OPNsense
  • Home
  • Help
  • Search
  • Login
  • Register

  • OPNsense Forum »
  • Archive »
  • 17.1 Legacy Series »
  • DHCP failover / subnet delay question
« previous next »
  • Print
Pages: [1]

Author Topic: DHCP failover / subnet delay question  (Read 1352 times)

With Wings

  • Newbie
  • *
  • Posts: 20
  • Karma: 1
    • View Profile
DHCP failover / subnet delay question
« on: May 11, 2017, 04:42:46 am »
I'm having issues getting CARP VIP sync to work on Mikrotik switches. Changing the VHID didn't help. So I set all the interfaces to use IP Alias.

XMLRPC sync works just fine for all High Availability settings via a dedicated interface.

DHCP failover didn't work at all using IP Aliases. The interface does say to use CARP, so I am assuming it means CARP VIP, and not High Availability.

All three interfaces were showing either:

'My State':
communications-interrupted
recover

'Peer State':
normal
unknown-state

or vice versa.

Removing the failover IP allows both peers to serve IP addresses.

Typically in this case I will assign a part of the subnet to each peer, or add a subnet delay.

Am I right in thinking that the CARP VIP is the issue, and that I can't use IP Alias for DHCP Failover?
Logged

With Wings

  • Newbie
  • *
  • Posts: 20
  • Karma: 1
    • View Profile
Re: DHCP failover / subnet delay question
« Reply #1 on: May 11, 2017, 04:56:05 am »
Also I'm seeing this from a switch on my lab network:

00:00:00:00:01:01
XEROX CORPORATION         2017/05/11 02:39:56    tstp never

Which is apparently a BootP client, getting a perpetual lease from this thread:

https://forum.pfsense.org/index.php?topic=82884.0

Is there a way to disable BootP completely?

Logged

With Wings

  • Newbie
  • *
  • Posts: 20
  • Karma: 1
    • View Profile
Re: DHCP failover / subnet delay question
« Reply #2 on: May 11, 2017, 04:57:29 am »
This is the part that is confusing to me:

Services > DHCP > Servers > <Interface> (Tab) > 'Failover Peer IP':

"Machines must be using CARP. Interface's advskew determines whether the DHCPd process is Primary or Secondary. Ensure one machine's advskew<20 (and the other is >20)."

Also, where is the advskew setting located?
« Last Edit: May 11, 2017, 04:59:07 am by With Wings »
Logged

  • Print
Pages: [1]
« previous next »
  • OPNsense Forum »
  • Archive »
  • 17.1 Legacy Series »
  • DHCP failover / subnet delay question
 

OPNsense is an OSS project © Deciso B.V. 2015 - 2019 All rights reserved
  • SMF 2.0.15 | SMF © 2017, Simple Machines
    Privacy Policy
    | XHTML | RSS | WAP2