DHCP / DHCPD server stopped working 5.0
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DHCP / DHCPD server stopped working 5.0

L3 Networker

PAN OS 5.0

App Version 342-1602 (12/04/12)

Uptime 22 days


PAN-OS DHCP server stopped working today (worked earliar only change wildfire & global protect updates)

DHCP server status shows it is not enabled although configured.

<says not configured>

admin@PA-200> show dhcp server lease ethernet1/4

dhcp server is not enabled on interface 'ethernet1/4' or configuration not committed yet

<no lease>
admin@PA-200> show dhcp server lease all

<tried clearing but nothing to clear>

admin@PA-200> clear dhcp lease all

Cleared 0 leases.

<dhcp log>

tail follow yes mp-log dhcpd.log

also doesn't show any logs since 12/6 days ago..

I've tried disabling dhcp on the interface, commit and reenabled and commit with no success.

Config snip

dhcp {

          interface {

            ethernet1/4 {

              server {

                option {

                  lease {

                    timeout 2880;

                  }

                  gateway 10.1.1.1;

                  dns {

                    primary 208.67.222.222;

                    secondary 198.153.192.40;

                  }

                }

                mode enabled;

                probe-ip yes;

                ip-pool 10.1.1.10-10.1.1.24;

                reserved {

planning to open a case but wondering if there is anything else i can try besides rebooting.

I also noticed a 'debug dhcpd global ' command but not sure where its logging to work to.


admin@PA-200> debug dhcpd global
> off    off
> on     on
> show   show

admin@PA-200> debug dhcpd global show

sw.dhcpd.runtime.debug.level: debug

1 ACCEPTED SOLUTION

Accepted Solutions

Hello, we have isolated some DHCP issues internally.  If this issue does continue to persist I recommend opening a case with support. 

Otherwise we have addressed some issues in PAN-OS 5.0.1 with regards to DHCP.  I recommend upgrading to PAN-OS 5.0.1.

View solution in original post

7 REPLIES 7

L3 Networker

So after troubleshooting for close to 4 hours the problem just fixed itself... :smileyshocked:

Logs below show no dhcp from 2012/12/09 16:34:21 to 2012/12/10 00:07:54

min@PA-200> show log system subtype equal dhcp start-time equal 2012/12/09@15:00:00

Time                Severity Subtype Object EventID ID Description

===============================================================================

2012/12/09 15:03:12 info     dhcp           lease-s 0  DHCP lease started ip 10.1.1.15 --> mac 98:4b:4a

:67:ac:04, interface ethernet1/4

2012/12/09 15:04:18 info     dhcp           lease-s 0  DHCP lease started ip 10.1.1.19 --> mac 00:24:e8

:9d:08:3a, interface ethernet1/4

2012/12/09 15:38:08 info     dhcp           lease-s 0  DHCP lease started ip 10.1.1.15 --> mac 98:4b:4a

:67:ac:04, interface ethernet1/4

2012/12/09 15:38:12 info     dhcp           lease-s 0  DHCP lease started ip 10.1.1.10 --> mac 74:f0:6d

:42:e6:82, interface ethernet1/4

2012/12/09 16:30:30 info     dhcp           lease-s 0  DHCP lease started ip 10.1.1.15 --> mac 98:4b:4a

:67:ac:04, interface ethernet1/4

2012/12/09 16:34:21 info     dhcp           lease-s 0  DHCP lease started ip 10.1.1.19 --> mac 00:24:e8

:9d:08:3a, interface ethernet1/4

2012/12/09 23:58:37 info     dhcp           server- 0  DHCP server on. interface ethernet1/4

2012/12/10 00:07:54 info     dhcp           lease-s 0  DHCP lease started ip 10.1.1.15 --> mac 98:4b:4a

:67:ac:04, interface ethernet1/4

2012/12/10 00:08:21 info     dhcp           lease-s 0  DHCP lease started ip 10.1.1.23 --> mac e8:99:c4

