Send dhcp-users mailing list submissions to
[email protected]
Advertising
To subscribe or unsubscribe via the World Wide Web, visit
https://lists.isc.org/mailman/listinfo/dhcp-users
or, via email, send a message with subject or body 'help' to
[email protected]
You can reach the person managing the list at
[email protected]
When replying, please edit your Subject line so it is more specific
than "Re: Contents of dhcp-users digest..."
Today's Topics:
1. Re: ISC-dhcp subnet limit? (Simon Hobson)
2. Re: ISC-dhcp subnet limit? (Jos? Queiroz)
3. Re: ISC-dhcp subnet limit? (Rob Morin)
----------------------------------------------------------------------
Message: 1
Date: Fri, 29 Jan 2016 16:30:14 +0000
From: Simon Hobson <[email protected]>
To: Users of ISC DHCP <[email protected]>
Subject: Re: ISC-dhcp subnet limit?
Message-ID: <[email protected]>
Content-Type: text/plain; charset=windows-1252
Rob Morin <[email protected]> wrote:
> Currently we made dhcp-2 a standalone server ...
Did you also edit the ranges on both servers to be non-overlapping ?
One thing you must *NOT* do is have two independent servers with overlapping
ranges - down that route lies the path to random strange problems.
Thinking about one bit of your original question. I'm assuming that all
requests are coming via remote relay agents - is that correct ?
If so, then the routing doesn't really matter. The inbound interface will be
determined by the route(s) available from the relay agent (or client *) to the
address(es) it's configured to send the packets to. The outbound interface will
be determined by the route(s) available from the server to the gateway
interface address (GI-Addr) field in the request packet (or client address *).
It doesn't matter (for the DHCP anyway) if there is triangular routing in place
- but you need to ensure that any filtering/firewalls allows the packets
through.
* When a client has an active lease, it will unicast a renewal request to the
server that granted the lest in order to request an extension to it. So you
need unicast traffic allowed between clients and server.
Something else to look at is logging. IIRC Syslog defaults to synchronous
logging for a lot of things - and that means a lot of disk activity logging the
DHCP activities. At the expense of losing some logging if the system crashes,
you can configure async logging so there isn't a file sync on avery log
message. This can significantly reduce disk activity and improve performance.
------------------------------
Message: 2
Date: Fri, 29 Jan 2016 15:22:54 -0200
From: Jos? Queiroz <[email protected]>
To: Users of ISC DHCP <[email protected]>
Subject: Re: ISC-dhcp subnet limit?
Message-ID:
<CADeaZRwOYcTbK=auouujdhvqazqf9hnrojmttx1ov8dksb1...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
2016-01-29 13:58 GMT-02:00 Rob Morin <[email protected]>:
> I will try your suggestion on dev machine
> Do you use or know of a tool that i can use to simulate dhcp request for
> testing on my dev machine?
>
>
A virtual machine with a Linux LiveCD may do what you need. If you're using
Ubuntu, you may run it with VirtualBox from the dev machine, itself.
If you're used to GNS3 (www.gns3.net), you may create a tiny virtual host
with VPCS that just requests DHCP, pings and traceroute to destinations.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.isc.org/pipermail/dhcp-users/attachments/20160129/44220063/attachment-0001.html>
------------------------------
Message: 3
Date: Fri, 29 Jan 2016 12:40:47 -0500
From: Rob Morin <[email protected]>
To: Users of ISC DHCP <[email protected]>
Subject: Re: ISC-dhcp subnet limit?
Message-ID: <[email protected]>
Content-Type: text/plain; charset="windows-1252"; Format="flowed"
Ya i setup 2 VMs in openstack to test.... settign up a 3rd for sending
requests is not a bad idea.. :)
Thanks
:)
Rob Morin
Montreal, Canada
On 2016-01-29 12:22 PM, Jos? Queiroz wrote:
>
>
> 2016-01-29 13:58 GMT-02:00 Rob Morin <[email protected]
> <mailto:[email protected]>>:
>
> I will try your suggestion on dev machine
> Do you use or know of a tool that i can use to simulate dhcp
> request for testing on my dev machine?
>
>
> A virtual machine with a Linux LiveCD may do what you need. If you're
> using Ubuntu, you may run it with VirtualBox from the dev machine, itself.
> If you're used to GNS3 (www.gns3.net <http://www.gns3.net>), you may
> create a tiny virtual host with VPCS that just requests DHCP, pings
> and traceroute to destinations.
>
>
>
> _______________________________________________
> dhcp-users mailing list
> [email protected]
> https://lists.isc.org/mailman/listinfo/dhcp-users
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.isc.org/pipermail/dhcp-users/attachments/20160129/e57e6940/attachment-0001.html>
------------------------------
_______________________________________________
dhcp-users mailing list
[email protected]
https://lists.isc.org/mailman/listinfo/dhcp-users
End of dhcp-users Digest, Vol 87, Issue 21
******************************************
