EMAIL PROTECTED] > Subject: RE: Catalyst 4000 and DHCP [7:62632] > > > Tunde Kalejaiye wrote: > > > > hi all, > > > > we just upgraded our network to a switched, a catalyst 4006 to be > > exact....some users have been getting 'no domain server > > available ....' > > error message. they usually have to try more than 4 - 6 times to > > successfully log on to the network. > > has anybody come across this problem before? what work around > > did u use > > besides configuring static ip addresses? > > thanks for your response(s) in advance > > Your message title implies that there's a problem with DHCP, but then your > message text implies that the problem is with Windows networking, > specifically a client trying to reach the domain controller? (I assume you > mean the Windows type domain server and not the IP Domain Name System.) > > So, verify for yourself and us that DHCP is working first. If the failure is > with DHCP, try the stuff other folks recommended. Enable portfast so that > the clients can start receiving replies to their DHCP request ASAP. Also, > you may need a helper address, depending on where your DHCP server is > located. Feel free to send us more info about your topology and > configuration. > > Then, you have to get Winblows working. I did have all sorts of problems > getting this to work with a consulting client who had upgraded to VLANs. > Unfortunately, he fixed the problems in the end without my help, so I don't > know the details, one of the frustrating things about being a consulant. (A > lot of help that is. ;-) But you could look through some Group Study > messages from about a month ago. A bunch of folks had ideas to help. I think > the title of the thread was something about Windows Networking. > > Here's one message that a wise person on the list sent' I've forgotten who, > sorry. > > "Simplest solution is to put a WINS Server on the Subnet that can't find the > DC. Configure it to replicate with the DC on the other Subnet, or Statically > configure the Domain Name entry for the NT Domain on the WINS Server in the > troubled subnet. Your "DC Not Found" issue should be resolved then. > > More Administratively intensive solution is to modify the LMHOSTS file to > have the following entry on every Windows Workstation/Server in the troubled > subnet. > > IP.ADD.RE.SS MachineName #PRE #DOM:Domain-Name" > > > Microsoft has tons of documentation on this sort of thing. > > Keep us posted! Thanks, > > Priscilla > > > > > > Tunde > ************************************************************ ********** > This email and any files transmitted with it are confidential and > intended solely for the use of the individual or entity to whom they > are addressed. If you have received this email in error please notify > the sender by email, delete and destroy this message and its > attachments. > ************************************************************ ********** [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=62668&t=62632 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