:0a:1d:cf, interface ethernet1/4

2012/12/10 00:09:39 info     dhcp           lease-s 0  DHCP lease started ip 10.1.1.16 --> mac 00:24:d7

:94:39:80, interface ethernet1/4

2012/12/10 00:10:07 medium   dhcp           server- 0  DHCP server runs out of ip pool interface ethern

et1/4

2012/12/10 00:14:03 info     dhcp           lease-s 0  DHCP lease started ip 10.1.1.15 --> mac 98:4b:4a

:67:ac:04, interface ethernet1/4

2012/12/10 00:17:02 info     dhcp           lease-s 0  DHCP lease started ip 10.1.1.16 --> mac 00:24:d7

:94:39:80, interface ethernet1/4

admin@PA-200>

at 23:58:37 it just enabled dhcp on its own.

2012/12/09 23:58:37 info     dhcp           server- 0  DHCP server on. interface ethernet1/4

admin@PA-200> show log config start-time equal 2012/12/09@15:00:00

Time                Host            Command   Admin      Client Result

===============================================================================

2012/12/09 16:47:48 10.1.1.19       edit      admin      Web    Succeeded  (Data filtering changes to wildfire)

2012/12/09 16:48:04 10.1.1.19       commit    admin      Web    Submitted

2012/12/09 22:59:31 10.1.1.19       edit      admin      Web    Succeeded

2012/12/09 23:15:15 10.1.1.19       commit    admin      Web    Submitted

2012/12/09 23:25:22 10.1.1.19       edit      admin      Web    Succeeded (DHCP ethernet1/4 set to disable)

2012/12/09 23:25:36 10.1.1.19       commit    admin      Web    Submitted

2012/12/09 23:27:02 10.1.1.19       edit      admin      Web    Succeeded (DHCP ethernet1/4 set to enable)

2012/12/09 23:27:31 10.1.1.19       commit    admin      Web    Submitted

atleast it fixed it self but still concerning

Hello, we have isolated some DHCP issues internally.  If this issue does continue to persist I recommend opening a case with support. 

Otherwise we have addressed some issues in PAN-OS 5.0.1 with regards to DHCP.  I recommend upgrading to PAN-OS 5.0.1.

View solution in original post

thank you i've upgraded to 5.0.1 and have not yet seen this issue happen again

Hello.

I don't think this issue has been resolved yet.

A customer (running PAN-OS 5.0.1) called today saying their DHCP on wireless isn't working. I checked the leases and I could see a few but none were from last couple of hours. After checking configuration (and finding out everything is ok) I decided to disable and enable again DHCP service on the interface where it wasn't working. In total there were 2 interfaces with DHCP configured on them. After enabling DHCP again and committing policy I tried to list leases again. But DHCP wasn't working on either interface! I checked configuration again and everything was ok. I tried deleting and configuring DHCP again but it didn't help. I tried enable in disabling it again but nothing worked. Last entry in dhcpd.log was 6 days old so that was no help either. After a while (between 1 and 2 hours) DHCP appeared again on both interfaces and started working.

So there are some serious issues with DHCP service in PAN-OS version 5.0.1 as well. Is there a way to start/stop/status dhcpd service from CLI?

Best regards,

Simon

Additional fixes regarding DHCP have gone into PAN OS 5.0.2. Here is a release note entry from the "Addressed issues" section for 5.0.2:

46849, 46844, 46681, 46474 – The firewall was intermittently failing to respond to DHCP requests from hosts after upgrading to PAN-OS 5.0. Issue due to a problem that occurred after lease information was saved on the firewall every 12 hours after a restart, the issue was cleared, but would then occur again after 12 hours.

DHCPD needs to be restarted from root if needed.

How do I login as root? Is it possible and allowed by PA?

You would have to contact Palo Alto Networks Support if a process needs to be restarted from root.

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