[Kea-users] Recieving DHCP4_PACKET_PROCESS_STD_EXCEPTION

Thomas Markwalder tmark at isc.org
Wed Jul 24 19:32:58 UTC 2019


Hi Justin:

It would help us chase this down if you could send us the PCAP. You can 
do this by opening a bug issue in gitlab, marking it as confidential, 
and then attaching the PCAP.

https://gitlab.isc.org/isc-projects/kea/issues


Thanks,

Thomas Markwalder
ISC Software Engineering



On 7/24/19 3:03 PM, Justin Bail wrote:
>
> Setup: Ubuntu server 18.04.2 Kea 1.4.0-P1
>
> We are migrating our subnets from isc dhcp to kea dhcp.  We thought we 
> had everything ironed out then this came up.
>
> We get these messages in kea_dhcp.log
>
>>
> 	
>
> kea_dhcp 2019-07-24 14:57:37.878 ERROR [kea-dhcp4.packets/23825] 
> DHCP4_PACKET_PROCESS_STD_EXCEPTION exception occurred during packet 
> processing: failed to parse an option '1' holding string value - empty 
> value is not accepted
>
>>
> We found this in the messages doc but didn’t find specific information 
> to troubleshoot it.
>
> We changed logging to debug with no luck in capturing anything else 
> about the discover.
>
> We are only seeing these issues so far when something sends option 60 
> information. Specifically Meraki devices.  We are not doing anything 
> with option 60 in our config.
>
> The mac address of the device does not appear in the logs which makes 
> troubleshooting harder.  I did get the discover in a tcp dump from one 
> of the affected devices.  That packet is below with our information 
> and the customer’s redacted.
>
> 13:37:41.755777 IP (tos 0x0, ttl 254, id 14712, offset 0, flags 
> [none], proto UDP (17), length 382)
>
>     gatewayaddress.bootps > harpy.bootps: [udp sum ok] BOOTP/DHCP, 
> Request from customer’s mac address (oui Unknown), length 354, hops 1, 
> xid 0x54ef0604, Flags [none] (0x0000)
>
>           Gateway-IP the subnet’s gateway here
>
>           Client-Ethernet-Address e0:cb:bc:bc:92:34 (oui Unknown)
>
>           Vendor-rfc1048 Extensions
>
>             Magic Cookie 0x63825363
>
>             DHCP-Message Option 53, length 1: Discover
>
>             Client-ID Option 61, length 7: ether customer’s mac
>
>             Hostname Option 12, length 22: "customer gear"
>
>             Vendor-Class Option 60, length 6: "MERAKI"
>
>             Vendor-Option Option 43, length 3: 1.0.255
>
>             Parameter-Request Option 55, length 7:
>
>               Subnet-Mask, Domain-Name, Default-Gateway, BR
>
>               Hostname, Domain-Name-Server, MTU
>
>             Agent-Information Option 82, length 48:
>
>               Circuit-ID SubOption 1, length 32: **********
>
>               Remote-ID SubOption 2, length 12: **************
>
>             END Option 255, length 0
>
>             SS Option 16, length 0
>
>             PAD Option 0, length 0, occurs 2|[rfc1048]
>
> Justin Bail
> Systems Engineer
> Office:(812) 935-2429
> Justin.Bail at smithville.com|smithville.com <http://www.smithville.com/>
>
>
>
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