The routing functionality on the C2's support an ip helper-address configuration. When setup, it will forward all DHCP requests to a remote DHCP server. The DHCP server does not need to reside on the same network as the hosts. I am currently working on a network with 6000 users, 4000 in remote offices all over the state. We have one Windows DHCP server at the main site handling everything. We are using C3's in router mode, but the operation is very similar. This may allow you to do what you need.
-----Original Message----- From: Kim Pedersen [mailto:[email protected]] Sent: Thursday, May 27, 2010 2:06 PM To: Enterasys Customer Mailing List Subject: Re: [enterasys] Statically assigned DHCP addresses on C2/3 switch stack Thanks for your suggestions. The issue has come up due to a couple of locations that each runs a C2 stack with 3 /24 networks on 3 VLANs. Each network was connected to a firewall that would route between the networks and provide Internet access, and it also provided the necessary DHCP services. What happened was that these locations were then linked via fiber to a central switch with an additional 8 /24 networks. Full routing between all of these networks were desirable, but to avoid hardcoding routes in all the clients, the C2 stack was made the default gateway, and the firewall was then placed on a separate network and used as default gateway for the C2 switch. This made the firewall less useful as a DHCP server. In short we have switched over to use the C2 switch routing facility, and were now investigating it's usefulness as a DHCP server. I would prefer using ISC DHCP as well, but these networks have no servers, and its not an option to install anything either (Due to maintenance and reliability issues) Thanks for the input! -- Kim Pedersen CNCS Ltd. Tel: +1 246 427 3737 On 2010-05-27 13:51, Lou H. Goddard wrote: > Greetings, > > I'd suggest using ISC's DHCPD for its flexibility and stability. > > Thanks, > > Lou Goddard > > Network Engineer > > 302-552-8053 > > [email protected] > > ----- Original Message ----- > From: Andy Middlehurst<[email protected]> > Sent: Thu, 5/27/2010 1:45pm > To: Enterasys Customer Mailing List<[email protected]> > Subject: RE: [enterasys] Statically assigned DHCP addresses on C2/3 switch > stack > > Kim, > > I don't think the C2/C3 has the capability to do more than 16 dhcp pools > (either dynamic and/or static). > > It's not really designed to do more than basic stuff like this so > Jason's idea of statically configuring the IP on the devices themselves > and excluding these from the DHCP dynamic pool on the C3 is one > workaround, although I would always recommend a dedicated DHCP server. > > Regards, > > Andy Middlehurst > > > > -----Original Message----- > From: Parker, Jason [mailto:[email protected]] > Sent: 27 May 2010 18:34 > To: Enterasys Customer Mailing List > Subject: RE: [enterasys] Statically assigned DHCP addresses on C2/3 > switch stack > > Accept-Language: en-US > Content-Language: en-US > X-MS-Has-Attach: > X-MS-TNEF-Correlator: > acceptlanguage: en-US > Content-Type: text/plain; charset="us-ascii" > Content-Transfer-Encoding: quoted-printable > MIME-Version: 1.0 > Received-SPF: None (maedg-nlb.ets.enterasys.com: [email protected] > does > not designate permitted sender hosts) > X-Reverse-DNS: unknown > X-Proofpoint-Virus-Version: vendor=fsecure > engine=1.12.8161:2.4.5,1.2.40,4.0.166 > definitions=2010-05-27_03:2010-02-06,2010-05-27,2010-05-27 signatures=0 > X-Proofpoint-Spam-Details: rule=uncdefault_notspam policy=uncdefault > score=0 spamscore=0 ipscore=0 > phishscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 > reason=mlx > engine=6.0.2-1004200000 definitions=main-1005270123 > > All, > > To provide more details on my comments: > > My thinking is that Servers and switches should be in the exclude line > and = > should be static addresses > > set dhcp exclude 192.168.0.90 192.168.0.90 (My DHCP server) > set dhcp exclude 192.168.0.190 192.168.0.190 (My Radius Server) > set dhcp exclude 192.168.0.90 192.168.0.109 (DFE/N Switch) > set dhcp exclude 