Source IP and/or VLAN mismatch

[HaniAbuelkhair]

I have Z3 and i found this in the log

source_client_ip: 192.168.1.113, source_client_mac: 20:4E:F6:CB:15:3D, source_client_assigned_vlan: 0  « hide

last_illegal_ip	100.115.92.14
client_total_illegal_packets	558
all_total_illegal_packets	2973
last_reported_total	2963

I am getting this from Chrom box's randomly not sure why and its VLAN 0 !!!!!!!!!!!!!!!

i have only one VLAN 1

And whats this IP 100.115.92.14 ? its not even the WAN IP!!!

And when i run packet capture nothing is there and the chrom box is set to be DHCP no static

[Greenberet · Accepted solution]

sadly this issue isn't new.

Chrome devices are using this network block( I think a /24) for various things. Normally this network block is only used inside for the chome* device, but they are also getting used between chrome* devices.

The Z3 is correctly displaying this in the event log as your device is using it in your network.

[HaniAbuelkhair]

@Greenberet So nothing to worry about here?

[PhilipDAth]

@Greenberet seems to have the best answer.  I also found RFC 6598.

https://datatracker.ietf.org/doc/html/rfc6598 

"This document requests the allocation of an IPv4 /10 address block to
be used as Shared Address Space to accommodate the needs of Carrier-
Grade NAT (CGN) devices

...

The Shared Address Space address range is 100.64.0.0/10."

I'll guess ChromeCast has some kind of internal address, or perhaps even its LAN IP, and is wanting to NAT it into a known address space, so they chose this CGNAT block.