No Option 125 in DHCP Log

[Lakshmi Ganesh Vavilapalli]

Hello,

Background: We have two routers in one of our locations and the DHCP is running locally on the routers. One is 800 series and the other is 1900 series routers. We did a split of network 10.27.100.0/24 and the configuration as below. 

Router 1:

ip dhcp excluded-address 10.27.100.1 10.27.100.30
ip dhcp excluded-address 10.27.100.129 10.27.100.254
!
ip dhcp pool Vlan100
import all
network 10.27.100.0 255.255.255.0
default-router 10.27.100.1
dns-server 10.77.16.55 10.77.16.58 10.96.8.55 10.91.8.55
netbios-name-server 10.77.16.101
netbios-node-type h-node
option 43 hex f108.0a4d.695b.0a4d.695c
option 161 ip 10.77.16.62
option 162 ascii /wyse/027$
option 4 ip 10.77.16.55 10.77.16.58 10.96.8.55 10.91.8.55
option 42 ip 10.77.16.55 10.77.16.58 10.96.8.55 10.91.8.55
option 186 ip 10.77.16.62
option 60 ascii "Cisco AP c3500"
lease 3

Router 2:

no ip dhcp conflict logging
ip dhcp excluded-address 10.27.100.1 10.27.100.128
!
ip dhcp pool Vlan100
import all
network 10.27.100.0 255.255.255.0
default-router 10.27.100.1
dns-server 10.77.16.55 10.77.16.58 10.96.8.55 10.91.8.55
netbios-name-server 10.77.16.101
netbios-node-type h-node
option 43 hex f108.0a4d.695b.0a4d.695c
option 161 ip 10.77.16.62
option 162 ascii /wyse/027$
option 4 ip 10.77.16.55 10.77.16.58 10.96.8.55 10.91.8.55
option 42 ip 10.77.16.55 10.77.16.58 10.96.8.55 10.91.8.55
option 186 ip 10.77.16.62
option 60 ascii "Cisco AP c3500"
lease 3

Some of our wireless devices were having issues when trying to get the DHCP addresses. It works at time when we restart several times or when I manually clear the DHCP bindings. I ran debug commands on the both the routers and Router 1 is fine and on Router 2 i see the below messages. I pasted for just one client as a reference this messages are received for multiple clients. Can someone help me with whats going on?

Is the configuration set right?  Any help is appreciated. 

The default router IP address is the HSRP virtual IP address. 

Oct 28 12:45:19.128 CDT: DHCPD: client's VPN is .
Oct 28 12:45:19.128 CDT: DHCPD: No option 125
Oct 28 12:45:19.128 CDT: DHCPD: DHCPINFORM received from client 01f8.b156.a09a.2d (10.27.100.144).
Oct 28 12:45:19.128 CDT: DHCPD: Sending DHCPACK to client 01f8.b156.a09a.2d (10.27.100.144).
Oct 28 12:45:19.128 CDT: DHCPD: no option 125
Oct 28 12:45:19.128 CDT: DHCPD: broadcasting BOOTREPLY to client f8b1.56a0.9a2d.
Oct 28 12:47:14.969 CDT: DHCPD: checking for expired leases.

[Georg Pauwen]

Hello,

usually you would see this message if there is no interface configured on your router with an IP address from the network specified in your DHCP pool, but since you have 10.27.100.1 as your default router, I assume that IP address is configured on your router ?

[Lakshmi Ganesh Vavilapalli]

That is not configured on the interface, like I mentioned its the HSRP virtual IP. 10.27.100.2  is the IP address configured on the Interface of the router. 

See below for Router 2 

#sh ip int br
Interface IP-Address OK? Method Status Protocol
Embedded-Service-Engine0/0 unassigned YES NVRAM administratively down down
GigabitEthernet0/0 unassigned YES NVRAM down down
GigabitEthernet0/1 unassigned YES NVRAM up up
GigabitEthernet0/1.100 10.27.100.2 YES manual up up
GigabitEthernet0/1.111 10.27.111.2 YES NVRAM up up
Serial0/0/0 unassigned YES NVRAM down down
Loopback10 unassigned YES unset up up

#sh standby brief
P indicates configured to preempt.
|
Interface Grp Pri P State Active Standby Virtual IP
Gi0/1.100 100 120 P Standby 10.27.100.3 local 10.27.100.1

[Georg Pauwen]

So on router 1 you have configured 10.27.100.3 ?

[Lakshmi Ganesh Vavilapalli]

Yes

Router 1 :

#sh ip int br
Interface IP-Address OK? Method Status Protocol
FastEthernet0 unassigned YES unset up up
FastEthernet1 unassigned YES unset administratively down down
FastEthernet2 unassigned YES unset administratively down down
FastEthernet3 unassigned YES unset administratively down down
Tunnel2 10.77.252.27 YES NVRAM up up
Vlan1 unassigned YES NVRAM administratively down down
Vlan100 10.27.100.3 YES manual up up
Vlan111 10.27.111.3 YES NVRAM up up

#sh standby brief
P indicates configured to preempt.
|
Interface Grp Pri P State Active Standby Virtual IP
Vl100 100 200 P Active local 10.27.100.2 10.27.100.1

Thank you 

[Georg Pauwen]

Lakshmi,

what wireless devices are trying to get an address from your router ? I am thinking it could have something to do with the fact that one of the routers is active and the other standby. Is it possible to temporarily disable HSRP and see if the problem persists ?

[Lakshmi Ganesh Vavilapalli]

They are hand held devices RF guns. I can try that, but do you have any other suggestions besides disabling HSRP. 

[Georg Pauwen]

Hello Lakshmi,

on second thought, disabling HSRP might not be such a good idea, the config looks fine and does work. I am now thinking: why not actually configure option 125 ? What is the brand and type of the handheld devices ?