SH4 in modem mode responding to 2 ips 192.168.100.1 and 192.168.0.1?

 Yeah that, i gathered. I should mentioned initially some web searching took me to other occurances of the same issue on the SH4 and it does sound like a fault with the Firmware that normally can be resolved with a factory reset but for devices that it doesn't resolve then its a HW swap job.  I only noticed the issue when one day I was too lazy to mess around with an old semi managed switch which still had its default IP which was unfortunately 192.168.0.1 which I wasnt able to reach as I kept hitting my SH4 which made me wonder as knowing I was in modem mode it should of only responded to 192.168.100.1 which also loaded.  Thanks for your reply though, yes it will work but its def not supposed to do this I'm just lucky I don't use any sort of MAC to IP bind spoofing detection on my Firewall or that could lead to some problems. I may just have to call the dreaded 150 number, as the web chat support channel seems to be difficult to access on purpose nowdays..

surely its not supposed to do that, Im an IT engineer and ive never seen it before unless u add additional IPS to a nic.. but if modem mode uses 192.168.100.1 then why should it also respond to router mode ip 192.168.1.1??? i havent checked mac addresses yet but surely theres a fault.  FYI i did read about this online and people were saying i was a firmware fault??

granted it works, but the biggest problem is that the 2 ips mac addresses are different which for my scenario is causing major headaches,,,  Would it be possible to request a replacement Hub 5 now??

I use a 3rd party firewall with sh4 in modem mode but the IPS and conflict detection is whats causing big problems 

Sorry what my last message was to suggest was that the 2 ips even on the Same physical hub port are using separate mac addresses which is obviously yes but why would the sh4 still use the 192.168.0.1 ip I'm modem mode which also makes that additional mac address visable. Modem mode on past hubs were always 192.168.100.1 only. I'm just wondering if this is actually a firmware bug especially after reading that the original sh5's don't have a modem mode? Anyway my main point being why is this happening on the sh4 when didn't on previous models? For sure it must provide some kind of vunarability?

Thanks for your replies I do appreciate them but I realise that the ips  are going to be on the lan side but I'm sure this has to be a faulty SH4 as this scenario shouldn't happen, granted the 192.168.100.1 ip used for modem mode has its own mac address and again for the 192.168.0.1 ip which also has its own mac address but I've never seen on older model Super hubs respond to both local ips at the same time in modem mode? See my 3rs party firewall has before I made changes seen the 2 ips with there separate macs on the same wan port of the firewall as suspicious macs via arp tables or conflicts in its IPS module. Hence why I posted originally in the hopes someone from VM might see this post and assist with a super hub replacement?

Like I mentioned ive had most of the prior models and modem mode was always on 192.168.100.1 only and router mode was always on 192.168.0.1 and there was never any crossover it was one ip and mac per mode.  Hence my initial thought that this has to be a fault or a bug with the SH4 model only, I'd be interested to know if other SH4 users see the same thing both modes local ips active and responding at the same time in either mode it's actually in?

It may be time to attempt at getting through to a helpful tech support agent via the vm app I suppose. 

Thanks 

I've reported an issue now anyway as I've been getting dropouts / reboots every day around 2am now and it's been every single day too. Although from other posts it seems this isn't an isolated problem either, but we'll see what they say, even the my virgin media app is useless for status tests now as every test it runs it performs a SH reset which makes no difference as it repeats the reset prompt every time too? 

Again I hate to repeat myself lol but you can't say my SH4 is normal having both it's modes ip's active at the same time in either mode can you?  As I say it has to be a fault or a firmware bug for this scenario to be happening as I say normal working in theory should be one ip for each mode router or modem mode. 

Do get what you mentioned regarding Ips though as that's how I resolved the issue originally adding an exception for the wan to SH4 by adding both ips and macs to get around the IPS feature that normally ip to mac pairs devices which is basically suspicious arp behaviour or ip to mac pairing conflict, normally I use the IPS feature which prevents ip to mac pairing miss matches on the same nic ports. 

Thanks for the feedback it's appreciated but I've now had to directly contact VM tech support.