192.168.0.190 192.168.0.110 (A2) > set dhcp exclude 192.168.0.90 192.168.0.90 (C3) > set dhcp exclude 192.168.0.190 192.168.0.190 (B3) > > My D2 is my DHCP server at the time of my test > Thank you > Jason Parker > > -----Original Message----- > From: Parker, Jason=20 > Sent: Thursday, May 27, 2010 1:05 PM > To: Enterasys Customer Mailing List > Subject: RE: [enterasys] Statically assigned DHCP addresses on C2/3 > switch = > stack > > Kim, > > This is how I have been setting it up and it works. It is time consuming > bu= > t It always works. You could exclude these addresses and just manual set > th= > e switches but PC's need to be set up this way. > > Jason > > -----Original Message----- > From: Kim Pedersen [mailto:[email protected]]=20 > Sent: Wednesday, May 26, 2010 11:50 PM > To: Enterasys Customer Mailing List > Subject: [enterasys] Statically assigned DHCP addresses on C2/3 switch > stac= > k > > > Hello everyone, > > I am trying to assign static IP addresses to a bunch of systems using > a=20 > C2/C3 stack as the DHCP Server, and am wondering if I am > understanding=20 > the documentation right, and it really is necessary to write 4 lines > of=20 > configuration PER host entry? > > For instance I have defined a dynamic pool for a wifi network, so the=20 > DHCP server will assign ip addresses on the 192.168.11.0/24 network. > > But as an example I'd like to statically assign all the wireless > access=20 > points on the network using DHCP, and it would seem I need the > following: > > set dhcp pool gfs-wifi > set dhcp pool gfs-wifi dns-server 192.168.15.254 > set dhcp pool gfs-wifi default-router 192.168.11.254 > set dhcp pool gfs-wifi network 192.168.11.0 255.255.255.0 > > set dhcp pool ap-gs10 hardware-address 0011.888b.ff40 > set dhcp pool ap-gs10 host 192.168.11.1 255.255.255.0 > set dhcp pool ap-gs10 network 192.168.11.0 255.255.255.0 > set dhcp pool ap-gs10 dns-server 192.168.15.254 > > set dhcp pool ap-gs11 hardware-address 0011.888b.6680 > set dhcp pool ap-gs11 host 192.168.11.2 255.255.255.0 > set dhcp pool ap-gs11 network 192.168.11.0 255.255.255.0 > set dhcp pool ap-gs11 dns-server 192.168.15.254 > > set dhcp pool ap-gs20 hardware-address 0011.888c.4780 > set dhcp pool ap-gs20 host 192.168.11.3 255.255.255.0 > set dhcp pool ap-gs20 network 192.168.11.0 255.255.255.0 > set dhcp pool ap-gs20 dns-server 192.168.15.254 > > set dhcp pool ap-gs30 hardware-address 0011.888c.8c00 > set dhcp pool ap-gs30 host 192.168.11.4 255.255.255.0 > set dhcp pool ap-gs30 network 192.168.11.0 255.255.255.0 > set dhcp pool ap-gs30 dns-server 192.168.15.254 > > set dhcp pool ap-gs40 hardware-address 0011.888b.4280 > set dhcp pool ap-gs40 host 192.168.11.5 255.255.255.0 > set dhcp pool ap-gs40 network 192.168.11.0 255.255.255.0 > set dhcp pool ap-gs40 dns-server 192.168.15.254 > > set dhcp pool ap-gs50 hardware-address 0011.888b.d5c0 > set dhcp pool ap-gs50 host 192.168.11.6 255.255.255.0 > set dhcp pool ap-gs50 network 192.168.11.0 255.255.255.0 > set dhcp pool ap-gs50 dns-server 192.168.15.254 > > > So in effect I need to define a 1 host address pool for every static=20 > assignment I want to do, which besides being inconvenient may not > even=20 > be possible to do for 40-50 hosts on a /24 network. > > Have I misunderstood the documentation, or is this really the way it > has=20 > to be done? > > > > --=20 > Kind regards > Kim Pedersen > CNCS Ltd. > > > > --- > To unsubscribe from enterasys, send email to [email protected] with the > body= > : unsubscribe enterasys [email protected] > > > > --- > To unsubscribe from enterasys, send email to [email protected] with the > body: unsubscribe enterasys [email protected] > > --- > To unsubscribe from enterasys, send email to [email protected] with the body: > unsubscribe enterasys [email protected] > > > > ------------------ CONFIDENTIALITY NOTICE --------------- > > This message, including any attachments, is for the sole use of the > intended recipient(s) and may contain privileged confidential information > protected by law. 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