DHCP server details on Cisco switch

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    I have a Cisco Catalyst 2960G-24TC-L here.  I see that it supports
DHCP server functionality.  Can this be configured to serve DHCP clients that
are not in the same subnet/VLAN in which the switch's management interface
resides?  In this scenario, the DHCP clients are configured to attach to
access ports on the switch which are in a VLAN which is private to the switch.
If this is possible, I assume I'll need to designate an IP address for the
switch to associate with the DHCP service that's in the same subnet/VLAN as
the DHCP clients; I'm wondering how to accomplish this.

Thanks,
Mike

Re: DHCP server details on Cisco switch
On 09/12/11 05:17, Michael T. Davis wrote:
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Try www.google.com  "cisco 2960 switch dhcp server configuration "
worked for me.

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Re: DHCP server details on Cisco switch

writes:

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    I've been browsing through hits on this and similar searches, and
trying to navigate Cisco's documentation maze.  I could really use a more
specific pointer (or outright instructions).

    According to Cisco documentation, I may be limited to only setting
an IP address for a single VLAN, which defines this as the management VLAN.
Other examples I've found seem to indicate each VLAN can have its own IP
address; if this is the case, which one is the management VLAN?  (Presumably,
the VLAN interface has to have an IP address in the same subnet as the clients
to be served via DHCP.)  There's a seemingly functional "ip helper-address"
command available on the VLAN interfaces, but none of the device-specific
manuals I've found document this.  I would also be interested in limiting
things via the "ip forward-protocol" global command, but this isn't recognized
by the current IOS version on the switch, 12.2(25)SEE2.  I know this is old,
but since I can't find information for the referenced commands in
documentation for any versions of IOS _for_this_model_, I don't know if
upgrading would help any.

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Regards,
Mike

Re: DHCP server details on Cisco switch
Michael T. Davis wrote:

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Why not try it cant do any harm ,not.

Don’t do what I did put an IOS on a 2610 router in my Cisco lab without
reading the requirements properly .

The IOS fitted on the flash but there was insufficient memory and the router
fell over mid boot every time ,reloading the old IOS via romon is a p.i.t.a



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Re: DHCP server details on Cisco switch
On Fri, 9 Dec 2011 05:17:46 +0000 (UTC), DAVISM@ecr6.ohio-state.edu (Michael T.
Davis) wrote:

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Not sure about that specific model of switch.  Some switches can only be
configured with a single L3 interface (SVI), so they can have an IPv4 point of
presence in only one VLAN.  Such switches can therefore directly provide DHCP
service only to that one VLAN.  However, if the default routers for the other
VLANs are configured via "ip helper-address" to forward DHCP from those subnets
to your switch, then your switch's DHCP server can serve scopes for those VLANs
as well.

Other switches can be configured with multiple IP addresses on multiple SVIs.
Here's a typical config from such a switch:


interface Vlan136
 ip address 192.168.136.1 255.255.255.0
!
interface Vlan137
 ip address 192.168.137.1 255.255.255.0
!
ip dhcp pool NET136
   network 192.168.136.0 255.255.255.0
   default-router 192.168.136.1
!
ip dhcp pool NET137
   network 192.168.137.0 255.255.255.0
   default-router 192.168.137.1

Aaron

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